几种农药对荔枝蒂蛀虫卵和成虫的触杀作用及田间药效

Contact toxicity and field trial efficiency of several pesticides on the eggs and adults of Conopomorpha sinensis Bradley

【目的】筛选对荔枝蒂蛀虫卵和成虫有高效触杀作用的药剂,为荔枝蒂蛀虫防治提供科学依据。【方法】分别采用浸渍法和药膜法进行不同药剂对荔枝蒂蛀虫卵和成虫的室内毒效测定,筛选出高效药剂后进行田间药效试验;田间药效试验按常规方法进行。【结果】3.2%甲维盐·氯氰2000倍、44%氯氰·丙溴磷1000倍、4.5%高效氯氰菊酯1000倍、48%乐斯本1000倍、52.25%农地乐1000倍、40%丙溴磷1000倍、20%三唑磷1000倍7种药剂处理对荔枝蒂蛀虫成虫的12h触杀死亡率均为100.00%,对卵的触杀效果除40%丙溴磷和20%三唑磷外均为100.00%。田间药效试验所用的7种药剂共13个处理中,防治效果在80.00%以上的有12个,90.00%以上的有8个。【结论】13%高氯·唑磷乳油、22%毒死蜱·氯氰乳油、4.5%高效氯氰菊酯乳油、5%氯氰菊酯乳油、48%乐斯本乳油、40%毒死蜱乳油6种药剂对荔枝蒂蛀虫有很好的防治效果,可供生产中大面积防治时使用;3.2%甲维盐·氯氰微乳剂、44%氯氰·丙溴磷乳油、52.25%农地乐乳油亦可作为果园防治的备选用药。

[Objective]The experiment was conducted to screen some pesticides with high contact toxicity to eggs and adults of Conopomorpha sinensis in order to develop scientific control measures for C.sinensis.[Method]The toxicity effects of several pesticides on the eggs and adults of C.sinensis were tested by using immersion and drug membrane methods.The effects of screened pesticides with high contact toxicity were determined in filed by using conventional methods.[Result]The application of seven pesticides（3.2% Emamectin benzoateo·Cypermethrin 2000 times dilution,44% Cypermethrino·Profenofos 1000 times dilution,4.5% Cypermethrin 1000 times dilution,48% Chlorpyrifos 1000 times dilution,52.25% Chlorpyrifoso·Cypermethrin 1000 times dilution,40% Profenofos 1000 times dilution and 20% Triazophos 1000 times dilution） on adults of C.sinensis resulted in 100% mortality rate in 12 hours.At the same time,the contact toxicity effects of all pesticides,except 40% Profenofos and 20% Triazophos,on eggs of C.sinensis reached 100%.Among 13 treatments,the control effects of 12 treatments in field were more than 80% and the control effects of 8 treatments in field were more than 90%.[Conclusion]Effects of six kinds of pesticides（13% Beta cypermethrino·Triazophos EC,22% Chlorpyrifoso·Cypermethrin EC,4.5% Beta cypermethrin EC,5% Cypermethrin EC,48% Chlorpyrifos EC and 40% Chlorpyrifos EC） were found to be better in orchard.They may be used in large-scale production system.3.2% Emamectin benzoateo Cypermethrin ME,44% Cypermethrino Profenofos EC and 52.25% Chlorpyrifoso·Cypermethrin EC may be used as alternative control agents in orchards.