A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  

        1 2        [Sort alphabetically]   [Restore default list]

  Subjects -> VETERINARY SCIENCE (Total: 225 journals)
Showing 1 - 63 of 63 Journals sorted by number of followers
Animal Behaviour     Hybrid Journal   (Followers: 154)
Journal of Veterinary Internal Medicine     Open Access   (Followers: 29)
Veterinary Record     Hybrid Journal   (Followers: 26)
Veterinary Surgery     Hybrid Journal   (Followers: 25)
Australian Veterinary Journal     Hybrid Journal   (Followers: 23)
Veterinary Clinics of North America: Small Animal Practice     Full-text available via subscription   (Followers: 22)
Journal of Small Animal Practice     Hybrid Journal   (Followers: 21)
Animal Nutrition     Open Access   (Followers: 21)
Journal of Veterinary Emergency and Critical Care     Hybrid Journal   (Followers: 20)
Equine Veterinary Journal     Hybrid Journal   (Followers: 19)
Veterinary Journal     Hybrid Journal   (Followers: 18)
Veterinary Pathology     Hybrid Journal   (Followers: 16)
Veterinary Anaesthesia and Analgesia     Hybrid Journal   (Followers: 16)
American Journal of Primatology     Hybrid Journal   (Followers: 15)
BMC Veterinary Research     Open Access   (Followers: 15)
Canadian Journal of Veterinary Research     Full-text available via subscription   (Followers: 14)
Journal of Equine Veterinary Science     Hybrid Journal   (Followers: 14)
New Zealand Veterinary Journal     Full-text available via subscription   (Followers: 13)
Veterinary and Comparative Oncology     Hybrid Journal   (Followers: 13)
Veterinary Radiology & Ultrasound     Hybrid Journal   (Followers: 13)
Anthrozoos : A Multidisciplinary Journal of The Interactions of People & Animals     Hybrid Journal   (Followers: 12)
Journal of Veterinary Diagnostic Investigation     Hybrid Journal   (Followers: 12)
Journal of Veterinary Medicine     Open Access   (Followers: 12)
Veterinary Immunology and Immunopathology     Hybrid Journal   (Followers: 11)
Research in Veterinary Science     Hybrid Journal   (Followers: 11)
Veterinary Clinics of North America: Equine Practice     Hybrid Journal   (Followers: 11)
Animals     Open Access   (Followers: 11)
Journal of Veterinary Medical Education     Partially Free   (Followers: 11)
Preventive Veterinary Medicine     Hybrid Journal   (Followers: 10)
Trends in Parasitology     Full-text available via subscription   (Followers: 10)
Veterinary Research     Open Access   (Followers: 10)
Equine Veterinary Education     Hybrid Journal   (Followers: 10)
Veterinary Ophthalmology     Hybrid Journal   (Followers: 9)
Veterinary Clinical Pathology     Hybrid Journal   (Followers: 9)
Companion Animal     Full-text available via subscription   (Followers: 8)
Veterinary Nurse     Full-text available via subscription   (Followers: 8)
American Journal of Animal and Veterinary Sciences     Open Access   (Followers: 8)
Veterinary Dermatology     Hybrid Journal   (Followers: 8)
Archives of Animal Nutrition     Hybrid Journal   (Followers: 8)
Veterinary Microbiology     Hybrid Journal   (Followers: 8)
Journal of Animal Physiology and Animal Nutrition     Hybrid Journal   (Followers: 7)
Journal of Veterinary Cardiology     Hybrid Journal   (Followers: 7)
Animal Reproduction Science     Hybrid Journal   (Followers: 7)
Animal Feed Science and Technology     Hybrid Journal   (Followers: 7)
Domestic Animal Endocrinology     Hybrid Journal   (Followers: 6)
International Journal of Veterinary Science and Medicine     Open Access   (Followers: 6)
Journal of Feline Medicine & Surgery     Hybrid Journal   (Followers: 6)
Veterinary Parasitology     Hybrid Journal   (Followers: 6)
African Journal of Wildlife Research     Full-text available via subscription   (Followers: 6)
Journal of Veterinary Pharmacology and Therapeutics     Hybrid Journal   (Followers: 6)
Journal of Research in Forestry, Wildlife and Environment     Open Access   (Followers: 5)
Journal of Veterinary Science & Technology     Open Access   (Followers: 5)
Veterinary Nursing Journal     Hybrid Journal   (Followers: 5)
Journal of Veterinary Science & Medical Diagnosis     Hybrid Journal   (Followers: 5)
Veterinary Medicine International     Open Access   (Followers: 5)
Research Journal of Veterinary Sciences     Open Access   (Followers: 5)
Veterinary Clinics of North America: Exotic Animal Practice     Full-text available via subscription   (Followers: 5)
Journal of Exotic Pet Medicine     Full-text available via subscription   (Followers: 5)
Topics in Companion Animal Medicine     Hybrid Journal   (Followers: 4)
