甲维盐、绿颖复合液防治茶尺蠖、茶橙瘿螨的药效试验研究

Study on the Control Effects of the Mixture of Emamectin Benzoate and Ensprayagainst Ectropis Obliqua Warren or Acaphylla Theae Walt

【研究目的】研究生物源农药甲维盐与矿物油绿颖复合液对茶园主要害虫茶尺蠖、害螨等防治效果。【方法】应用3000倍甲维盐,300倍绿颖复合液;2500倍甲维盐、250倍绿颖复合液与两种化学农药1000倍乙硫磷、1000倍乐果,于广西桂北茶园茶尺蠖第二代孵化高峰及茶橙瘿螨第一次高峰前期进行田间防效小区对比试验。【结果】3000倍甲维盐、300倍绿颖复合液;2500倍甲维盐、250倍绿颖复合液对茶尺蠖的防效:药后2天分别为82.46%～87.78%,7天达93.95%～97.36%,药后40天后仍达83.33%～88.39%。而对比的化学农药1000倍乙硫磷、1000倍乐果药后2天为81.78%～76.32%药后7天为77.97%～75.45%。药后30天的虫口基数已接近开始防治前1天的虫口基数,防治茶橙瘿螨的药效:3000倍甲维盐、300倍绿颖复合液;2500倍甲维盐、250倍绿颖复合液药后2天分别为85.15%～89.13%,药后21天为96.91%～98.70%,药后40天仍达93.84%～95.59%,而对比的化学农药1000倍乙硫磷及1000倍乐果药后2天为90.07%～71.81%,药后21天仅为35.35%～31.17%。药后30天的虫口基数已接近开始防治前1天的虫口基数。【结论】甲维盐与绿颖复合液对茶尺蠖及橙瘿螨等茶园害虫、害螨有良好防效及较长的持效期,可作为生态友善型农药在无公害茶园生产基地推广使用。

[OBJECTIVE] Study on the control effects of the mixture of Emamectin Benzoate and Enspray against Ectropis obliqua warren or AcaphyUa theae walt. [METHOD]To do the Comparison Experiment by using two kinds of mixture, 3000 times Emamectin Benzoate and 300 times Enspray, 2500 times Emamectin Benzoate and 250 times Enspray, and using two kinds of agricultural chemicals,1000 times ethion and 1000 times dimethoate, before the High Day for the second generation of Ectropis oblique and the first peak of Acaphylla theae walt in the north of Guangxi province.[RESULTS]The Control Effects of the two kinds of mixture against Ectropis obliqua on 2st, 7rd, 40th days later： 82.46%-87.78%,93.95%-97.36%,83.33%-88.39%. And the control effects of the two kinds of agricultural chemicals against Ectropis obliqua on 2st, 7rd： 81.78%-76.32%, 77.97%-75.45%. The number of worms 30th later is as same as before using the chemicals. The control effects of the two kinds of mixture against Acaphylla theae walt on 2st, 21th, 40th days later： 85.15%-89.13%, 96.91%-98.70%, 93.84%-95.59%. And the Control Effects of the two kinds of agricultural chemicals against AcaphyUa theae walt on 2st, 21th： 90.07%-71.81%, 35.35%-31.17%.the number of worms 30th later is as same as before using the chemicals. [CONCLUSION] the Mixture of Emamectin Benzoate and Enspray have good control effects and long lasting time against Ectropis obliqua warren or Acaphylla theae walt, and can be extended on tea-Harmless production.