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Abstract

Experiments were conducted at Faculty of Agriculture farm Shebin Elkom and laboratory of Economic Entomology and Agricultural Zoology Department to study the eriophyid mites associated with three vegetable plants, five fruit trees, and two ornamental plants during the period from 2013/2015. Incidence studies indicated that 11 species of eriophyid mites belonging to 7 Genera was collected. Five plant extracts were chosen to determine their effect on Aculops lycopersici mite, after one week the redaction percentages were the highest when cayenne pepper and garlic used 98, 91 % while this percentage approximately ranged between 85, 88 % for other plant extracts, three weeks after application the reduction percentages were 100% in all plant extracts treatment except thyme record 98%. Ten chemical compounds as pesticides were experimented to show their effect on Aculops lycopersici. One day after application Sino S recorded the highest reeducation percentage 97% followed by Citrogard and Dumber 90%, while the lowest reduction percentages ware recorded by Vermex and Arrow 43, 46 %. Also, studied effect of some control methods against eriophyid mites on some morphological characters of tomato plants. It was observed that plant length increase in all treatments than untreated plants, increase percentage were 88.6, 89.7 % for Acari stop and high point treatment, while it was 88.4 , 90.9% in Cayenne pepper and Garlic three weeks after application. Biology of eriophyid mite Aceria dioscoridis reared in laboratory under 28± 2 C and 75± 5% R. H. the mean of incubation period was 1.75± 0.32 days, 72% from eggs was hatched to active larvae. Some biological aspects of predatory mite were studies when used Aceria dioscoridis ,Cisabroptus Kenyaeas prey, the incubation period of predator egg was 2.44± 0.61days for female, while it was 2.42± 0.51days for male. The life cycle of the predatory mite ranged from 8:12 days for female and 7: 12 for male.