Zoonoses and Public Health     Hybrid Journal   (Followers: 4)
Bangladesh Journal of Animal Science     Open Access   (Followers: 4)
Open Journal of Animal Sciences     Open Access   (Followers: 4)
Avian Pathology     Hybrid Journal   (Followers: 4)
Animal Health Research Reviews     Hybrid Journal   (Followers: 4)
Irish Veterinary Journal     Open Access   (Followers: 4)
Veterinary Clinics of North America: Food Animal Practice     Full-text available via subscription   (Followers: 4)
Journal of Veterinary Research     Open Access   (Followers: 4)
Equine Health     Full-text available via subscription   (Followers: 4)
Human & Veterinary Medicine - International Journal of the Bioflux Society     Open Access   (Followers: 4)
Transboundary and Emerging Diseases     Hybrid Journal   (Followers: 4)
Onderstepoort Journal of Veterinary Research     Open Access   (Followers: 4)
Nutrición Animal Tropical     Open Access   (Followers: 3)
Australian Equine Veterinarian     Full-text available via subscription   (Followers: 3)
Ethiopian Veterinary Journal     Open Access   (Followers: 3)
Frontiers in Veterinary Science     Open Access   (Followers: 3)
Asian Journal of Poultry Science     Open Access   (Followers: 3)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 3)
Medical Mycology     Open Access   (Followers: 3)
Case Reports in Veterinary Medicine     Open Access   (Followers: 3)
Veterinary Sciences     Open Access   (Followers: 3)
Bulletin of Animal Health and Production in Africa     Full-text available via subscription   (Followers: 3)
ILAR Journal     Hybrid Journal   (Followers: 3)
Journal of Veterinary Behavior     Hybrid Journal   (Followers: 2)
Indian Journal of Veterinary Anatomy     Full-text available via subscription   (Followers: 2)
Indian Journal of Animal Sciences     Open Access   (Followers: 2)
Kenya Veterinarian     Full-text available via subscription   (Followers: 2)
Open Journal of Veterinary Medicine     Open Access   (Followers: 2)
Veterinary Medicine and Science     Open Access   (Followers: 2)
VCOT Open     Open Access   (Followers: 2)
Journal of Feline Medicine and Surgery Open Reports     Open Access   (Followers: 2)
Advanced Research in Life Sciences     Open Access   (Followers: 2)
Theriogenology     Hybrid Journal   (Followers: 2)
Reproduction in Domestic Animals     Hybrid Journal   (Followers: 2)
New Zealand Veterinary Nurse     Full-text available via subscription   (Followers: 2)
Anatomia, Histologia, Embryologia: Journal of Veterinary Medicine Series C     Hybrid Journal   (Followers: 2)
Small Ruminant Research     Hybrid Journal   (Followers: 2)
Research & Reviews : Journal of Veterinary Science and Technology     Open Access   (Followers: 1)
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca : Food Science and Technology     Open Access   (Followers: 1)
Tropical Veterinarian     Full-text available via subscription   (Followers: 1)
Tanzania Veterinary Journal     Full-text available via subscription   (Followers: 1)
Pet Behaviour Science     Open Access   (Followers: 1)
Jurnal Ilmu dan Kesehatan Hewan (Veterinary Science and Medicine Journal)     Open Access   (Followers: 1)
Global Journal of Animal Scientific Research     Open Access   (Followers: 1)
Buletin Peternakan : Bulletin of Animal Science     Open Access   (Followers: 1)
Iranian Journal of Applied Animal Science     Open Access   (Followers: 1)
Revista Colombiana de Ciencias Pecuarias (Colombian journal of animal science and veterinary medicine)     Open Access   (Followers: 1)
Abanico Veterinario     Open Access   (Followers: 1)
Jurnal Veteriner     Open Access   (Followers: 1)
Veterinary and Comparative Orthopaedics and Traumatology     Hybrid Journal   (Followers: 1)
Jurnal Agripet     Open Access   (Followers: 1)
Buletin Veteriner Udayana     Open Access   (Followers: 1)
Journal of Veterinary Dentistry     Full-text available via subscription   (Followers: 1)
Journal of Advanced Veterinary Research     Open Access   (Followers: 1)
Brazilian Journal of Veterinary Medicine     Open Access   (Followers: 1)
Applied Animal Science     Hybrid Journal   (Followers: 1)
Indonesian Journal of Animal and Veterinary Sciences     Open Access   (Followers: 1)
Acta Veterinaria Hungarica     Full-text available via subscription   (Followers: 1)
Austral Journal of Veterinary Sciences     Open Access   (Followers: 1)
Veterinary Science Development     Open Access   (Followers: 1)
Acta Veterinaria Scandinavica     Open Access   (Followers: 1)
