Characteristics and Application Methods of the Orchid Insecticide Fenvalerate

Also known as sumicidin, JS~5602, and dichlorophenyl chrysanthemate, it is a pyrethroid insecticide, a new variety developed by the Japanese Sumitomo Chemical Company in 1973. It acts mainly by contact poisoning, and also has stomach-poison, ovicidal, and antifeedant effects. It has good efficacy against cabbage worms (caterpillars) that are resistant to some organochlorine and organophosphate insecticides. It has no systemic or fumigant action. Its control effect on mites is relatively poor, it is unstable under alkaline conditions, and it is highly toxic to bees. Formulation: 20% emulsifiable concentrate. Target pests and application methods: Spraying must be thorough and even. For aphids, leafhoppers, and thrips, use a 2000-3000 times dilution; for lepidopteran leaf-eating pests, use a 1500-2000 times dilution. (Liu Zhongjian)