Studies on the Effect of Controlling the Sunflower Moth by the Trichogramma
Yu Yun · Heilongjiang nongye kexue · 2010
The experiment that the sunflower moth was controlled by the trichogramma was conducted and the effects were analyzed in Gannan county of Qiqihar city of Heilongjiang province.The results showed the effective rate of the biological control was 61.97%.The difference between the grain damaged by pests and the damage rate were significant compared to the control.The yield was more 8.33% than the control and the ratio of input and output was 1∶41.