Abstract:
Over-reliance on insecticides has resulted in resistance problems, ecological disturbances and higher costs to the growers. Treatments with conventional insecticides did not, in many cases, achieve comprehensive control because of the presence of immature stages and adults on the underside of the leaves and of the rapid development of resistance to insecticides. Novel insecticides, including buprofezin, pyriproxyfen, diafenthiuron, and imidacloprid with different modes of action, have been introduced recently for controlling Bemisia (Hemiptera: Homoptera: Aleyrodidae) in cotton and other crops. These insecticides are more effective than conventional insecticides for controlling developmental stages and are less toxic to mammals and the environment than conventional insecticides. The Israeli IPM-IRM strategy, introduced in cotton in 1987, has focused primarily on controlling Bemisia with novel insecticides. A rotation scheme in which each insecticide is used once during one pest-generation followed by alternation with another one with a different mode of action has been established. Use of conventional insecticides, including pyrethroids, is complementary.