Efficacy of Predacious Mite, Phytoseiulus, Presimilis and the acaricide, Ortus in Cntrolling the Spider Mits, Tetranychus urticae on Eggplant at Beni-Suef Governorate, Egypt

In this study, the evaluation of some control methods against the two-spotted spider mite, tetranychus urticae koch on eggplant solanum melongen l. was carried out under field conditions at beni-suif governorate, egypt in season 2014.the predatory mite phytoseiulus persimilis athias-henriot, (acarina: phytoseiidae), and the acaricide (ortus) 5% e.c 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 eggplant cultivars using the released predatory mite p. persimilis at rate of 30 adult predators/eggplant seedling was significantly the highest reduction (82.74%), followed by (ortus) (77.27%). the second trial included the released predator at levels 20 and 10 adult predators/eggplant seedling and gave the highest reduction at the level of 20 adult predators/eggplant seedling (70.71 and 61.43%). it could be concluded that the using p. persimilis at rate of 30 adult predators/eggplant for controlling t.urticae was superior than using the acaricde , ortus 5% (e.c)