المكافحة الأحيائية للحلم ذو البقعتين Tetranychus urticae (Koch)‎ باستخدام عزلتين من الفطر Beauviria bassiana (Bals)‎ Vuill

Abstract EN

This study was conducted in Agri.

Coirege.Univ.of Basrah to evaluate the efficiency of the tow isolate of Beauveria bassiana (Bc,Bl)for controling the tow spotted spider mite on Tomato plants.

Laboratory experiment revealed that the tow isolate had significant effect on reducing the number of different instars of the spider mites.However,percentage of eggs mortality in bl isolate was 36.1% compared to 44.04% in Be isolate ,on the other hand the percentage of mortality of nymphal and adult instars after 72 hours of treatment was 92.7% for each isolates respectively.

Shaded place experiment also showed that both isolate reduced the number of mites from 28.2 to 1.7 mite7inch2 in Bl isolate and from 29 to 2.8 mite/inch2 in Be isolate after to days of treatment with spore suspensions.