Veterinary Medicine: Research and Reports     Open Access   (Followers: 1)
Livestock     Full-text available via subscription   (Followers: 1)
Revista Mexicana de Ciencias Pecuarias     Open Access   (Followers: 1)
Archivos de Medicina Veterinaria     Open Access   (Followers: 1)
Tropical Animal Health and Production     Open Access   (Followers: 1)
Veterinary Quarterly     Open Access   (Followers: 1)
veterinär spiegel     Hybrid Journal   (Followers: 1)
Polish Journal of Veterinary Sciences     Open Access   (Followers: 1)
Revista Brasileira de Zootecnia     Open Access   (Followers: 1)
Revista Brasileira de Higiene e Sanidade Animal     Open Access   (Followers: 1)
Journal of the South African Veterinary Association     Open Access   (Followers: 1)
Journal of the Hellenic Veterinary Medical Society     Open Access   (Followers: 1)
Veterinary Research Communications     Hybrid Journal   (Followers: 1)
Chilean Journal of Agricultural & Animal Sciences     Open Access  
CES Medicina Veterinaria y Zootecnia     Open Access  
Veterinaria México OA     Open Access  
Compendio de Ciencias Veterinarias     Open Access  
Iranian Journal of Veterinary Surgery     Open Access  
Ciencia Veterinaria     Open Access  
Nepalese Veterinary Journal     Open Access  
Sri Lanka Veterinary Journal     Open Access  
Salud y Tecnología Veterinaria     Open Access  
Veterinary Parasitology : X     Open Access  
Jurnal Medik Veteriner     Open Access  
Tierärztliche Praxis Ausgabe K: Kleintiere / Heimtiere     Hybrid Journal  
Tierärztliche Praxis Ausgabe G: Großtiere / Nutztiere     Hybrid Journal  
Van Veterinary Journal     Open Access  
Journal of Veterinary and Animal Sciences     Open Access  
Rassegna di Diritto, Legislazione e Medicina Legale Veterinaria     Open Access  
Veterinaria (Montevideo)     Open Access  
SVU-International Journal of Veterinary Sciences     Open Access  
Matrix Science Medica     Open Access  
Veterinary Journal of Mehmet Akif Ersoy University / Mehmet Akif Ersoy Üniversitesi Veteriner Fakültesi Dergisi     Open Access  
Analecta Veterinaria     Open Access  
Veterinarski Glasnik     Open Access  
Medicina Veterinária (UFRPE)     Open Access  
Veterinaria     Open Access  
Jurnal Sain Veteriner     Open Access  
International Journal of Tropical Veterinary and Biomedical Research     Open Access  
Revista de Ciência Veterinária e Saúde Pública     Open Access  
Jurnal Medika Veterinaria     Open Access  
Veterinary Parasitology : Regional Studies and Reports     Full-text available via subscription  
Revue Vétérinaire Clinique     Full-text available via subscription  
Folia Veterinaria     Open Access  
Science and Animal Health     Open Access  
FAVE Sección Ciencias Veterinarias     Open Access  
Revista Ciencias Veterinarias     Open Access  
Wartazoa. Indonesian Bulletin of Animal and Veterinary Sciences     Open Access  
Indonesia Medicus Veterinus     Open Access  
Spei Domus     Open Access  
Revista de Educação Continuada em Medicina Veterinária e Zootecnia     Open Access  
Cogent Food & Agriculture     Open Access  
Revista Veterinaria     Open Access  
Journal of the Selva Andina Research Society     Open Access  
Bangladesh Veterinarian     Open Access  
Journal of Buffalo Science     Hybrid Journal  
Revista de Ciências Agroveterinárias     Open Access  
Intas Polivet     Full-text available via subscription  
Atatürk Üniversitesi Veteriner Bilimleri Dergisi / Atatürk University Journal of Veterinary Sciences     Open Access  
Revue Marocaine des Sciences Agronomiques et Vétérinaires     Open Access  
Acta Veterinaria     Open Access  
Nigerian Veterinary Journal     Open Access  
Revista Brasileira de Ciência Veterinária     Open Access  
Schweizer Archiv für Tierheilkunde     Hybrid Journal  
Bangladesh Journal of Veterinary Medicine     Open Access  
Macedonian Veterinary Review     Open Access  
Annual Review of Animal Biosciences     Full-text available via subscription  
Revista de Investigaciones Veterinarias del Perú     Open Access  
Revista Complutense de Ciencias Veterinarias     Open Access  
Medical Mycology Case Reports     Open Access  
Veterinaria México     Open Access  
Revista de Salud Animal     Open Access  
Revista de Medicina Veterinaria     Open Access  
Revista MVZ Córdoba     Open Access  
Avances en Ciencias Veterinarias     Open Access  
InVet     Open Access  
Zeitschrift für Ganzheitliche Tiermedizin     Hybrid Journal  
team.konkret     Open Access  
pferde spiegel     Hybrid Journal  
kleintier konkret     Hybrid Journal  

