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Publisher: Springer-Verlag (Total: 2355 journals)

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Showing 1 - 200 of 2355 Journals sorted alphabetically
3D Research     Hybrid Journal   (Followers: 19, SJR: 0.214, h-index: 10)
4OR: A Quarterly J. of Operations Research     Hybrid Journal   (Followers: 10, SJR: 1.073, h-index: 25)
AAPS J.     Hybrid Journal   (Followers: 21, SJR: 1.192, h-index: 74)
AAPS PharmSciTech     Hybrid Journal   (Followers: 6, SJR: 0.718, h-index: 54)
Abdominal Imaging     Hybrid Journal   (Followers: 14, SJR: 0.723, h-index: 60)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 3, SJR: 0.447, h-index: 12)
Academic Psychiatry     Full-text available via subscription   (Followers: 23, SJR: 0.492, h-index: 32)
Academic Questions     Hybrid Journal   (Followers: 8, SJR: 0.135, h-index: 6)
Accreditation and Quality Assurance: J. for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26, SJR: 0.378, h-index: 30)
Acoustical Physics     Hybrid Journal   (Followers: 11, SJR: 0.355, h-index: 20)
Acoustics Australia     Hybrid Journal  
Acta Analytica     Hybrid Journal   (Followers: 7, SJR: 0.387, h-index: 6)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1, SJR: 0.624, h-index: 34)
Acta Biotheoretica     Hybrid Journal   (Followers: 5, SJR: 0.419, h-index: 25)
Acta Diabetologica     Hybrid Journal   (Followers: 13, SJR: 1.318, h-index: 46)
Acta Endoscopica     Hybrid Journal   (Followers: 1, SJR: 0.113, h-index: 8)
acta ethologica     Hybrid Journal   (Followers: 4, SJR: 0.465, h-index: 23)
Acta Geochimica     Hybrid Journal   (Followers: 6)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 2, SJR: 0.294, h-index: 13)
Acta Geotechnica     Hybrid Journal   (Followers: 7, SJR: 1.818, h-index: 22)
Acta Informatica     Hybrid Journal   (Followers: 5, SJR: 0.524, h-index: 32)
Acta Mathematica     Hybrid Journal   (Followers: 11, SJR: 8.021, h-index: 47)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2, SJR: 0.53, h-index: 29)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 6, SJR: 0.406, h-index: 30)
Acta Mathematica Vietnamica     Hybrid Journal   (SJR: 0.451, h-index: 5)
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal   (SJR: 0.22, h-index: 20)
Acta Mechanica     Hybrid Journal   (Followers: 20, SJR: 0.898, h-index: 52)
Acta Mechanica Sinica     Hybrid Journal   (Followers: 5, SJR: 0.426, h-index: 29)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5, SJR: 0.525, h-index: 18)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.524, h-index: 14)
Acta Neurochirurgica     Hybrid Journal   (Followers: 6, SJR: 0.833, h-index: 73)
Acta Neurologica Belgica     Hybrid Journal   (Followers: 1, SJR: 0.348, h-index: 27)
Acta Neuropathologica     Hybrid Journal   (Followers: 5, SJR: 6.61, h-index: 117)
Acta Oceanologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.295, h-index: 17)
Acta Parasitologica     Hybrid Journal   (Followers: 9, SJR: 0.581, h-index: 28)
Acta Physiologiae Plantarum     Hybrid Journal   (Followers: 2, SJR: 0.551, h-index: 39)
Acta Politica     Hybrid Journal   (Followers: 13, SJR: 0.658, h-index: 20)
Activitas Nervosa Superior     Hybrid Journal  
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5, SJR: 0.103, h-index: 4)
ADHD Attention Deficit and Hyperactivity Disorders     Hybrid Journal   (Followers: 22, SJR: 0.871, h-index: 15)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 8)
Administration and Policy in Mental Health and Mental Health Services Research     Partially Free   (Followers: 15, SJR: 0.795, h-index: 40)
Adsorption     Hybrid Journal   (Followers: 4, SJR: 0.774, h-index: 52)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 3, SJR: 0.319, h-index: 15)
Advances in Atmospheric Sciences     Hybrid Journal   (Followers: 34, SJR: 0.959, h-index: 44)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 15, SJR: 1.255, h-index: 44)
Advances in Contraception     Hybrid Journal   (Followers: 3)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 52, SJR: 1.113, h-index: 14)
Advances in Gerontology     Partially Free   (Followers: 8, SJR: 0.141, h-index: 3)
Advances in Health Sciences Education     Hybrid Journal   (Followers: 25, SJR: 1.397, h-index: 42)
Advances in Manufacturing     Hybrid Journal   (Followers: 3, SJR: 0.2, h-index: 4)
Advances in Polymer Science     Hybrid Journal   (Followers: 41, SJR: 0.637, h-index: 89)
Advances in Therapy     Hybrid Journal   (Followers: 5, SJR: 0.79, h-index: 44)
Aegean Review of the Law of the Sea and Maritime Law     Hybrid Journal   (Followers: 7)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2, SJR: 0.882, h-index: 23)
Aerobiologia     Hybrid Journal   (Followers: 2, SJR: 0.511, h-index: 36)
Aesthetic Plastic Surgery     Hybrid Journal   (Followers: 9, SJR: 0.821, h-index: 49)
African Archaeological Review     Hybrid Journal   (Followers: 16, SJR: 0.612, h-index: 24)
Afrika Matematika     Hybrid Journal   (Followers: 1, SJR: 0.248, h-index: 6)
AGE     Hybrid Journal   (Followers: 7, SJR: 1.358, h-index: 33)
Ageing Intl.     Hybrid Journal   (Followers: 7, SJR: 0.337, h-index: 10)
Aggiornamenti CIO     Hybrid Journal   (Followers: 1)
Aging Clinical and Experimental Research     Hybrid Journal   (Followers: 3, SJR: 0.529, h-index: 55)
Agricultural Research     Hybrid Journal   (Followers: 3)
Agriculture and Human Values     Hybrid Journal   (Followers: 13, SJR: 1.197, h-index: 49)
Agroforestry Systems     Hybrid Journal   (Followers: 19, SJR: 0.64, h-index: 56)
