5223
MOHAMAD LAMLOM SALLAM
MITES ASSOCIATED WITH SOME PLANTS OF THE FAMILY SOLANACEAE AT FAYOUM AND BEHEIRA GOVERNORATES
Acari, Laelapidae, Phytoseiidae, Stigmaeidae, Feeding habits, Cosmolaelaps keni, Neoseiulus barkeri, Cydnoseius negevi, Agistemus exsertus, Life table parameters, Biological control. 12B)
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. This indicated that there is great similarity between these samples to T. absoluta sample. On the other hand, the SI of A. ipsilon sample recorded the lowest value (0.77), indicating that there is a genetic variation between A. ipsilon sample and T. absoluta sample. Laboratory biological studies of mites of the family phytoseiidae were studied Neoseiulus barkeri (Hughes) and Cydnoseius negevi Swirski and Amitai. Results indicated that, insignificant differences was found on the life cycle duration of both predatory mites when offered T. tabaci. Results indicated that, the consumption rate during the oviposition period was significantly higher in N. barkeri than in C. negevi when both predatorsoffered T. tabaci (163.50 and 124.72 nymphs), respectively. The mean consumption rate during the oviposition period was significantly lower on N. barkeri than C. negevi when both fed on B. Tabaci eggs (1.06and 33.56 eggs), respectively. Agistemus exsertus Gonzalez, mites of the family Stigmaeidae larvae of the predatory was failed to feed and develop beyond the larval stage on T. absoluta eggs. Newly emerged females was able to feed and sustain pre-oviposition period was 1.05 days while the ovi-position period being 17.58 days when females fed on eggs of T. absoluta. Females of A. exsertus were laid an average (44.16 eggs) during the oviposition period.
2016
M.Sc
Cairo
Agriculture