        1 2        [Sort alphabetically]   [Restore default list]

Similar Journals
Journal Cover
Chilean Journal of Agricultural & Animal Sciences
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 0719-3882 - ISSN (Online) 0719-3890
Published by SciELO Homepage  [672 journals]
  • ANALYSIS OF THE LACTATION CURVE OF MURRAH BUFFALOES WITH MIXED NON-LINEAR
           MODELS

    • Abstract: ABSTRACT This study aimed to evaluate the lactation curve of female Murrah buffaloes, using mixed nonlinear models (NLM), across three lactation periods (180 d, 210 d, and 240 d). A total of 5334 data on daily milk production (kg) were analyzed. The data were collected every seven days in the interval of one to 250 days of lactation, corresponding to 221 lactations and 145 females, with calvings from 2017 to 2019. The data came from a herd located in the Centro municipality, Tabasco, Mexico. Five NLM were evaluated: Wood (WOD), Wiltmink (WIL), Cobby (COB), Brody (BRO), Sikka (SIK). The best fit model was selected based on the mean prediction error, mean absolute percentage error (MAPE), prediction error variance, coefficient of determination (R2), concordance correlation coefficient (CCC), Akaike (AIC) and Bayesian (BIC) information criteria. A regression analysis was performed between the observed and predicted values. All the NLM had a R2 above 0.91. They tend to underestimate the predictions, without residual autocorrelation. The MAPE showed an average value of 23.5%. The best fit model was WOD, followed by SIK and BRO. For WIL and COB, the mixed model did not improve the fitting. The shortest lactation period showed the best fit, followed by the 210 d and 240 d periods. The relationship between observed:predicted values fluctuated from 0.65 to 1.00, with an average value of 0.94. The use of NLM transcended in the AIC and BIC. The evaluated models showed goodness of fit, with good predictability, but low values in accuracy and precision of prediction.
       
  • APPLICATION OF MULTIVARIATE ANALYSIS TO DIFFERENTIATE HARARGHE HIGHLAND
           GOAT POPULATIONS REARED IN THE WEST HARARGHE ZONE, ETHIOPIA

    • Abstract: ABSTRACT Multivariate analysis of morphological variables has been successfully used to estimate genetic variation within and between local breeds. The objective of this study was to differentiate Hararghe highland goat populations based on their morphometric traits by applying multivariate analysis. Sixteen morphometric traits were collected from 450 goats reared in the three agroecological zones (highland, midland and lowland) of West Hararghe. Multivariate canonical discriminant analysis in combination with cluster and discriminant analysis was applied to identify the combination of variables that differentiate goats of the three agroecological zones. The results indicated that all the morphometric traits were significantly affected by age. The cluster analysis indicated that two main groups of midland goats were included in one group, while group two included highland and lowland goats under one sub-cluster. The canonical discriminant analysis identified two canonical variables (CAN) of which CAN1 and CAN2 accounted for 68.2 and 31.8% of the total variation, respectively. The quadratic discriminant analysis correctly assigned the respective 71.3, 77.3, and 81.3% of lowland, midland, and highland goat populations into their source populations, with an overall accuracy rate of 76.7%. The Mahalanobis distance verified that lowland and highland goats are the closest, while midland and highland goats were the furthest. However, the canonical discriminant analysis indicated a visible overlapping between goat populations of the three agroecological zones, indicating the existence of homogeneity among them. In conclusion, multivariate analysis identified 11 morphometric traits as the most imperative traits to differentiate Hararghe highland goat populations effectively. Genetic potentials of Hararghe highland goat populations can be improved through community-based breeding programs for their sustainable utilization and conservation.
       
  • EARLY GROWTH MODEL OF PELIBUEY LAMBS RAISED UNDER AN INTENSIVE PRODUCTION
           SYSTEM IN COLIMA, MEXICO

    • Abstract: ABSTRACT The aim of this study was to describe the early growth of Pelibuey lambs raised under an intensive production system in Colima, Mexico, using non-linear models. Weight data were collected from 433 lambs every 30 days from birth to 180 days of age, and growth curves were estimated using non-linear and linear models. According to goodness of fit criteria, the Linear, Gomperrz, Logistic and Von Bertalanffy models are suitable and show a reasonable fit for describing Pelibuey lamb's growth, the Brody and Richards curves did not meet the convergence criterion. The parameter A denotes asymptotic weight; weight was higher in multiple born males and quadruplet born females in the Von Bertalanffy and Gomperrz models, while it was also higher in males in the Logistic model. The parameter k represents maturation rate and indicates the growth speed in reaching asymptotic weight, being higher in single and twin females, and single males in all the non-linear models. From birth up to 90 days of age (weaning), weight of single lambs becomes greater than that of multiple born lambs, but from 90 days of age, weight of multiple born lambs tends to equal that of singles, which happens at 180 days of age. The early growth of Pelibuey lambs can be described with similar precision using linear and non-linear models.
       
