Applied Technology of Botanical Pesticides against Empoasca pirisuga Matumura

[Objectives] The paper was to explore the control effects of different botanical pesticides against Empoasca pirisuga Matumura. [Methods] 5% Eucalyptol SL, 0.5% matrine SL and 50% thiacloprid WDG were used to control E. pirisuga , and the decline rate of insect population was investigated. [Results] Eucalyptol had good control effect on E. pirisuga , with slow effect but long duration. It was harmless to natural enemies in tea gardens, with high safety and no chemical injury. [Conclusions] The study provides a theoretical basis for the application of botanical pesticides in tea production.

几种植物源农药对两种茶树害虫的防治效果(英文)

[ Objective ] The paper was to study the effects of several botanical pesticides against two pests in tea plantation. [ Method] Using randomized block de- sign, different concentrations of botanical pesticides were sprayed during the young larvae periods of Ectropis oblique hmpulina Wehrli and peak periods of Empoasca pirisuga, the reduction rate of population and control effects were investigated after spraying for 1,3,7 and 10 d. [ Result] 5% rotenone EC 800 times had the best control effect against E. oblique hmpulina, and 0.5% veratridine soluble liquid 800 times had the best control effect against E. pirisuga. 0. 5% veratridine soluble liquid, 0.2% celangulin EC, 0.3% matrine water agent and 7.5% rotenone EC could be selected as the pesticides for the control of E. oblique hmpulina; 0. 5% veratridine soluble liquid, 0. 2% celangulin EC, 0.3% azadirachtin EC, 0.3% matrine water agent and 7.5% rotenone EC could be selected as the pesticides for the control of E. pirisuga, of which 0. 3% azadiraehtin EC 600 times showed the best durable effect against E. pirisuga with control effect of 100% after spraying for 7 d. [ Conclusion] The results provided basis for application of botanical pesticides in pests control in tea plantation.

植保无人机低空低容量喷雾在茶园的雾滴沉积分布及对茶小绿叶蝉的防治效果

为研究植保无人机低空低容量喷雾技术在实现茶园农药减量中的作用,通过在茶园喷施20%吡虫啉可湿性粉剂,比较其与传统大容量喷雾技术对茶小绿叶蝉Empoasca flavescens的防治效果。结果表明,使用3种植保无人机喷雾,安装有TEEJET110015#喷头的植保无人机的雾滴沉积密度为24.1～127.4个/cm^2,平均值为75.8个/cm^2,沉积量为0.002～1.15μg/cm^2,均值0.58μg/cm^2;安装有TEEJET11001#喷头的植保无人机的雾滴沉积密度为15.0～80.4个/cm^2,平均值为47.7个/cm^2,沉积量均值为0.01～1.38μg/cm^2,均值0.70μg/cm^2;安装有TEEJET11003#喷头的植保无人机的雾滴沉积密度为9.2～18.2个/cm^2,平均值为13.7个/cm^2;沉积量为0～1.14μg/cm^2,均值0.57μg/cm^2。农药利用率为49.3%～58.2%。使用3种传统器械喷雾,担架式动力喷雾机喷雾得到的沉积量为0.02～0.30μg/cm^2,均值0.16μg/cm^2,背负式手动喷雾器喷雾得到的沉积量为0.01～0.46μg/cm^2,均值0.23μg/cm^2,背负式电动喷雾器喷雾得到的沉积量为0.01～0.65μg/cm^2,均值0.33μg/cm^2。农药利用率为33.7%～39.6%。结果表明,3种植保无人机喷雾的农药沉积量和利用率均高于3种传统的施药器械,但其喷雾的均匀性还有待提高。施药后4 d,植保无人机低空低容量喷雾对茶小绿叶蝉防治效果为85.8%～90.4%,传统大容量喷雾对茶小绿叶蝉防治效果为91.8%～93.2%,两者差异不显著。药后10 d,前者对茶小绿叶蝉防治效果为72.9%～75.6%,后者防治效果为65.8%～71.6%,说明植保无人机低空低容量喷雾对茶小绿叶蝉的防治效果优于传统大容量喷雾。研究结果表明,植保无人机低空低容量喷雾有着更长的持效期,为茶园的农药减施增效提供了可能性。

茶园害虫新农药试验

应用3%啶虫脒可湿性粉剂、3%力比奇乳油对小绿叶蝉、角蜡蚧进行药效试验,结果表明,该药剂对供试茶园害虫具有较好的防治效果,其快速击倒力强,持效期较长,防治效果优于对照药剂,且对茶叶无药害,对茶园蜘蛛等天敌影响较小,是当前无公害茶叶生产中,防治茶园刺吸式口器害虫的一种较理想的选择药剂。

吡虫啉防治茶小绿叶蝉的试验

吡虫啉对茶树小绿叶蝉类有特效。在若虫高峰期，每公顷用１０％可湿性粉剂５２５～７５０克，对水１５００公斤喷雾，药后３天防效９３．７％以上，１５天内防效维持在９２．９％以上，持效期长达４０天。具速效和持效期长的特点。

四种药剂防治茶小绿叶蝉的药效

在成虫期 6 6 6 7m2 用 70 %杀螟丹 5 0g ,5 8%吡虫啉—杀螟丹混剂A( 1∶4 ) 5 0g,2 2 %吡虫啉—噻嗪酮混剂 ( 1∶4 ) 5 0g ,兑水 75kg,蓬面喷雾 ,对茶小绿叶蝉类药后 7天虫口减退率达 84 5 %～ 93 5 % ,2 0天内维持在 91 6 %以上。 1 0 %吡虫啉用药量偏低 ( 1 0g 6 6 6 7m2 ) ,2 0天的药效仍有 77 2 % ,具速效和持效期长的特点。

几种复配剂对茶小绿叶蝉田间防效

[目的]探讨复配制剂对茶小绿叶蝉（Empoasca flavescens）的防效。[方法]开展5种复配剂对茶小绿叶蝉的田间药效试验。[结果]5种复配剂对茶小绿叶蝉的速效性较好,药后7 d防效在90%~95%之间,有效控制期14 d左右,且单剂作用机制互不相同,药剂复配可有效克服或延缓抗药性,减少用药量,弥补单剂不足,协同发生作用。[结论]5种复配药剂对茶小绿叶蝉具有良好防效。