A 2-year commercial-scale study was conducted to qualitatively evaluate the effect of different insecticide treatment regimes on the predator complex attacking Bemisia tabaci (Gennadius) in cotton. In 1996 three insecticide regimes were compared: a rotation of conventional broadspectrum insecticides or one of two different regimes based on the initial use of the insect growth regulators (IGRs),...

introduction: rose plant (r osa hybrid) is cultivated in nearly all regions of iran and they are more common in the western areas of iran. the intensive cultivation of rose often leads to injuries by pathogens or noxious animals and may require the implementation of pest control measures. among the insect pests of roses, the greenhouse whitefly, trialeurodes vaporariorum (westwood) (hem.: aleyr...