  • SUSTAINABILITY ASSESSMENT OF EXTENSIVE CATTLE AND SHEEP PRODUCTION SYSTEMS
           IN SOUTHERN CHILE

    • Abstract: ABSTRACT Extensive livestock systems have decreased in the last decades. In general, these systems are characterized by low profitability, but they have a key role on environment conservation, maintenance of rural population, and health of meat and milk consumers. The present study was carried out in 2017 with 29 livestock farmers in the cold steppe area, Rio Ibáñez District (Comuna de Rio Ibánez), Aysén Region, Chile. The objective of this work was to compare the characteristics of extensive cattle and sheep farms of Southern Chile with a previous study conducted in 2012, assess their sustainability in 2017 and propose improvement actions. The variables studied were included in five attributes according to MESMIS methodology: Productivity, Stability, Adaptability, Equity and Self-management. There were few and circumstantial changes between 2012 and 2017. The global sustainability index was calculated (58%). The values of the five sustainability attributes were 54-64%. The results indicate that livestock farmers carry out valuable practices for sustainability, such as Cattle carry out short seasonal migration, Farmer vaccinates animals, Farmer desparasites animals, Does soil analyses and Farmer has done training courses. The suggested actions to improve sustainability are related to farm and farmer's characteristics, including trading through farmers' associations and off-farm activities. Collaborative work between livestock farmers and government institutions is required to implement the proposed actions. It is also important to raise consumers' awareness of the importance of extensive production systems and the differentiated quality of their products.
       
  • BIOCONTROL CAPACITY OF NATIVE ISOLATES OF Trichoderma sp. AGAINST THE
           PHYTOPATHOGENIC FUNGUS Alternaria alternata ISOLATED FROM YERBA MATE (Ilex
           paraguariensis Saint Hil.)

    • Abstract: RESUMEN Los hongos fitopatógenos afectan a cultivos agrícolas, como la yerba mate (Ilexparaguariensis Saint Hil.). Una alternativa innovadora para el control de plagas es el empleo de hongos biocontroladores del género Trichoderma. Los objetivos del presente trabajo fueron aislar los agentes fúngicos causantes de lesiones foliares en yerba mate, y evaluar la capacidad antagónica de los aislamientos nativos de Trichoderma sp. frente a patógenos en este cultivo. A partir del corte, desinfección y siembra del tejido vegetal enfermo, se aisló e identificó morfológica y molecularmente un hongo fitopatógeno perteneciente a la especie Alternaria alternata. Se ensayaron pruebas de patogenicidad en plantas de yerba mate por triplicado. Se realizaron lesiones mecánicas superficiales en ellas y se inoculó el aislamiento fitopatógeno obtenido (conidios y micelio) para evaluar su capacidad fitopatógena. Se determinaron nuevas variantes de cultivo dual para evaluar la capacidad antagónica biocontroladora en condiciones in vitro. Se evaluó la capacidad biocontroladora in vitro de 30 aislamientos de Trichoderma frente al aislamiento fitopatógeno obtenido. Como control positivo se utilizó una cepa aislada de un producto fungicida comercial a base de T. harzianum. Se determinó que 18 de los 30 aislamientos de Trichoderma lograron inhibir en más del 50% el crecimiento del fitopatógeno A. alternata y presentaron diferencias estadísticamente significativas con respecto al control positivo. Estos resultados reafirman la efectividad de utilizar aislamientos biocontroladores nativos ya adaptados a las condiciones edafo-climáticas del ambiente en donde se encuentra el microorganismo fitopatógeno a controlar biológicamente.ABSTRACT Phytopathogenic fungi attack many agricultural crops such as yerba mate (Ilex paraguariensis Saint Hil.). An innovative alternative for pest control is the use of biocontrol fungi of Trichoderma genus. The objectives of the present work were to isolate the fungal agents that cause foliar lesions in yerba mate, and to evaluate the antagonistic capacity of native Trichoderma sp. isolates against pathogens in this crop. From diseased plant-tissues, a phytopathogenic fungus belonging to Alternaria alternata species was isolated and identified morphologically and molecularly. Pathogenicity assays were done on yerba mate plants in triplicate. Superficial mechanical lesions were made on them and the phytopathogenic isolation obtained (conidia and mycelium) was inoculated to evaluate their phytopathogenic capacity. New dual culture methods were determined to evaluate in vitro antagonism of Trichoderma. The in vitro biocontrol capacity of 30 Trichoderma isolates was evaluated against the phytopathogenic isolation obtained. As a positive control, a strain isolated from a commercial fungicide product based on T. harzianum was used. It was determined that 18 of the 30 isolates of Trichoderma inhibited the growth of the phytopathogen A. alternata by more than 50%, and presented statistically significant differences with respect to the positive control. These results confirm the effectiveness of using native biocontrol isolates adapted to the climatic and soil conditions where the phytopathogenic microorganisms are found.
       
