The experiments were carried out in the laboratory, green houses and the fields for studying some biological characters of some beneficial insects on certain important vegetable crops.These experiments were conducted during the three successive seasons in Egypt. The aim of these trials was to evaluate the possibility of using the reared aphid parasitoid and the coccinellid predatory insects coccinella septempunctata, C.undecimpunctata L., Cydonia vicina isis Gr, Hippodamia tridecimpunctata L. and Exochomus nigromaculatus (Goeze), for the biological control of certain aphid species.

Prof.Dr Ahmed Amin Ahmed Saleh Professor(Chef Research) Plant Protection Research Institute, Dokki, Giza- Agricultural Research Center - Egypt.2009Shared in 45 training cycle,Projects and Conference,Publishing 40 Papers and nine books in biological Control field.Member in many Journals.

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