Variations in certain biological aspects of the cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae) in relation to color of its forms

Authors

  • Y. A. Darwish Plant Protection Department, Faculty of Agriculture, Assiut University, 71526 Assiut,
  • M. M. A. Rizk Plant Protection Department, Faculty of Agriculture, Assiut University, 71526 Assiut,
  • S. A. Eraky Plant Protection Department, Faculty of Agriculture, Assiut University, 71526 Assiut,
  • Amal A. Atta Plant Protection Department, Faculty of Agriculture, Assiut University, 71526 Assiut,

Keywords:

cotton aphid colored forms, biological aspects, pirimicarb, Aphis gossypii

Abstract

The stock populations of two groups of Aphis gossypii Glover (Homoptera: Aphididae) were collected from cucurbitaceous plant leaves cultivated in Assiut and the New Valley Governorates, Egypt. Both aphid groups were brought into the laboratory and used as base line of pirimicarb resistance. Pirimicarb LC50 base line was determined by the dipping technique in successive concentrations of the trade form of pirimicarb mixed in water. The LC25 was determined monthly throughout two years and used in the selection.. This procedure resulted four aphid forms at each location (i.e., base line, mixed, light color, and dark color).  It was found that the total nymphal duration of dark forms collected from both locations did not vary significantly from the base line forms. Data of the reproductive biology of aphids from both locations showed that the fecundity period, longevity and productivity of the dark morphs were significantly higher than those of the base line ones.

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Author Biography

Y. A. Darwish, Plant Protection Department, Faculty of Agriculture, Assiut University, 71526 Assiut,

Plant Protection

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Published

2014-05-24

How to Cite

Darwish, Y. A., Rizk, M. M. A., Eraky, S. A., & Atta, A. A. (2014). Variations in certain biological aspects of the cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae) in relation to color of its forms. Journal of Phytopathology and Disease Management, 1(2), 1–8. Retrieved from https://ppmj.net/index.php/ppmj/article/view/10

Issue

Vol. (1), Issue (2)

Section

Research Articles

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