农药助剂对啶虫脒防治白瓜烟粉虱的影响

Influence of Pesticide Adjuvants on the Prevention and Control of Bemisia tabaci in Cucurbita pepo L. with Acetamiprid

【目的】探究有机硅、混合橙精油、青皮桔油、激健4种助剂对啶虫脒防治烟粉虱的增效作用及有机硅3000倍液对啶虫脒防治烟粉虱的减量效果。【方法】试验采用喷雾法,有机硅3000倍液、混合橙精油1000倍液、青皮桔油1000倍液、激健3000倍液分别与5%啶虫脒乳油推荐用量混用,测定药液的雾滴密度、雾滴覆盖率对烟粉虱防效及有机硅3000倍液对啶虫脒防治烟粉虱的减量效果。【结果】在5%啶虫脒乳油推荐用量药液中添加助剂可提高药液的雾滴密度,但不同助剂与5%啶虫脒乳油推荐用量混用对烟粉虱的防效不同,其中有机硅对啶虫脒防治烟粉虱的增效明显,持效期长,青皮桔油次之,而混合橙精油与啶虫脒的混合液对烟粉虱的防效与清水对照无显著差异。在5%啶虫脒乳油中加入农用有机硅,能提高啶虫脒对烟粉虱的防效并减少5%啶虫脒乳油10%~40%的施用量。【结论】生产上建议使用农用有机硅3000倍液与5%啶虫脒乳油混用防治烟粉虱。

【Objective】The tests were conducted to evaluate the synergistic effects of four kinds of additives,namely,organosilicon,mixed orange essential oil,green peel orange oil and Jijian,on field control efficacy of acetamiprid against Bemisia tabaci,and to evaluate the decrement effects of 3000-fold dilution of organosilicon on field control efficacy of acetamiprid against B.tabaci.【Method】The field efficacy trials were conducted by spraying.The recommended dose of 5% acetamiprid EC was mixed with organosilicon 3000-fold dilution,orange essential oil 1000-fold dilution,green peel orange oil 1000-fold dilution and Jijian 3000-fold dilution,respectively,to determine the control efficacy of droplets density and coverage rate of acetamiprid on B.tabaci and the decrement effects of 3000-fold dilution of organosilicon on field control efficacy of acetamiprid against B.tabaci.【Result】The results showed that the recommended dose of 5% acetamiprid EC mixed with additives could increase the droplets of the liquid.However,the recommended dose of 5% acetamiprid EC mixed with different additives showed different control effects to B.tabaci.Among the tested additives,the organosilicon had obvious synergistic effect and long persistent on acetamiprid against B.tabaci,followed by green peel orange oil,and there was no significant difference between the mixed solution of orange essential oil and acetamiprid EC and branch water.5% acetamiprid EC mixed with organosilicon could improve the control effect of B.tabaci,and reduce the application amount of 10%-40%.【Conclusion】5% acetamiprid EC mixed with organosilicon 3000-fold dilution can be used for the prevention and control of B.tabaci in practice.