Control Effect of Trichogramma japonicum on Chilo suppressalis in Rice

The experiment and demonstration of artificially releasing Trichogramma japonicum were conducted in rice field to control Chilo suppressalis in 2012. Three treatments of parasitoids-releasing field, farmers' self-controlling field and contrast were set up in this experiment. The date of realising Trichogramma japonicum is during the beginning peak hatching period of Chilo suppressalis.The rice area is 6 670 m2 and 3 times releasing, the total amount of Trichogramma japonicum are 300 000. The results indicated that the average insect damaged plant rate was 3.28%, the average control effect was 79.62%. It is important to release Trichogramma japonicum to control the Chilo suppressalis, protect the ecological environment of paddy fields and improve rice quality.