论文部分内容阅读
食菌瓢虫(Halyzia hauseri)以白粉菌为食料,实验证明可大量取食Phyllactiaia Cotytee. Podosphaera leucotricha和Erysiphe cichoracearum等白粉菌,1—4龄幼虫的总取食量为35.78cm~2,而第四龄幼虫的取食量最大为21.95cm~2成虫和幼虫一生取食量为480.97cm~2,室外试验证明在苹果白粉病叶上放养Halyzia hauseri幼虫,20d后防治效果达95.2％,而另一种瓢虫Vibidia duodecimguttata的防治效果为84.0％,因此可言利用瓢虫防治植物白粉病是很有希望的生物防治方法。
The powdery mildew was used as food material for Halyzia hauseri. It was proved that the total amount of food intake of Phylactia Cotytee, Podosphaera leucotricha and Erysiphe cichoracearum was 35.78cm ~ 2, The fourth-instar larvae had the maximum food intake of 21.95cm-2 and the larval feeding lifetime of 480.97cm-2. Outdoor tests showed that the Halyzia hauseri larvae were stocked on the leaves of apple powdery mildew and the control effect reached 95.2% after 20 days, A ladybug Vibidia duodecimguttata control effect of 84.0%, so the use of ladybugs can control powdery mildew is a promising biological control methods.