Study on the Prevention and Control of Sunflower Moth with Trichogramma sp.
Li Mi · Anhui nongye kexue · 2014
[Objective]The research aimed to provide basis for the production of sunflower. [Method]The species of Trichogramma against sunflower moth were screened out and the occurrence laws of sunflower moth were discussed. The relationship between the amount of Trichogramma in the field and the damage rate of sunflower was studied. [Result] The daily average parasitic rate of Trichogramma dendrolimi Matsumura Heilongjiang K-4 was 60. 72%,which was significantly higher than that of other three strains. When the releasing amount of T.dendrolimi was 675 000 heads /hm2,the control effect of T. dendrolimi against sunflower month was 61.47% and the input-output rate reached1∶ 38. The first flourishing stage of sunflower moth was accordant with the anthesis stage of sunflower. There was a good linear relationship between the amount of T. dendrolimi and the damage rate of sunflower. [Conclusion] T. dendrolimi had the function for the control of sunflower moth in the field,and it could enhance the yield of sunflower and reduce the application amount of pesticide.