飞机超低量喷洒保松灵防治松材线虫病

Controlling pine wilt disease by means of aircraft spray of PEM with ultra-low-volume

用配置HY 1型风动式超低量雾化器的海燕 65 0C型飞机 ,喷洒乳化药液 (保松灵∶水=1∶2 ,体积比 ) 3 0 0～ 3 75L·hm-2 ,能有效地杀死松墨天牛成虫 ,达到降低松材线虫病的目的。试验表明 :喷洒保松灵的林地 ,当年松树枯死率比上一年平均下降 37 4% ;当年松树枯死率比对照林地下降 1 5 3 0 % ;6月中旬飞防松树枯死率可下降 64 0 %。保松灵防治松材线虫病的机制是 :①击倒松墨天牛成虫 ,喷雾 45min后 ,成虫死亡率 1 0 0 % ;②是胃毒作用 ,用喷雾 1 7d后松枝条饲喂松墨天牛成虫 ,死亡率为 1 0 0 %。表 7参 1

The sea swallow 650 C plane carried with a set of HY 1 model wind power spraying machine could spray PEM,a new kind of pesticide which means the pine trees could be exempted from mortality,smoothly on pine forest by means of aerial ultra low volume spray,3 00～3 75 L·hm -2 ( v PEM ∶ v water =1∶2).The adults of Monochamus alternatus could be effectively killed by PEM,by the both way of stomach poison and contact kill.The rate of contact kill to the adults reached 100%.The rate of stomach poison to feeding adults reached 100%,with pine branches after 17 days spraying PEM.The absolute mortality rate of pine trees in the pine forest infected by the pine wilt disease,decreased by 37 7%,comparing with that pine forest without praying PEM.The relative mortality rate of pine trees decrease by 153%.The best spray dates were in the mid June,during which the absolute mortality rate of pine trees decreased by 64 0%.