Field study of disolkyn insecticide comparing with other seven compounds

Field experiment of the effect of three sprays of two rates of the surfactant group of DSS (Disolkyn) at 98 ml and 131 3 ml / 100 L water compared with multiple mortality factors Bemistop, Pyroxifen, Imidacloprid, Pirimifos methyl Fenobucarb , Natural oil and Biosect belonging to Kirmon, I.G.R, chloronicotinyl O P, Carbamate, Veg oil and Entomopathoginic Fungi Beauvaria bassiane groups respectively against adult and immature stages of whitefly Bemisia tabaci (Genn,) infesting cotton and tomato plants and two sprays against aphids Myzus persicae infesting cotton ,tomato ,and soybean plants was carried out at Etay ElBaroud Agriculture Research Station , El-Behera governorate ,during March August 1999. According to the initial kill values, all tested insecticides gave the same efficacy level against adult stages of whitefly and aphids. However, Beauvaria bassiana (Biosect), gave the highest effect as the tested insecticides against adult stages of whitefly and aphids and moderate effect against immature stages of white fly Disolkyn at 98ml/100 L water was more effective as the other tested compounds after three sprayes on both white fly and aphids infesting cotton, tomato and soy bean plants. The Efficacy was higher on cotton plants followed by tomato plants. According to residual effect values of both white fly and aphids, the tested insecticide gave the same highest efficacy against both white fly adult and immature stages and aphids. Except Beauvæia bastsiana (Biosect) gave the highest effect against aphids, and moderate effect against whitefly immature stages. The highest effect was on cotton plants followed by tomato and soybean plants. DSS (Disolkyn) at 98 ml/ 100 L. water, the new compounds, Bemistop, Byroxifen, lmidaclopride, Natural oil, Biosect , that belong to DSS, Kirmon, iGR, Chloranicotinyl , Veg .0il and (Biosect) Beauvaria bossiana were leading to the tested materials in reducing both whitefly and aphid population. It can be concluded that Disolykn, a natural compound gave a high initial and residual effect on both whitefly and aphid, and could be included as useful tactic in a comprehensive aphid and whitefly management program in Egypt Development of a management program employing the different groups of insecticides would be a reasonable approach. This program would require a hierarchy of action thresholds. At low and moderate initial population of aphids and whitefly, Beauvaria bassima (Biosect) alone might be used successfully, delaying and minimizing the subsequent aphid and white fly population increase.