几种农药防治茶小绿叶蝉药效试验

Efficacy Experiment of Controlling Tea Leafhopper with Several Kinds of Pesticides

[目的]为探讨不同农药对茶小绿叶蝉的防治效果。[方法]以700、800、1000倍0．3％印楝素乳油，2500、2800、3000倍茶联苯，2500、3000、3500倍万里红为供试药剂，对茶小绿叶蝉进行田间药效试验。[结果]茶联苯3种浓度药后1d防效分别为99．37％、90．35％、82．31％，药后4d防效分别为97．56％、85．59％、71．87％。0．3％印楝素乳油3种浓度药后1d防效较差，药后4d防效达高峰，分别为90、81％、80．72％、70．92％。万里红3种浓度药后1d防效分别为87．43％、69．97％、60．02％，药后4d防效显著降低。[结论]茶联苯2500～2800倍液防治茶小绿叶蝉有很好的速效性和持效性，0．3％印楝素乳油700～800倍液施药4d后防效显著，且对天敌杀伤力小，是防治茶小绿叶蝉的理想药剂。2种药剂正常施药后不产生药害，可以用来防治茶小绿叶蝉。

[Objective] The purpose of this study was to discuss the control effects of different pesticides on tea leailaopper. [Method] With 0.3% azadirachtin emulsion diluted to 700,800 and 1 000 times, tea biphenyl diluted to 2 500,2 800 and 3 000 times,Wanlihong diluted to 2 500,3 000 and 3 500 times as tested pesticides,the field efficacy experiment was conducted on tea leathopper. [Result] The control effects of tea biphenyl with 3 kinds of concentrations were 99.37% ,90.35% and 82.31% resp.on the 1st day after application and 97.56% ,85.59% and 71.87% resp.on the 4th day after application. The control effects of 0.3 % azadirachtin enmlsion with 3 kinds of concentrations were worse on the 1 st day after application, and reached the peak on the 4th day after application, being 90.81%, 80.72% and 70.92% resp. The control effects of Wanlihong with 3 kinds of concentrations were 87.43% ,69.97% and 60.02% resp.on the 1st day after application and reduced significantly on the 4th day after application. [Conclusion] Controlling tea leaflaopper with tea biphenyl diluted to 2 500 -2 800 times bad very good availability and persistence. The control effects of 0.3 % azadirachtin emulsion diluted to 700800 times was significant on the 4th day after application and had little lethality to its natural enemy,which was perfect pesticide for controlling tea leaflaopper. The 2 kinds of pesticides produced no pesticide injury after normal application and could be used to control tea leaflaopper.