Abstract: This new method to control the pests, army worm moth, with the chemo-sterilant TH-6040 has been researched in laboratory since 1980. The insects was fed in Mitlin ways. The results showed that the sterility rate of moth eggs reached up to 99.8% when male and female adults within 1 day after their emergence were treated at concentrations of 5-50ppm, and sterility rates of 99.4-99.0% and 99.6-99.1% were produced when the adults were 3 days after emergence treated at the same concentrations. The effectiveness was quite remarkable and seemed to be independent obviously from days of moth emergence. The results have also the importance and value in practical use for c-ontrolling the migratory army worm moth.

Key words: Chemosterilant TH-6040, Armyworm moth, Sterility