Mites associated with some plants of the family solanaceae at Fayoum and Beheira governorates / Mohamad lamlom sallam ; Supervised Morad Fahmy Hassan , Shahira Mohamed Elbeshlawy , Sawsan Mohamed Elsawy

Thesis (M.Sc.) - Cairo University - Faculty of Agriculture - Department of Nematology

The aim of the present study is to through light on studying mites associated with some plants of the solanaceae family, description and ontogenic development of immature stage of Cosmolaelaps keni Hafez, El-Badry and Nasr, studies included also biology of C. keni fed on various prey. Samples of mite species belonging to 3 sub orders were collected during the years of (2013, 2014 and 2015) from various Solanaceae plants. Samples collected from 2 Governorates (Beheira and Fayoum) in Egypt. The results revealed that, 35 mite species belonging to 17 families were recorded during my survey. Description of the C. keni male as well as the variation of the ontogenic development immature stages (Larva, Protonymph, and Deutonymph) was also studied. Cosmolaelaps keni was able to feed, develop and reproduce on active stages 1st and 2nd nymphal stages of Thrips tabaci and eggs of Tuta absoluta, Phthorimaea operculella and Agrotis ipsilon. Results indicated that, the mean consumption rate during the oviposition periods was similar when the predator fed on eggs of P. operculella and T. absoluta (211.22 and 205.67 eggs), respectively. The daily number of deposited eggs by C. keni was the highest on A. ipsilon eggs and the lowest being on T. tabaci nymphs. The effect of A. ipsilon, T. absoluta and P. operculella eggs and T. tabaci nymphs as food on the effects of various prey insects were included in the present study.The determination of the polyptides of different prey species with comparing the similarities index value of P. operculella, T. tabaci and A. ipsilon with T. absoluta indicated that the SI values was high (0.93) on P. operculella and T. tabaci related to T. absoluta

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