Agronomy for Sustainable Development     Hybrid Journal   (Followers: 10, SJR: 1.732, h-index: 59)
AI & Society     Hybrid Journal   (Followers: 6, SJR: 0.171, h-index: 19)
AIDS and Behavior     Hybrid Journal   (Followers: 13, SJR: 2.006, h-index: 71)
Air Quality, Atmosphere & Health     Hybrid Journal   (Followers: 4, SJR: 0.706, h-index: 19)
Akupunktur & Aurikulomedizin     Full-text available via subscription   (Followers: 1)
Algebra and Logic     Hybrid Journal   (Followers: 4, SJR: 0.566, h-index: 18)
Algebra Universalis     Hybrid Journal   (Followers: 2, SJR: 0.388, h-index: 22)
Algebras and Representation Theory     Hybrid Journal   (Followers: 1, SJR: 0.868, h-index: 20)
Algorithmica     Hybrid Journal   (Followers: 8, SJR: 0.898, h-index: 56)
Allergo J.     Full-text available via subscription   (Followers: 1, SJR: 0.183, h-index: 20)
Allergo J. Intl.     Hybrid Journal   (Followers: 2)
Alpine Botany     Hybrid Journal   (Followers: 5, SJR: 0.729, h-index: 20)
ALTEX : Alternatives to Animal Experimentation     Open Access   (Followers: 3, SJR: 1.392, h-index: 32)
AMBIO     Hybrid Journal   (Followers: 15, SJR: 1.094, h-index: 87)
American J. of Cardiovascular Drugs     Hybrid Journal   (Followers: 15, SJR: 0.864, h-index: 39)
American J. of Community Psychology     Hybrid Journal   (Followers: 25, SJR: 1.237, h-index: 83)
American J. of Criminal Justice     Hybrid Journal   (Followers: 8, SJR: 0.634, h-index: 13)
American J. of Cultural Sociology     Hybrid Journal   (Followers: 15, SJR: 0.283, h-index: 3)
American J. of Dance Therapy     Hybrid Journal   (Followers: 4, SJR: 0.175, h-index: 13)
American J. of Potato Research     Hybrid Journal   (Followers: 2, SJR: 0.558, h-index: 35)
American J. of Psychoanalysis     Hybrid Journal   (Followers: 22, SJR: 0.293, h-index: 13)
American Sociologist     Hybrid Journal   (Followers: 14, SJR: 0.18, h-index: 13)
Amino Acids     Hybrid Journal   (Followers: 8, SJR: 1.362, h-index: 83)
AMS Review     Partially Free   (Followers: 4)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 7, SJR: 0.21, h-index: 37)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 3, SJR: 0.665, h-index: 7)
Analysis in Theory and Applications     Hybrid Journal   (Followers: 1)
Analysis of Verbal Behavior     Hybrid Journal   (Followers: 5)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 30, SJR: 1.096, h-index: 123)
Anatomical Science Intl.     Hybrid Journal   (Followers: 2, SJR: 0.301, h-index: 26)
Angewandte Schmerztherapie und Palliativmedizin     Hybrid Journal  
Angiogenesis     Hybrid Journal   (Followers: 3, SJR: 2.212, h-index: 69)
Animal Cognition     Hybrid Journal   (Followers: 16, SJR: 1.122, h-index: 55)
Annales françaises de médecine d'urgence     Hybrid Journal   (Followers: 1, SJR: 0.156, h-index: 4)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3, SJR: 1.377, h-index: 32)
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4)
Annali dell'Universita di Ferrara     Hybrid Journal   (SJR: 0.504, h-index: 14)
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1, SJR: 1.167, h-index: 26)
Annals of Behavioral Medicine     Hybrid Journal   (Followers: 12, SJR: 2.112, h-index: 98)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18, SJR: 1.182, h-index: 94)
Annals of Combinatorics     Hybrid Journal   (Followers: 3, SJR: 0.849, h-index: 15)
Annals of Data Science     Hybrid Journal   (Followers: 11)
Annals of Dyslexia     Hybrid Journal   (Followers: 10, SJR: 0.857, h-index: 40)
Annals of Finance     Hybrid Journal   (Followers: 28, SJR: 0.686, h-index: 14)
Annals of Forest Science     Hybrid Journal   (Followers: 6, SJR: 0.929, h-index: 57)
Annals of Global Analysis and Geometry     Hybrid Journal   (Followers: 1, SJR: 1.136, h-index: 23)
Annals of Hematology     Hybrid Journal   (Followers: 15, SJR: 1.117, h-index: 62)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 8, SJR: 0.593, h-index: 42)
Annals of Microbiology     Hybrid Journal   (Followers: 10, SJR: 0.402, h-index: 26)
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 5, SJR: 0.68, h-index: 45)
Annals of Operations Research     Hybrid Journal   (Followers: 10, SJR: 1.186, h-index: 78)
Annals of Ophthalmology     Hybrid Journal   (Followers: 12)
Annals of Regional Science     Hybrid Journal   (Followers: 8, SJR: 0.405, h-index: 42)
Annals of Software Engineering     Hybrid Journal   (Followers: 13)
Annals of Solid and Structural Mechanics     Hybrid Journal   (Followers: 10, SJR: 0.553, h-index: 8)
Annals of Surgical Oncology     Hybrid Journal   (Followers: 14, SJR: 1.902, h-index: 127)
Annals of Telecommunications     Hybrid Journal   (Followers: 7, SJR: 0.315, h-index: 25)
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.931, h-index: 31)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5, SJR: 0.992, h-index: 87)
Apidologie     Hybrid Journal   (Followers: 4, SJR: 1.14, h-index: 57)
APOPTOSIS     Hybrid Journal   (Followers: 8, SJR: 1.554, h-index: 87)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2, SJR: 0.354, h-index: 27)
Applications of Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.274, h-index: 20)
Applied Biochemistry and Biotechnology     Hybrid Journal   (Followers: 42, SJR: 0.575, h-index: 80)
Applied Biochemistry and Microbiology     Hybrid Journal   (Followers: 16, SJR: 0.267, h-index: 26)
Applied Cancer Research     Open Access  
Applied Categorical Structures     Hybrid Journal   (Followers: 2, SJR: 0.361, h-index: 21)
Applied Composite Materials     Hybrid Journal   (Followers: 48, SJR: 0.705, h-index: 35)
