Field Trials of 25% Chlorpyrifos Microemulsion against Cnaphalocrocis medinalis

A field experiment was conducted to determine the efficiency of 25% chlorpyrifos microemulsion and 40% chlorpyrifos miniature creme to control Cnaphalocrocis medinalis Guenee.The results showed that,the medicament 25% chlorpyrifos microemulsion on Cnaphalocrocis Medinalis Guenee has the better control efficiency.The rice which was sprayed with medicament of 25% chlorpyrifos microemulsion growed more safely than other treatments.The medicament has no phytotoxicity to beneficial organisms.It was suggested that 468.75-562.5 g(active ingredient) of 25% chlorpyrifos microemulsion was used every hectare against Cnaphalocrocis medinalis Guenee.