MORPHOLOGICAL AND BIOLOGICAL OBSERVATIONS ON THE APHID PARASITOID LYSIPHLEBUS FABARUM MARCHALL (HYMENOPTERA: BRACONIDAE)

Document Type : Original Article

Authors

1 Faculty of Agriculture, Ain Shams University, Cairo, Egypt

2 Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt

Abstract

The cowpea aphid, Aphis craccivora Koch. is the most common species attacks leguminous crops in Egypt. Among the parasitoid spe­cies which attack A.craccivora on faba bean was the braconid parasitoid, Lysiphlebus faberum Marchall. Morphological and biological studies on the parasitoid species were conducted under the laboratory conditions, 200D and 70% R.H. Egg, larva, pupa and adult of the parasitoid were de­scribed. Biological studies included duration of immature stages, emer­gence process of the parasitoid adult, mating behavior, egg-laying pro­cess, adult longevity and sex ratio. Duration Of Liabarum immature stages averaged 0.4 t 0.03. 5.2 t 0.2 and 4.1 t 0.1 days under labora­tory conditions for the incubation period, larval and pupal periods, re­spectively. Adult longevity lasted 1.9 ± 0.1 and 4.1 t0.2 days for male and female, respectively. Sex ratio was estimated as 1:2.8 Cifq_ under the laboratory conditions.

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