Applied Entomology and Zoology     Partially Free   (Followers: 3, SJR: 0.554, h-index: 34)
Applied Geomatics     Hybrid Journal   (Followers: 4, SJR: 0.323, h-index: 9)
Applied Geophysics     Hybrid Journal   (Followers: 8, SJR: 0.541, h-index: 13)
Applied Intelligence     Hybrid Journal   (Followers: 11, SJR: 0.777, h-index: 43)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4, SJR: 0.358, h-index: 34)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 4, SJR: 0.955, h-index: 33)
Applied Mathematics - A J. of Chinese Universities     Hybrid Journal   (SJR: 0.275, h-index: 8)
Applied Mathematics and Mechanics     Hybrid Journal   (Followers: 5, SJR: 0.37, h-index: 26)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 61, SJR: 1.262, h-index: 161)
Applied Physics A     Hybrid Journal   (Followers: 7, SJR: 0.535, h-index: 121)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 23, SJR: 0.983, h-index: 104)
Applied Psychophysiology and Biofeedback     Hybrid Journal   (Followers: 8, SJR: 0.677, h-index: 47)
Applied Research in Quality of Life     Hybrid Journal   (Followers: 11, SJR: 0.288, h-index: 15)
Applied Solar Energy     Hybrid Journal   (Followers: 17, SJR: 0.251, h-index: 6)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 5, SJR: 0.351, h-index: 9)
Aquaculture Intl.     Hybrid Journal   (Followers: 22, SJR: 0.613, h-index: 40)
Aquarium Sciences and Conservation     Hybrid Journal   (Followers: 1)
Aquatic Ecology     Hybrid Journal   (Followers: 32, SJR: 0.646, h-index: 44)
Aquatic Geochemistry     Hybrid Journal   (Followers: 4, SJR: 0.764, h-index: 39)
Aquatic Sciences     Hybrid Journal   (Followers: 13, SJR: 1.172, h-index: 53)
Arabian J. for Science and Engineering     Hybrid Journal   (Followers: 5, SJR: 0.345, h-index: 20)
Arabian J. of Geosciences     Hybrid Journal   (Followers: 1, SJR: 0.417, h-index: 16)
Archaeological and Anthropological Sciences     Hybrid Journal   (Followers: 23, SJR: 1.056, h-index: 15)
Archaeologies     Hybrid Journal   (Followers: 12, SJR: 0.397, h-index: 13)
Archiv der Mathematik     Hybrid Journal   (Followers: 1, SJR: 0.597, h-index: 29)
Archival Science     Hybrid Journal   (Followers: 56, SJR: 0.804, h-index: 22)
Archive for History of Exact Sciences     Hybrid Journal   (Followers: 8, SJR: 0.28, h-index: 15)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 1, SJR: 0.946, h-index: 23)
Archive for Rational Mechanics and Analysis     Hybrid Journal   (SJR: 4.091, h-index: 66)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 5, SJR: 0.865, h-index: 40)
Archives and Museum Informatics     Hybrid Journal   (Followers: 132)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4, SJR: 2.841, h-index: 40)
Archives of Dermatological Research     Hybrid Journal   (Followers: 7, SJR: 0.9, h-index: 65)
Archives of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 12, SJR: 0.846, h-index: 84)
Archives of Gynecology and Obstetrics     Hybrid Journal   (Followers: 17, SJR: 0.695, h-index: 47)
Archives of Microbiology     Hybrid Journal   (Followers: 8, SJR: 0.702, h-index: 85)
Archives of Orthopaedic and Trauma Surgery     Hybrid Journal   (Followers: 8, SJR: 1.039, h-index: 56)
Archives of Osteoporosis     Hybrid Journal   (Followers: 2, SJR: 1.092, h-index: 13)
Archives of Sexual Behavior     Hybrid Journal   (Followers: 10, SJR: 1.198, h-index: 74)
Archives of Toxicology     Hybrid Journal   (Followers: 17, SJR: 1.595, h-index: 76)
Archives of Virology     Hybrid Journal   (Followers: 5, SJR: 1.086, h-index: 90)
Archives of Women's Mental Health     Hybrid Journal   (Followers: 14, SJR: 1.264, h-index: 50)
Archivio di Ortopedia e Reumatologia     Hybrid Journal  
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2, SJR: 1.2, h-index: 42)
ArgoSpine News & J.     Hybrid Journal   (SJR: 0.102, h-index: 3)
Argumentation     Hybrid Journal   (Followers: 5, SJR: 0.295, h-index: 18)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
Arkiv för Matematik     Hybrid Journal   (Followers: 1, SJR: 0.948, h-index: 22)
Arnold Mathematical J.     Hybrid Journal   (Followers: 1)
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 2, SJR: 0.797, h-index: 17)
Arthroskopie     Hybrid Journal   (Followers: 1, SJR: 0.145, h-index: 8)
Artificial Intelligence and Law     Hybrid Journal   (Followers: 11, SJR: 0.288, h-index: 25)
Artificial Intelligence Review     Hybrid Journal   (Followers: 14, SJR: 0.948, h-index: 48)
Artificial Life and Robotics     Hybrid Journal   (Followers: 8, SJR: 0.231, h-index: 14)
Asia Europe J.     Hybrid Journal   (Followers: 5, SJR: 0.247, h-index: 9)
Asia Pacific Education Review     Hybrid Journal   (Followers: 12, SJR: 0.371, h-index: 17)
Asia Pacific J. of Management     Hybrid Journal   (Followers: 16, SJR: 1.676, h-index: 50)
Asia-Pacific Education Researcher     Hybrid Journal   (Followers: 12, SJR: 0.353, h-index: 13)
Asia-Pacific Financial Markets     Hybrid Journal   (Followers: 2, SJR: 0.19, h-index: 15)
Asia-Pacific J. of Atmospheric Sciences     Hybrid Journal   (Followers: 20, SJR: 1.006, h-index: 14)
Asian Business & Management     Hybrid Journal   (Followers: 8, SJR: 0.41, h-index: 10)
Asian J. of Business Ethics     Hybrid Journal   (Followers: 7)
Asian J. of Criminology     Hybrid Journal   (Followers: 5, SJR: 0.263, h-index: 8)
AStA Advances in Statistical Analysis     Hybrid Journal   (Followers: 2, SJR: 0.681, h-index: 15)
AStA Wirtschafts- und Sozialstatistisches Archiv     Hybrid Journal   (Followers: 5, SJR: 0.195, h-index: 5)
ästhetische dermatologie & kosmetologie     Full-text available via subscription  

