阿维菌素复配剂防治水稻二化螟田间应用评价

阿维菌素分别与三唑磷、毒死蜱和杀虫单复配 ,在田间防治抗性二化螟 ,效果理想 ,14天的效果达 90 %左右。

20%氯虫苯甲酰胺SC防治水稻二化螟药效试验

通过对氯虫苯甲酰胺等几种防治二化螟的药剂的防效比较试验,结果表明,20%氯虫苯甲酰胺SC依然是防治二化螟为害的首选高端药剂之一,防效高,持效长,对水稻安全。建议在二化螟孵化盛期用药,推荐使用剂量20%氯虫苯甲酰胺SC150mL/hm2。

2种助剂对水稻二化螟防治的减施增效作用

为探究增施农药助剂对化学农药防治的减施增效作用,开展了水稻二化螟的田间试验.结果表明,配施的2种农药助剂都具有减少化学农药用量的作用,并且防效都较好.常量处理、减量30%+酸性电解水处理、减量50%+酸性电解水处理、减量30%+激健处理、减量50%+激健处理的投入产出比分别为1∶18.27, 1∶14.33, 1∶15.17, 1∶18.16, 1∶19.43,减量30%或50%+酸性电解水处理的投入产出比略低于常量处理,减量30%或50%+激健处理的投入产出比与常量处理相当,可实现药剂减施后水稻二化螟的防治效果及保产效果与常规用量时相当.

Main Rice Pests Control with Trichogramma japonicum

This study used Trichogramma japonicumto to control Chilo suppressalis （Walker） and Cnaphalocrocis medinalis（Guenée）, and tested the effects of different control methods on main rice pests, natural enemies and rice yield. The results revealed that the parasitism of Trichogramma japonicum in the eggs of Chilo suppressalis （Walker） and Cnaphalocrocis medinalis （Guenée） reached 60.3% and 57.1%, and the control efficacy was up to 70.8 % and 91.99%, respectively. The control efficacy for Cnaphalocrocis medinalis （Guenée） was much better. This biological control method could be equivalent to chemical control method in the control effects on main pests in rice. The yield under the biological control was 26.5% higher than that of the control group, and the biological control had a signifcant increase in the number of natural enemies such as spider, up to 400 per 100 plants. Therefore, the sustainable prevention and control were achieved in the presentence with natural enemy organism.