摘要
[Objective] This study was conducted to select a batch of new high-effi- cient low-toxicity high-selectivity pesticides for the application in tea gardens. [Method] This experiment was designed with 12 treatments including clear water as the CK, in randomized block arrangement, with 4 replications, and each plot had an area of 30 m2. The pesticides were sprayed in the high occurrence period of larvae of tea lesser leafhopper when tea shoots grew vigorously. [Result] In the 11 pesti- cides, 100 g/L bifenthrin EC , 70% imidacloprid WDG and 150 g/L indoxacarb EC were the best pesticides with efficacies above 90%; and in the bio-pesticides, 0.5% azadirachtin SC showed an efficacy over 87.97%. [Conclusions] Among the tested pesticides, 100 g/L bifenthrin EC , 70% imidacloprid WDG and 150 g/L indoxacarb EC could effectively control tea lesser leafhopper during the outbreak of tea lesser leafhopper, and when the occurrence degree of tea lesser leafhopper is below the medium level, environment-friendly 0.5% azadirachtin SC, 0.5% veratrine SC, 0.3% matrine SC and 4.0×10^10 spores/g Beauveria bassiana OD could be selected.
[目的]通过田间药效试验,筛选出一批高效低毒、选择性较强的新药剂在茶园推荐应用。[方法]田间试验共设立药剂处理11个,1个对照,共12个处理,随机区组排列,重复4次,每小区面积30 m^2。于茶树新梢生长旺盛,茶小绿叶蝉正处于若虫发生盛期喷施药剂,调查防治后的效果。[结果]11种农药对茶小绿叶蝉防治中,100 g/L联苯菊酯乳油、70%吡虫啉水分散粒剂和150 g/L茚虫威乳油的防治效果最好,防效均达90%以上;生物农药中0.5%印楝素可溶性液剂防治效果87.97%以上。[结论]100 g/L联苯菊酯乳油、70%吡虫啉水分散粒剂、150 g/L茚虫威乳油在茶小绿叶蝉大发生时,可有效控制其危害,而在茶小绿叶蝉发生程度在中等程度以下时,可选用0.5%印楝素可溶性液剂、0.5%藜芦碱可溶性液剂、0.3%苦参碱可溶性液剂、400亿孢子/g球孢白僵菌可分散油悬浮剂这类环境友好的生物杀虫剂。
基金
Supported by Project from Anhui Academy of Agricultural Sciences(16A1133)