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Journal Cover Applied Entomology and Zoology
  [SJR: 0.554]   [H-I: 34]   [3 followers]  Follow
    
   Partially Free Journal Partially Free Journal
   ISSN (Print) 0003-6862 - ISSN (Online) 1347-605X
   Published by Springer-Verlag Homepage  [2355 journals]
  • Insecticidal activities of monoterpenes and phenylpropenes against
           Sitophilus oryzae and their inhibitory effects on acetylcholinesterase and
           adenosine triphosphatases
    • Authors: Mona M. G. Saad; Hamdy K. Abou-Taleb; Samir A. M. Abdelgaleil
      Abstract: Abstract In the present study, six monoterpenes [(−)-citronellal, p-cymene, (−)-menthone, α-pinene, α-terpinene, and (−)-terpinen-4-ol] and two phenylpropenes [trans-cinnamaldehyde and eugenol] were evaluated for their contact and fumigant toxicities against Sitophilus oryzae adults. The effects of these compounds on the mortality of S. oryzae adults in stored wheat and their inhibitory effects on acetylcholinesterase (AChE) and adenosine triphosphatases (ATPases) were examined. The tested compounds showed varying degrees of contact toxicity, with trans-cinnamaldehyde (LC50 = 0.01 mg/cm2) being the most potent compound, followed by (−)-menthone (LC50 = 0.013 mg/cm2) and eugenol (LC50 = 0.015 mg/cm2). In a fumigant toxicity assay, the monoterpenes α-terpinene, p-cymene, and (−)-menthone showed the highest toxicities (LC50 = 50.79, 52.37, and 54.08 μl/L air, respectively). Trans-cinnamaldehyde, (−)-citronellal, and eugenol were the least toxic (LC50 > 100 μl/L air). In general, the oxygenated compounds exhibited high contact toxicities while the hydrocarbon compounds exhibited high fumigant toxicities. When tested for their insecticidal activities against S. oryzae in stored wheat, trans-cinnamaldehyde was found to be the most potent compound, with 73.9% mortality at an application rate of 0.5 g/kg and complete mortality (100%) at 1 and 5 g/kg after 1 week of treatment. All of the tested compounds showed AChE inhibition, although (−)-citronellal and trans-cinnamaldehyde presented the strongest enzyme inhibition, with IC50 values of 18.40 and 18.93 mM, respectively. On the other hand, (−)-terpinene-4-ol exhibited the highest inhibition of ATPases, followed by α-pinene and α-terpinene.
      PubDate: 2018-01-13
      DOI: 10.1007/s13355-017-0532-x
       
  • Correction to: Small-scale rearing of the black soldier fly, Hermetia
           illucens (Diptera: Stratiomyidae), in the laboratory: low-cost and
           year-round rearing
    • Authors: Satoshi Nakamura; Ryoko T. Ichiki; Masami Shimoda; Shinsuke Morioka
      Abstract: Abstract Unfortunately, the Y axis (No. of clutches laid/cage) of was published incorrectly in the original publication of the article. The correct version of figure is given below.
      PubDate: 2018-01-06
      DOI: 10.1007/s13355-017-0542-8
       
  • A simple method of monitoring for cypermethrin resistance in Thrips tabaci
           (Thysanoptera: Thripidae) using agar-coated glass pipettes
    • Authors: Misato Aizawa; Kiyohiro Nakai; Takeo Watanabe; Akemi Kumano; Kumie Tamagaki; Shoji Sonoda
      Abstract: Abstract A simple plant-free method to monitor for cypermethrin resistance of Thrips tabaci Lindeman at 24 h after insect collection was developed, which utilizes an agar-coated glass pipette. In the laboratory, when cypermethrin-resistant and -susceptible insects were mixed in various ratios and subjected to the method, only resistant insects were detected as survivors. All survivors in the field bioassay were found to have a particular amino acid mutation (T929I) in the sodium channel. Results obtained in this study also showed that the method is affected by temperature, possibly because pyrethroid toxicity increases as the temperature decreases. This method could be used for the on-site monitoring of T. tabaci for cypermethrin resistance with careful temperature management after insect collection.
      PubDate: 2018-01-04
      DOI: 10.1007/s13355-017-0541-9
       
  • Feeding behaviors of rice-ear bugs, Trigonotylus caelestialium and
           Stenotus rubrovittatus (Hemiptera: Miridae), in response to starch and its
           related substances
    • Authors: Masatoshi Hori; Sachiyo Naito
      Abstract: Abstract We investigated the feeding behavior-stimulating properties of starch and related substances, namely, rice starch, soluble starch, amylopectin, and d-glucose, in the mirid bugs Trigonotylus caelestialium (Kirkaldy) and Stenotus rubrovittatus (Matsumura). Using an electrical penetration graph, feeding behaviors were roughly categorized into three distinct processes: test probing, ingestion, and resting. Rice starch strongly stimulated the feeding behavior of S. rubrovittatus at all concentrations tested (10–50%), prompting an increase in ingestion behavior and a decrease in resting behavior. Rice starch stimulated the feeding behavior of T. caelestialium at a concentration of 10%. Soluble starch also elicited feeding-stimulant activity in S. rubrovittatus at all concentrations tested (10–30%), but did not stimulate feeding behavior at any concentration tested in T. caelestialium. Amylopectin, a main component of rice starch, showed feeding-stimulant activity in S. rubrovittatus only at a concentration of 10%. In T. caelestialium, amylopectin did not stimulate ingestion, but did decrease resting behavior. d-Glucose, the building block of amylopectin, stimulated feeding behavior in S. rubrovittatus, leading to an increase in the duration and frequency of ingestion at concentrations of 10% and 10–20%, respectively. These findings indicate that starch is one of the main feeding stimulants for rice-ear bugs, particularly S. rubrovittatus.
      PubDate: 2017-12-22
      DOI: 10.1007/s13355-017-0540-x
       