  • INSECTICIDAL ACTIVITY AND PERSISTENCE OF A FORMULATION BASED ON Beauveria
           bassiana FOR Diatraea saccharalis CONTROL

    • Abstract: RESUMEN El desarrollo y uso de plaguicidas microbianos para el control de plagas agrícolas se ha intensificado en los últimos años, debido a la creciente necesidad de reducir el uso de agroquímicos de alta toxicidad. Pero para suplir esta creciente necesidad de bioplaguicidas, es necesario desarrollar formulaciones adecuadas que estabilicen a los microorganismos frente a los factores ambientales de estrés que reducen su eficacia y persistencia de en campo. En este contexto, el objetivo del presente trabajo fue determinar la actividad insecticida y persistencia en plantas de caña de un concentrado emulsionable (CE) a base de Beauveria bassiana para el control del barrenador de la caña, Diatraea sp. La fotoestabilidad frente a la radiación UV tipo B y las concentraciones letales media y noventa del bioplaguicida también se determinaron bajo condiciones de laboratorio. El CE presentó una eficacia superior al 80% para el control de larvas de D. saccharalis bajo condiciones semicontroladas de campo. La formulación fotoestabilizó eficientemente los conidios, manteniendo un 68,9% de germinación después de nueve minutos de irradiación, mientras que los conidios sin formular perdieron completamente la capacidad de germinar. Este efecto también se observó para la actividad insecticida, ya que los conidios sin formular perdieron un 30% más de eficacia que los conidios formulados, después de nueve minutos de irradiación. La actividad insecticida y el recuento de conidios en plantas de caña de azúcar en campo disminuyeron a partir de la primera y segunda semana después de la aplicación, respectivamente. Aunque el CE a base de B. bassiana demostró una efectiva actividad insecticida contra D. saccharalis, es necesario realizar estudios de campo para optimizar la formulación y determinar el método y frecuencia de aplicación que permitan maximizar su desempeño.ABSTRACT The development and use of microbial pesticides for the control of agricultural pests has intensified in recent years due to the increasing need for reductions in the use of highly toxic agrochemicals. To fill this growing need for biopesticides it is necessary to develop suitable formulations that stabilize microorganisms against environmental stress factors that reduce their efficacy and persistence in the field. In this context, the objective of the present work was to determine the insecticidal activity and persistence on sugarcane plants, of an emulsifiable concentrate (EC) containing Beauveria bassiana for the control of sugarcane borer, Diatraea sp. Photostability of the formulation under UV radiation type B and the mean and ninety lethal concentrations were also determined under laboratory conditions. The EC reached more than 80% efficacy against D. saccharalis larvae under semi-controlled field conditions. The EC efficiently photostabilized the conidia, maintaining 68.9% germination after nine minutes of irradiation while unformulated conidia completely lost the ability to germinate. This effect was also observed for the insecticidal activity, with unformulated conidia losing 30% more efficacy than formulated conidia after nine minutes of irradiation. The insecticidal activity and conidia count on sugarcane plants under field conditions decreased one and two weeks post application, respectively. Although the EC containing on B. bassiana demonstrated effective insecticidal activity against D. saccharalis, it is necessary to carry out field trials to optimize the formulation and determine the method and frequency of application to maximize its performance.
       
  • Bacillus subtilis ISOLATED FROM CUTICLES OF ANTS NESTING IN HIVES AS
           ANTIFUNGAL AGAINST FUNGAL PATHOGENS OF BEES

    • Abstract: RESUMEN La presencia de hormigas en los apiarios ha sido considerada durante mucho tiempo un problema para la apicultura. En la producción apícola es muy importante el aspecto sanitario de las colmenas, ya que las abejas melíferas son afectadas por virus, bacterias, hongos y parásitos. Penicillium, Aspergillus y Fusarium son micotoxigénicos con una amplia distribución en el mundo. Se ha demostrado la presencia de estos hongos en el tubo digestivo de las abejas y en la miel. Una de las bacterias más estudiadas como antagonistas es Bacillus. El objetivo del estudio fue determinar la actividad antifúngica de Bacillus subtilis frente Aspergillus sección nigri y Fusarium solani. Se realizó el aislamiento en Agar nutritivo de B. subtilis de cutículas de hormigas de colmenares de los valles templados de la provincia de Jujuy, Argentina. Los hongos fueron provistos por el cepario del Laboratorio de Microbiología Agrícola y Sanidad Apícola y Meliponícola de la Facultad de Ciencias Agrarias, UNJu. Las pruebas de antagonismo se realizaron en placas con medio agar papa dextrosa con explantes de los hongos frente a Bacillus subtilis incubadas a 28°C durante una semana. Se registraron los diámetros de las colonias y se determinó el porcentaje de inhibición a los 5, 10 y 15 días. Los porcentajes de inhibición fueron mayores a los 5 días de incubación. El porcentaje de inhibición fue mayor al 50% en Aspergillus sección nigri y mayor al 65% en Fusarium solani. Bacillus subtilis mostró actividad antifúngica contra los hongos patógenos de abejas en estudio.ABSTRACT The presence of ants in apiaries has long been considered a problem for beekeeping. The health of the hives is a key issue in beekeeping since honey bees are affected by viruses, bacteria, fungi and parasites. Penicillium, Aspergillus and Fusarium are mycotoxigenic fungi, which are widely distributed throughout the world. The presence of these fungi has been observed in both the digestive tract of bees and honey. One of the most studied bacteria as antagonists is Bacillus. The objective of the study was to determine the antifungal activity of Bacillus subtilis against Aspergillus section nigri and Fusarium solani. The isolation was carried out in nutritive agar of B. subtilis from cuticles of ants from apiaries of the temperate valleys of the province of Jujuy, Argentina. The fungal strains were obtained from the strain collection of the Laboratory of Agricultural Microbiology and Beekeeping/ Stingless beekeeping Health of the Faculty of Agrarian Sciences, UNJu. The antagonism tests were performed on plates with potato dextrose agar medium with explants of the fungi against Bacillus subtilis incubated at 28 ° C for one week. Colony diameters were recorded, and the percentage of growth inhibition was determined at 5, 10 and 15 days. The inhibition percentages were higher after 5 days of incubation. The inhibition percentage was greater than 50% in Aspergillus section nigri and greater than 65% in Fusarium solani. Bacillus subtilis showed antifungal activity against the pathogenic fungi of bees under study.
       
