Effect of plant extracts and some biorational insecticides on egg hatch, survival and predation rates of Menochilus sexmaculata (Fabrieius) and Coccinella trasversalis Fabricius:the key natural enemies of cruciferous vegetable aphids in south Chin
Abstract:One of the mechanisms that plants have developed to resist the effects of herbivorous pests is the production of secondary metabolites. Recently these metabolites have been considered as potential alternatives to synthetic pesticides because they are natural products that are active against insect pests while being compatible with the environment because of their low-toxicity to humans, livestock and natural enemies. In southern China the problems of resistance, resurgence and residue associated with the us...