  • Entomopathogenic nematode distribution and edaphoclimatic conditions in
           the Cerrado of Minas Gerais, Brazil
    • Authors: Vanessa Andaló; Jéssica Mieko; Fábio Janoni Carvalho; Gleice Aparecida de Assis; Lucas Silva de Faria; Franscinely Aparecida de Assis; Ronaldo Antônio dos Santos; Francielle Rosa
      Abstract: Abstract Based on the high diversity of Brazilian fauna and flora, edaphoclimatic conditions in the Cerrado of Minas Gerais, and the situation of utilization of EPNs in Brazil, a survey was conducted in order to relate the presence of these organisms with the physical and chemical attributes of the soil, combined with precipitation. To this end, soil samples were collected in areas with diversified vegetation types in Monte Carmelo, MG, at Juliana Farm. The samples were obtained every 15 days for 6 months. From each spot, soil samples (about 500 g) were collected for soil moisture characterization, nematode isolation and determination of pH, organic matter, potassium (K), calcium (Ca), magnesium (Mg), phosphorus (P), potential acidity (H + Al) and precipitation data (mm). Three populations of entomopathogenic nematodes of the Heterorhabditis amazonensis species were isolated in Cerrado stricto sensu and Gallery forest areas. The occurrence H. amazonensis could not be considered restricted to specific soil condition, as organic matter, humidity, pH, Ca, K, Mg and H + Al, especially considering the organic matter and K values, which had variable levels between the places of collection. The p values of the positive soil samples were at a lower level than the mean of the Gallery forest and Cerrado, and at the same level as maize and pasture area. The soil moisture in the Cerrado area increased with the higher values of precipitation; however, in the Gallery forest area this association was not observed. Also, the nematodes were isolated when the temperature began to decrease.
      PubDate: 2017-12-22
      DOI: 10.1007/s13355-017-0538-4
       
  • Identification of the genes in tea leafhopper, Empoasca onukii (Hemiptera:
           Cicadellidae), that encode odorant-binding proteins and chemosensory
           proteins using transcriptome analyses of insect heads
    • Authors: Lei Bian; Zhao-Qun Li; Long Ma; Xiao-Ming Cai; Zong-Xiu Luo; Zong-Mao Chen
      Abstract: Abstract Empoasca onukii Matsuda is a serious pest affecting tea production throughout China. Chemosensory behaviors are important in the life cycle of E. onukii, especially for detecting plant odorants during host localizations. In this process, odorant-binding proteins (OBPs) and chemosensory proteins (CSPs) mediate the initial biochemical recognition steps. We used a transcriptomics-based approach to identify 40 putative E. onukii OBP genes and 11 CSP genes. The encoded OBPs comprised 19 classic OBPs and 21 plus-C OBPs. A phylogenetic analysis revealed that the plus-C OBPs formed monophyletic groups, and most of the classic OBPs and CSPs were distributed among other orthologous groups. Additionally, there were significant differences between the sexes regarding the expression of five OBP genes and two CSP genes. Moreover, 36 OBP genes and six CSP genes were most highly expressed in the heads. Two CSP genes were most highly expressed in the thoraxes, while four OBP genes and three CSP genes exhibited high expression levels in the heads and thoraxes. Our data may represent a valuable resource for future functional characterizations of the E. onukii OBPs and CSPs.
      PubDate: 2017-12-22
      DOI: 10.1007/s13355-017-0533-9
       
  • Effects of ambient temperature and the mud snail Cipangopaludina chinensis
           laeta (Architaenioglossa: Viviparidae) on performance of rice plants
    • Authors: Andreas Hendracipta Kurniawan; Satoru Sato; Hironori Yasuda
      Abstract: Abstract A factorial experiment was conducted in 2015 to assess the effects of ambient temperature and the presence of the mud snail, Cipangopaludina chinensis laeta (Martens) (Architaenioglossa: Viviparidae), on rice plant performance. The presence of mud snails resulted in significantly increased rice plant height and SPAD value (reflecting leaf color), although the number of tillers was not significantly affected. The effects of temperature (high vs. normal) on rice plant performance were examined in experiments inside and outside the greenhouse. The average temperature of the water in experimental containers with rice seedlings showed that the temperature inside the greenhouse tended to be higher than that outside. The results suggest that the effects of temperature differed among plant traits; plants grew taller but had fewer tillers when the rice was grown at a high temperature, whereas SPAD was not significantly affected. A significantly greater number of roots were observed on the soil surface when snails were present. In general, the mud snails produced less excreta at a high temperature than a normal temperature. The results of this study indicate that ambient temperature had both a direct influence on rice plant performance and an indirect influence through the activity of the mud snails.
      PubDate: 2017-12-19
      DOI: 10.1007/s13355-017-0539-3
       
  • Appropriate number of inoculated eggs for mass-rearing the West Indian
           sweet potato weevil, Euscepes postfasciatus (Coleoptera: Curculionidae)
    • Authors: Chihiro Himuro; Norikuni Kumano; Atsushi Honma; Yusuke Ikegawa; Tsuyoshi Ohishi
      Abstract: Abstract It is necessary to establish an economical mass-rearing system for the West Indian sweet potato weevil Euscepes postfasciatus (Fairmaire) so that large numbers can be created for use in the sterile insect technique (SIT) to control wild infestations. Both the quality of offspring and the number of adult weevils produced are important. As an adult female with a dry weight of less than 1.4 mg has an extremely low rate of production of offspring, we investigated the effect of an inoculated dose of egg suspension on both yield rate and body size, in order to determine the appropriate dose to attain the maximum yield of productive females. The number of emerged weevils increased as the inoculated dose of egg suspension increased. In brief, both yield rate and female body size significantly decreased as the inoculated dose of egg suspension increased, perhaps as a result of density effects. We conclude that the appropriate dose of inoculated egg suspension to attain the maximum yield from productive females of E. postfasciatus in the current mass-rearing system is 3 mL (containing approximately 450 eggs) per rearing container.
      PubDate: 2017-12-14
      DOI: 10.1007/s13355-017-0536-6
       