  • CHARACTERIZATION OF Cochliobolus sativus AND Pyrenophora teres FUNGI
           BELONGING TO THE LEAF SPOT COMPLEX OF BARLEY (Hordeum vulgare) ISOLATED
           FROM BARLEY SEEDS IN MEXICO

    • Abstract: ABSTRACT Barley (Hordeum vulgare) is generally used for animal feed, and food and beer production industries. Its production is affected by phytopathogens, of which Ramularia collo-cygni, Puccinia spp., Pyrenophora teres and Cochliobolus sativus are of global concern. In Mexico, there are few studies available on the morphological and molecular identification of fungi responsible for causing fungal diseases of barley. Therefore, the objective of this work was to identify, morphologically and molecularly, fungi isolated from barley seeds. The strains were identified by morphological analysis and by sequencing of the conserved ITS1/5.8s/ITS2 region of the ribosomal gene. Morphologically, the strains were identified as P. teres and C. sativus, which was confirmed with bioinformatics techniques using BLAST and MEGA6 programs. The results showed that the strains isolated from barley seeds in the highlands of Mexico were consistent with the sequences of P. teres and C. sativus deposited in the GenBank. These results will allow identifying some of the species of native fungi found in barley seeds.
       
  • ALLELOPATHIC EFFECTS OF COMMON BRACKEN (Pteridium aquilinum (L.) Kuhn) ON
           GERMINATION AND GROWTH OF ECONOMICALLY IMPORTANT WEEDS

    • Abstract: ABSTRACT Pteridium aquilinum (L.) Kuhn is a cosmopolitan plant with great competitive abilities, including allelopathy. The search for plants with negative allelopathic effects on other undesirable plants has led to the discovery of new useful substances for weed control. The objective of this research was to evaluate the allelopathic effect of P. aquilinum on seed germination and growth of four economically important weeds: Bidens pilosa L., Brachiaria decumbens Stapf, Emilia sonchifolia (L.) DC. ex DC and Rumex crispus L. Two experiments were conducted under laboratory and greenhouse conditions using extracts and dried plant residues of P. aquilinum, respectively. For the first experiment, extracts of bracken were obtained using four different solvents (hexane, dichloromethane, ethyl acetate, and methanol) and applied to the test seeds; germination rates were determined. For the second experiment, dry residues of bracken were applied to the soil at concentrations of 2, 5, and 10% and their effect on weed growth variables was determined; a control treatment (no appliacation) was also included. In addition, the presence of some chemical groups associated with each type of extract was qualitatively detected. The extracts inhibited seed germination by 52 - 97% in all the studied species. Dichloromethane and methanol were the most efficient solvents, while E. sonchifolia was the most sensitive species. The dry residues of bracken reduced germination by 18 - 44% of all the weeds, as well as root length of Bidens pilosa (-30%) and Brachiaria decumbens (-82%). The phytochemical analysis showed the presence of flavonoids, tannins, and polyphenols in the extracts. These results suggest that P. aquilinum can be a good alternative for the biocontrol of the weeds under study and provide knowledge for the development of bioherbicides.
       
