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Journal Cover Journal of Entomological and Acarological Research
  [2 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2038-324X - ISSN (Online) 2279-7084
   Published by PAGEPress Homepage  [75 journals]
  • Effects of various host plants on nutritional indices and some biochemical
           compounds in green oak leaf roller, Tortrix viridana L. (Lepidoptera:

    • Authors: H. Yazdanfar, M. Ghodskhah Daryaei, J. Jalali Sendi, H. Ghobari, B. Valizadeh
      Pages: 98 - 102
      Abstract: The green oak leaf roller, Tortrix viridana L., is one of the most destructive pests, causing damages to various species of oak, feeding on different host plants including Quercus infectoria Oliv, Q. branti Lindl, and Q. libani Oliv. Nutritional indices, activity of enzymatic and non-enzymatic compounds of T. viridana were studied under laboratory conditions. In addition, chemical components were analysed in the leaves of the three host plants. Fourth instar larvae reared on Q. branti showed the highest values of relative consumption rate (RCR), approximate digestibility, and consumption index (48.73±6.22; 90.45±1.06 and 97.45±12.44 respectively), while the lowest values were observed on Q. libani. Efficiency of conversion of ingested food in the fourth instar larvae was the highest (3.17±0.661) on Q. libani and the lowest (1.53±0.164) on Q. branti. The fifth instar larvae fed on Q. libani had the highest RCR (15.64±2.51). The highest amounts of triglycerides, uric acid, glucose, protein and the lowest activity of alkaline phosphatase were observed in the fifth instar larvae reared on Q. libani. The leaves of Q. libani highlighted the highest amounts of total nitrogen, total protein, water, potassium, magnesium and total carbohydrate. The present research suggested that the nutritional quality of the host plants have crucial effects on T. viridana larvae.
      PubDate: 2015-12-16
      Issue No: Vol. 47, No. 3 (2015)
  • Characterisation and tracking changes of morphological characteristics in
           honey bee, Apis mellifera, colonies

    • Authors: H.F. Abou-Shaara, M.E. Ahmed
      Pages: 103 - 108
      Abstract: Measuring morphological characteristics of honey bee, Apis mellifera, at different times is important to assess the degree of race purity, to predict colony productivity, and to understand environmental impacts on honey bees. The study aims to characterise current honey bees of Northwest Egypt, namely El-Behera governorate, and to track occurred changes to their morphological characteristics since 2007. Samples of honey bee workers were collected from four districts in El- Behera governorate. Nine body and six wing characteristics were measured. Morphological characteristics of honey bees belonging to these districts were previously measured during 2007. To track changes, a comparison between new (2014) and previous (2007) measurements of morphological characteristics was done. The current bees of El-Behera are slightly larger than those of 2007, emphasising no reduction in colonies productivity. There is evidence that environmental factors have not caused much stress on the colonies since 2007. The results of this study are useful in providing understanding of the current state of bees in Egypt, and the likely improvement of future beekeeping.
      PubDate: 2015-12-16
      Issue No: Vol. 47, No. 3 (2015)
  • Evaluating the virulence of Metarhizium anisopliae (Deuteromycotina:
           Hyphomycetes) and Beauveria bassiana (Ascomycota: Hypocreales) isolates to
           Arabian rhinoceros beetle, Oryctes agamemnon arabicus

    • Authors: M.W. Khudhair, M.Z. Khalaf, H.F. Alrubeai, A.K. Shbar, B.S. Hamad, H.S. Khalaf
      Pages: 117 - 122
      Abstract: Virulence of entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana were tested against Arabian Rhinoceros Beetle, Oryctes agamemnon arabicus larvae. Four concentrations (1×105, 1×107, 1×109 and 1×1011 conidia/mL–1) of two locally isolated entomopathogenic fungi spore suspensions were used in this study via larval direct spraying. Results revealed that both isolates can cause high mortality rate reaching 100% after 29 days. However, Beauveria bassiana scored higher mortality rate in short time especially at the concentration of 1×1011 conidia/ mL–1 with lethal time (LT)50 12.75 and LT90 20.00; while, Metarhizium anisopliae caused the higher percentage of malformed adults. Moreover, both isolates affected insect’s life cycle particularly in the pupal stage which was reduced remarkably by almost 50% in comparison with the control treatment.
      PubDate: 2015-12-16
      Issue No: Vol. 47, No. 3 (2015)
  • A key to larvae of Diamesa Meigen, 1835 (Diptera, Chironomidae), well
           known as adult males and pupae from Alps (Europe)

    • Authors: B. Rossaro, V. Lencioni
      Pages: 123 - 138
      Abstract: A key to species belonging to the genus Diamesa Meigen, 1835 (Diptera, Chironomidae) well known as adult males and pupal exuviae from European Alps, is presented; the characters useful in species identification are pictured. The key considers both qualitative and quantitative characters. Thirteen morpho-species are distinguished, probably more species have a very similar larva and can be separated only in the adult or pupal stage. The most discriminant quantitative characters are the length and thickness of anal setae, among qualitative characters the most discriminant ones are the head capsule colour and the split of setae anteriores of labrum. The shape of mental and mandibular teeth are good taxonomic characters, but can be rarely used because teeth are often worn out in samples collected in the field. Quantitative characters show variability within each species, differing according to the sampled site and season, and must be used with caution. The following species groups can be easily separated in the larval stage: i) dampfi, including D. dampfi and D. permacra; ii) latitarsis including D. modesta and D. latitarsis; iii) zernyi including D. zernyi and D. vaillanti. D. starmachi, D. steinboecki, D. goetghebueri, D. bertrami, D. aberrata, D. incallida, D. cinerella, D. tonsa and D. insignipes can be separated from all the other known species in larval stage, but some of them, D. cinerella and D. insignipes for example, have a very similar larva, so are better separated on the basis of their distribution and collection of adults and pupae are strongly recommended to support identifications. A new character bound to head capsule colour is proposed to separate D. insignipes, D. cinerella, D. tonsa and D. zernyi.
      PubDate: 2015-12-16
      Issue No: Vol. 47, No. 3 (2015)
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