  • In the presence of red light, cucumber and possibly other host plants lose
           their attractability to the melon thrips Thrips palmi (Thysanoptera:
           Thripidae)
    • Authors: Mika Murata; Takahiko Hariyama; Yumi Yamahama; Mina Toyama; Izumi Ohta
      Abstract: Abstract The melon thrips, Thrips palmi Karny (Thysanoptera: Thripidae), is a serious agricultural pest of many crops. Previous studies have shown that red light decreases the number of Thrips palmi in greenhouses. In order to understand how red light affects T. palmi, we examined the behavioral responses to host plants that were irradiated with a red light-emitting diode panel (660 nm) in an environment with natural or fluorescent (normal-white) light. When T. palmi were allowed to move freely around in the experimental arena, we found that fewer individuals were attracted to plants irradiated by red light than to plants under normal light illumination. We then used a sticky trap of green coloration to exclude olfactory and visual stimuli associated with the host plants in order to test binary choice behavior in T. palmi. The number of thrips attracted to the green sticky trap irradiated with red light was approximately half of that without red light irradiation. This is the first study to show that an addition of red light can change the behavior of insects, leading to an avoidance of green targets in an environment of normal illumination.
      PubDate: 2017-12-14
      DOI: 10.1007/s13355-017-0537-5
       
  • Larvae of the exotic predatory ladybird Platynaspidius maculosus
           (Coleoptera: Coccinellidae) on citrus trees: prey aphid species and
           behavioral interactions with aphid-attending ants in Japan
    • Authors: Shuji Kaneko
      Abstract: Abstract An aphidophagous ladybird, Platynaspidius maculosus (Weise) (Coleoptera: Coccinellidae), is originally distributed in China, Taiwan, and Vietnam. The ladybird has recently intruded into the southern and central parts of Japan. The present study found that the larvae of this ladybird preyed on three aphid species, Aphis spiraecola, Aphis gossypii, and Toxoptera citricidus (all Hemiptera: Aphididae), feeding on young shoots of various Citrus species in August to early October in Shizuoka Prefecture, central Japan. Laboratory rearing of the sampled larvae confirmed that the larvae completed their development (adult emergence) by consuming each of the three aphid species. The ladybird larvae were observed foraging in aphid colonies attended by one of the four ants, Lasius japonicus, Pristomyrmex punctatus, Formica japonica, and Camponotus japonicus (all Hymenoptera: Formicidae). Field observations revealed that the foraging/feeding larvae were almost completely ignored by honeydew-collecting ants even when they physically contacted each other. Thus, in Japan, the larvae of the exotic ladybird exploit colonies of the three aphid species attended by one of the four ant species on many Citrus species. On the basis of the results, I discuss the possibility of the ladybird’s reproduction on citrus trees in Japan, probable adaptations of the ladybird larvae to aphid-attending ants, and potential impacts of the ladybird on native insect enemies attacking ant-attended aphids on citrus.
      PubDate: 2017-12-06
      DOI: 10.1007/s13355-017-0531-y
       
  • Monitoring thrips species with yellow sticky traps in astringent persimmon
           orchards in Korea
    • Authors: Md. Abdul Alim; Janghoon Song; Ho-Jin Seo; Jang-Jeon Choi
      Abstract: Abstract Thrips are one of the insect pests of persimmon (Diospyros kaki Thunb.) in the major production areas of astringent persimmon in Korea. We surveyed astringent persimmon orchards in the Damyang, Sangju and Cheongdo regions of Korea to determine thrips species composition and abundance. Orchards sprayed with either organic or conventional pesticides were sampled over the course of one flowering season, using yellow sticky traps to determine if this is a suitable method for monitoring thrips populations, and to determine thrips species composition and abundance. Eight thrips species were captured on yellow sticky traps in both the tree canopy and ground cover: Ponticulothrips diospyrosi Haga et Okajima, Scirtothrips dorsalis (Hood), Frankliniella occidentalis (Pergande), F. intonsa (Trybom), Thrips tabaci (Lindeman), T. hawaiiensis (Morgan), T. coloratus (Schmutz) and T. palmi (Karny). In all regions, F. occidentalis and F. intonsa dominated in both organic and conventional orchards. S. dorsalis, F. occidentalis, F. intonsa and T. hawaiiensis were found in persimmon flowers, with S. dorsalis the dominant thrips. Significantly more S. dorsalis were captured from flowers in the lower and middle canopy than in flowers from the upper canopy. Fruit damage was also significantly higher in fruit from the lower canopy than in fruit from the middle and upper canopy.
      PubDate: 2017-12-05
      DOI: 10.1007/s13355-017-0530-z
       
  • Host plants influence female oviposition and larval performance in West
           Indian sweet potato weevils Euscepes postfasciatus (Coleoptera:
           Curculionidae)
    • Authors: Kaori Tsurui-Sato; Norikuni Kumano; Atsushi Honma; Takashi Matsuyama; Dai Haraguchi; Kiyohito Teruya; Tetsuya Toyosato; Haruki Tatsuta
      Abstract: Abstract Euscepes postfasciatus (Fairmaire) is an invasive pest of the sweet potato (Ipomoea batatas) and is also parasitic to other wild host plants of the Ipomoea genus. The population density of E. postfasciatus is sometimes greater in Ipomoea pes-caprae L. than in Ipomoea indica (Burm. f.). We investigated the desirability of I. pes-caprae as a host plant for E. postfasciatus in terms of reproductive and developmental potential. Females laid fewer eggs on I. pes-caprae, and the eclosion of their larvae was delayed compared with on I. indica. Furthermore, the larval growth rate was slower on I. pes-caprae than on I. indica. These results suggest that I. pes-caprae is not always the preferred host for egg laying and growth rate in the early developmental stages. However, the larval survival rate after the initial period of development was markedly better on I. pes-caprae than on I. indica. The present simulation study demonstrated that the population density of E. postfasciatus on I. pes-caprae overwhelmed that on I. indica over generations. Comparing the two wild host plant species, I. pes-caprae outweighs I. indica with respect to total population growth, but reproduction on I. indica may be advantageous for the colonization of the new habitat.
      PubDate: 2017-11-30
      DOI: 10.1007/s13355-017-0535-7
       