  • CHANGES IN MACRONUTRIENTS AND PHYSICAL PROPERTIES DURING THE GROWTH OF
           Lentinula edodes AND Pleurotus ostreatus IN A COMPOST BASED ON SUGARCANE
           BAGASSE AGRICULTURAL WASTE

    • Abstract: ABSTRACT Spent mushroom substrate of different edible mushrooms is a nutrient-rich biomass associated with mycelial metabolic activity in the growth substrate. The objective of this study was to evaluate the changes in the nutritional content and physical properties of a sugarcane bagasse substrate after the cultivation of the edible mushrooms Pleurotus ostreatus and Lentinula edodes. Strains of both species were first propagated in potato dextrose agar culture medium, then in wheat grains, and finally inoculated in sterile sugarcane bagasse. Determinations of macronutrients, pH and C: N ratio were carried out at 0, 30 and 60 days after mushroom mycelium growth in the bagasse-based substrate. After 30 and 60 days of inoculation, nitrogen (N), phosphorous (P) and potassium (K) recorded increases of 0.26%, 0.06% and 0.14 with Pleurotus ostreatus, and increases of 0.33%, 0.05%, and 0.11% with Lentinula edodes, respectively. Regarding micronutrients, there was an increase in Calcium (Ca) and Sulphur (S) in both substrates, but amounts varied during the time evaluated. Additionally, an important increase in hydrogen ion concentration was observed when both species were inoculated, with final values of 4.26 and 3.9 for Pleurotus ostreatus and Lentinula edodes species, respectively. In conclusion, this biomass presents a high percentage of the essential micro and macro elements required in a fertilizer.
       
  • WILD BARBERRY FRUIT (Berberís microphylla G. Forst.) AS A NATURAL
           INGREDIENT FOR BEER BREWING

    • Abstract: ABSTRACT Barberry (Berberís microphylla) is a wild berry endemic to the Andean-Patagonian zone of Argentina and Chile. Even though it is not widely used or consumed, it has great potential for coloring and enrichment of different food matrices due to its high anthocyanin and antioxidant contents. The objective of this study was to evaluate the impact of barberry addition on quality parameters and stability of sour beer. Nutritional, physicochemical and sensory characteristics of the beer were analyzed. Firstly, different amounts of freeze-dried barberry were added to sour beer (0, 2.5, 5, and 10 g L-1) after primary fermentation. In the next experiment, beers brewed with 0 (control) and 5 g L-1 of barberry were stored at 5°C for up to 90 days and evaluated on a monthly basis. As demonstrated by the CIE Lab and Abs520nm parameters, barberry addition resulted in a marked color shift towards ruby red tones. It also increased TEAC and phenolic contents by 2-4 times, without affecting beer pH, acidity, or density. Furthermore, it had a positive impact on overall impression, appearance, aroma, flavor and balanced scores in a trained sensorial panel. Beer total anthocyanins varied between 30 and 100 mg D3G L-1. The beers brewed with barberry fruit presented stable antioxidant capacity, total anthocyanin content and both anthocyanin ionization and polymerization degree during storage. The results show that barberry can be used as an ingredient to make red and antioxidant-enriched sour beers with good stability during storage.
       
  • PULVERIZACIONES AGRÍCOLAS: COMPARACIÓN DE METODOLOGÍAS PARA SU
           EVALUACIÓN AGRICULTURAL SPRAYS: COMPARISON OF EVALUATION METHODS

    • Abstract: RESUMEN Se realizó un ensayo con el objetivo de comparar colectores artificiales (papel hidrosensible y papel fotográfico Glossy) y dos programas informáticos (Gotas-PC y CIR1.5) para la valoración de una aplicación con diferentes diseños de boquillas (XR11002VP y TXA8002VK). Los parámetros evaluados fueron DV0,5, densidad de impactos de las gotas y eficiencia; este último se comparó como contraste de la determinación colorimétrica del trazador azul brillante. Se trabajó dentro de un galpón cerrado, bajo condiciones semicontroladas, sin viento y sobre terreno uniforme. La densidad de impactos no presentó diferencias entre colectores para el programa Gotas-PC, pero sí para CIR1.5. Al utilizar colectores hidrosensibles, la eficiencia es sobrestimada con el programa CIR1.5 y subestimada con Gotas-PC. Con colectores fotográficos, ambos programas subestiman, debido a que presentan improntas más pequeñas que arrojan valores de DV0,5 y eficiencia menor. En aplicaciones con población de gotas de menor tamaño, los porcentajes de eficiencia son similares con los dos programas. El programa CIR1.5 es más sensible al momento de analizar las gotas sobre ambos colectores y es capaz de distinguir mayor número de gotas y de menor tamaño.ABSTRACT A study was conducted in order to compare two types of artificial collectors (water-sensitive paper and photographic paper) using two software programs (Gotas-PC and CIR1.5) for the assessment of spray applications with two different nozzle types (XR11002VP and TXA8002VK). The evaluated parameters were DV0.5, droplet number density and efficiency, this was compared to the colometric determination with bright blue tracer. The trial was conducted inside a closed facility, under semi-controlled conditions, in absence of wind and on a uniform level ground. Droplet number density did not show significant differences between collectors using Gotas-PC, but differences were found with CIR1.5. For water-sensitive paper, efficiency is overestimated with CIR1.5 software but underestimated with Gotas-PC. However, both software programs underestimate with photographic paper according to the smaller imprints that result in lower values of DV0,5 and efficiency. In applications with smaller droplet population, efficiency is similar with both software programs. The CIR1.5 software is more sensitive for analyzing drops on both collector types and can distinguish a larger number of drops and smaller sizes.
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 34.239.147.7
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-