FIELD TRIALS TO EVALUATE THE SUCCESSIVE SPRAYING WITH NATURAL MATERIALS ON Tetranychus urticae KOCK IN FESTING SOYBEAN PLANTS AT QALIOBIA GOVERNORATE

Two field experiments were conducted to study the effect of foliar application with different concentration of different types of organic materials on the mobile stages of Tetranychu surticae infesting soybean plants. The experiments were conducted in randomized complete block design with13treatments during the two successive seasons (2013 2014) at Qalubiya Governorate. The soybean plants were sprayed with 6 successive sprays, 15 days between each spray.The three lupines terms extract (L.T.Ex.) concentrations (0.01; 0.02 0.03%) gave good effects against the mobile stages of T. urticea.Also, results show that the bio organic liquid tea manure (M.Tea) with two concentration (5 10%) gave good effects against the mobile stages of T. urticae.On the other hand, mixed of lupines terms extract with three concentrations and M.Tea with two concentrations, gave good effects against the mobile stages of T. urticae comparing with unmixed compounds and its concentrations and recommended compound (Vertimic).Data show that the highest reduction of the mobile stages of T. urticea was 97%, as mean value, by M.Tea at the rate of 10% + L.T.Ex. at concentration of 0.02% or 0.03% when comparing with control. Vertimic gave 96% after 6 successive sprays against the mobile stages of T. urticae. In the second year, similar results are obtained with some exceptions. Statistical analysis show significant differences between the 12concentrations of the tested natural compounds and recommended compound (Vertimic) against the mobile stages of T. urticae.