  • Potency of the mosquitocidal Cry46Ab toxin produced using a 4AaCter-tag,
           which facilitates formation of protein inclusion bodies in Escherichia
           coli
    • Authors: Tomoaki Okazaki; Junya Ichinose; So Takebe; Toru Ide; Tohru Hayakawa
      Abstract: Abstract A Cry46Ab toxin derived from Bacillus thuringiensis strain TK-E6 shows mosquitocidal activity against Culex pipiens pallens Coquillett (Diptera: Culicidae) larvae as well as preferential cytotoxicity against human cancer cells. In B. thuringiensis cells, Cry46Ab is produced and accumulates as a protein crystal that is processed into the active 29-kDa toxin upon solubilization in the alkaline environment of the insect midgut. The Cry46Ab protoxin is 30 kDa, and is therefore thought to require an accessory protein such as P20 and/or ORF2 for efficient crystal formation. In the present study, the potency of the 4AaCter-tag was investigated for the production of alkali-soluble inclusion bodies of recombinant Cry46Ab in Escherichia coli. The 4AaCter-tag is a polypeptide derived from the C-terminal region of the B. thuringiensis Cry4Aa toxin and facilitates the formation of alkali-soluble protein inclusion bodies in E. coli. Fusion with the 4AaCter-tag enhanced both Cry46Ab production and the formation of Cry46Ab inclusion bodies. In addition, upon optimization of protein expression procedures, the Cry46Ab–4AaCter inclusion bodies showed mosquitocidal activity and stability in aqueous environments comparable to Cry46Ab without the 4AaCter-tag. Our study suggests that use of the 4AaCter-tag is a straightforward approach for preparing formulations of smaller-sized Cry toxins such as Cry46Ab in E. coli.
      PubDate: 2017-11-21
      DOI: 10.1007/s13355-017-0529-5
       
  • Development and validation of microsatellite markers for the tiny
           dragonfly, Nannophya pygmaea (Odonata: Libellulidae), which is endangered
           in South Korea
    • Authors: Min Jee Kim; Ah Rha Wang; Sung Soo Kim; Junghwa An; Iksoo Kim
      Abstract: Abstract The tiny dragonfly, Nannophya pygmaea (Odonata: Libellulidae), is listed as a second-degree endangered wild animal in South Korea. The application of molecular markers to assess genetic diversity and population relationships can provide information necessary to establish an effective conservation strategy. In this study, we developed 12 microsatellite markers specific to N. pygmaea using the NextSeq 500 platform. Forty individuals of N. pygmaea collected from three currently known localities in South Korea were genotyped to validate these markers and to preliminarily assess population genetic characteristics. The observed number of alleles, observed heterozygosity, and expected heterozygosity at a locus ranged from 2 to 9, 0.421–1.0, and 0.508–0.766 in a population with the largest sample size (20 individuals), respectively, thereby validating the suitability of the markers for population analysis. Five of 12 loci showed significant deviation from the Hardy–Weinberg equilibrium in the population. Our preliminary data indicate an absence of inbreeding in all populations and an absence of obvious genetic difference. The microsatellite markers developed in this study will be useful for studying the population genetics of N. pygmaea collected from other regions worldwide, including additional sites in South Korea.
      PubDate: 2017-11-11
      DOI: 10.1007/s13355-017-0528-6
       
  • Molecular characterization of a NADPH–cytochrome P450 reductase gene
           from the rice leaffolder, Cnaphalocrocis medinalis (Lepidoptera:
           Pyralidae)
    • Authors: Yu-Xing Zhang; Shi-Guang Li; Xiang-Jun Rao; Su Liu
      Abstract: Abstract NADPH–cytochrome P450 reductase (CPR) is the most important redox partner of various cytochrome P450 monooxygenases (P450s) and plays a central role in multiple metabolic reactions. In this paper, a full-length cDNA encoding CPR (designated as CmCPR) was characterized in the rice leaffolder, Cnaphalocrocis medinalis (Guenée), a serious lepidopteran rice pest. The complete open reading frame of CmCPR was 2046 bp, encoding a protein consists of 681 amino acid residues. The secondary structure of CmCPR protein showed marked features of classical CPRs such as N-terminal anchor, conserved functional domains, and catalytic residues. Phylogenic analysis showed that CmCPR was clustered together with CPRs from other lepidopteran species. Recombinant CmCPR protein was expressed in E. coli, and the activity and kinetic parameters of the enzyme were determined. Quantitative reverse transcription-PCR showed that the highest expression levels of CmCPR were detected in fourth- and fifth-instar larvae, and the transcriptional level in larval midgut tended to be higher than those in other tissues. Exposure to sublethal concentrations of three insecticides, abamectin, chlorpyrifos, and chlorantraniliprole, led to upregulated expression of CmCPR and several P450 genes. This work is the first report of molecular characterization of CPR gene in Cn. medinalis.
      PubDate: 2017-11-07
      DOI: 10.1007/s13355-017-0523-y
       
  • Spittlebugs (Hemiptera: Cercopidae) and their host plants: a strategy for
           pasture diversification
    • Authors: R. Alvarenga; Alexander M. Auad; Jair C. Moraes; Sandra E. B. Silva; Brunno S. Rodrigues; Giani B. Silva
      Abstract: Abstract Information about the biology of spittlebugs on different species of forage is necessary for the development of tactics for their control, and is also essential for evaluating, selecting and launching new forage cultivars. The aims of this study were to compare the nutritional suitability of different forage species–Brachiaria ruziziensis (Congo grass), Pennisetum purpureum (elephant grass), Panicum maximum (Guinea grass), and Cynodon dactylon (Bermuda grass)–for the spittlebug species Mahanarva spectabilis (Distant) (Hemiptera: Cercopidae), Deois schach (Fabricius) (Hemiptera: Cercopidae) and Notozulia entreriana (Berg) (Hemiptera: Cercopidae), and to evaluate the performance of each spittlebug species on forage monocultures. B. ruziziensis was the most suitable host plant for D. schach. Since N. entreriana did not show differences in the evaluated parameters, it was not possible to determine its ideal forage species. For M. spectabilis, P. purpureum was the most suitable forage species. The evaluation of the performance of the different spittlebugs on a single forage species also showed which spittlebugs are a problem. M. spectabilis and D. schach developed better on a monoculture of B. ruziziensis. M. spectabilis was a major problem when it fed on P. purpureum, but on C. dactylon and P. maximum, none of the spittlebugs developed properly, indicating that these plants are less suitable for them. These results suggest that the forage diversification of pastures may be a strategy for the integrated management of spittlebugs.
      PubDate: 2017-10-05
      DOI: 10.1007/s13355-017-0521-0
       
