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In this study, the evaluation of some control methods against the two-spotted spider mite, Tetranychus urticae Koch on Soybean plants Solanum melongen L. was carried out under field conditions at Beni-Suif Governorate, Egypt in season 2018.The predatory mite Phytoseiulus persimilis Athias-Henriot, (Acarina: Phytoseiidae), and The acaricide (Sanmite) 20%WP were tested. Obtained results showed that the total average number of the mite population was significantly  different with control (F=  75.37, P < 0.0001 & EV = 87.6%), with the mean reduction percentage of significance (F= 56.31, P < 0.0001 &  EV =  84.07%).The mean reduction percentage of the mite population on soybean plants cultivars using the released predatory mite P. persimilis  at rate of 30 adult predators/soybean plants seedling was significantly the highest reduction (83.84%), followed by (Sanmite) (78.66%). The second trial included the released predator at levels 20 and 10 adult predators/soybean plants seedling and gave the highest reduction at the level of 20 adult predators/soybean plants seedling (72% and 62.55%). It could be concluded that the using P. persimilis at rate of 30 adult predators/Soybean plants for controlling T.urticae was superior than using The acaricde , Sanmite 20% (WP)

egyptian academic journal of biological sciences. f, toxicology and pest control

Efficacy of Predacious Mite, Phytoseiulus presimilis and the Acaricide, Sanmite In Controlling The Spider Mite, Tetranychus urticae on Soybean Plant at Beni-Suef Governorate, Egypt.