  • Synchrony in the hatching of eggs in the desert locust Schistocerca
           gregaria (Orthoptera: Acrididae): egg condition influences hatching time
           in the laboratory and under simulated field temperatures
    • Abstract: Abstract This study examined the time of hatching of the desert locust Schistocerca gregaria Forskål (Orthoptera: Acrididae) in the laboratory to test the effect of eggs within a pod versus individualized eggs. The pod organization of eggs is thought to play a role in controlling hatching time and to facilitate synchronous hatching at constant temperatures. In the present study, we examined the hatching times of eggs in a pod and individualized eggs under 24-h thermocycles and simulated field temperatures. We tested two patterns of thermocycles consisting of a 12-h thermoperiod (35 or 30 °C) and 12-h cryoperiod (low temperature period; 30 or 25 °C), and two patterns of field temperatures observed in a natural habitat, Mauritania, in May and September. The majority of eggs hatched during low temperature periods in all patterns tested. In addition, the variances of hatching times for individualized eggs were significantly greater than for egg pods in which a clear peak of time of hatching was observed. We show that egg condition influences hatching time under thermocycles of constant and fluctuating temperatures in the laboratory, and may play a role in the adaptive time of hatching.
      PubDate: 2017-09-07
      DOI: 10.1007/s13355-017-0517-9
       
  • Biological studies of Agalliana ensigera (Hemiptera: Cicadellidae), a
           leafhopper associated with several crop diseases in South America
    • Authors: Tomás Pérez Grosso; María Catalano; Luis Conci; Eduardo G. Virla
      Abstract: Abstract Agalliana ensigera Oman (Cicadellidae: Megophthalminae) occurs frequently in several crops and has been involved in the epidemiology, or at least mentioned, as a vector of several diseases. Its biology was unknown and its nymphs had not yet been described. Here, we provide information on behavioral and biological parameters including descriptions of its immature stages. A. ensigera was able to complete its entire life cycle on alfalfa. Eggs were laid individually beneath the epidermis, in the stem internodes, in either mature or young tissues. Females had a pre-ovipositional period of around 5 days, and the average duration of the egg stage was 11 days. The nymphal period ranged 14–31 days, with an average of 22 days. A period of high mortality was recognized from emergence to day 10. Adult longevity averaged 16.5 days, but some individuals survived up to 96 days. The sex ratio was about 1.2:1 females to males. Females lived longer than males. Data on behavior and new distributional records and host plants are also provided.
      PubDate: 2017-08-23
      DOI: 10.1007/s13355-017-0511-2
       
  • Non-destructive direct polymerase chain reaction (direct PCR) greatly
           facilitates molecular identification of spider mites (Acari:
           Tetranychidae)
    • Authors: Hironori Sakamoto; Tetsuo Gotoh
      Abstract: Abstract Spider mites (Acari: Tetranychidae) include serious agricultural pests and some species have spread globally as invasive species.. For this reason, rapid and simple identification of spider mite species is necessary for agricultural field and plant quarantine inspection. DNA sequence-based molecular techniques can rapidly identify spider mites. However, extracting DNA from minute invertebrates is difficult, expensive and time consuming. Here, we describe a polymerase chain reaction (PCR) technique in which the whole body of a spider mite adult is non-destructively soaked in PCR solution. The mite is then removed intact and can be used as a voucher specimen, leaving the PCR solution as the template and avoiding the need for a DNA extraction kit. For this study, we used six common spider mite species from four genera [Tetranychus urticae Koch (red form), Tetranychus kanzawai Kishida, Tetranychus parakanzawai Ehara, Oligonychus gotohi Ehara, Eotetranychus smithi Pritchard & Baker and Panonychus citri (McGregor)]. A portion of the mitochondrial cytochrome c oxidase subunit I (COI) gene was amplified with a universal primer pair from all individuals examined and sequenced. This method shortened the time for molecular identification from 9 to 5 h and eliminated the cost of commercial kits for DNA extraction [ca. 600 yen (~5.3 USD) per sample].
      PubDate: 2017-08-18
      DOI: 10.1007/s13355-017-0512-1
       
  • Short and flat grass preferred by adults of the endangered dragonfly
           Sympetrum pedemontanum elatum (Odonata: Libellulidae)
    • Authors: Wataru Higashikawa; Mayumi Yoshimura; Tsuyoshi Yagi; Kaoru Maeto
      Abstract: Abstract Sympetrum pedemontanum (Müller in Allioni) (Odonata: Libellulidae) is widely distributed across the Eurasian continent and its neighboring islands. However, the populations of its subspecies S. pedemontanum elatum (Selys) in Japan have been rapidly decreasing with the loss of habitats in rural and suburban areas since the 1970s. For the conservation of this subspecies, which is now listed as endangered in many prefectures, it is important to understand the habitat preferences of the adults. Previous studies indicate that adult males of this species tend to fly on the flat surface of rice paddy fields. Thus, we hypothesized that they preferred short and flat grass. Field experiments in the Sakasegawa River, Hyogo Prefecture, Japan, showed that adult S. p. elatum significantly preferred the trimmed grass of Phragmites japonicus to untreated shaggy grass, regardless of sex. Our results indicate the importance of grass management for the conservation of this species, not only in and around paddy fields but also in fluvial habitats, which are abundant in Japan.
      PubDate: 2017-08-09
      DOI: 10.1007/s13355-017-0514-z
       
 
 
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