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本文研究了有机苹果园常用的6种杀菌剂,包括农抗120、绿乳铜、高锰酸钾、大生M-45、成标和多菌灵对果园重要害虫苹果黄蚜Aphis citricola van derGoot及其天敌异色瓢虫Harmonia axyridis Pallas死亡率的影响。结果表明,这6种杀菌剂使用喷雾和浸叶饲喂法对蚜虫的死亡率均有一定的影响,但校正死亡率均小于21%。喷雾处理和二次中毒处理对瓢虫幼虫的死亡率均无显著影响。上述结果说明6种供试杀菌剂的常用浓度对蚜虫有较低的致死率,而对其天敌异色瓢虫则是安全的,因此我们推测上述杀菌剂的常规使用不会对果园昆虫的群落结构造成重大影响。
In this paper, six kinds of fungicides commonly used in organic apple orchards were studied, including Aphis citricola van derGoot and Pesticide aphid, Pelargonium mongolicum, Effect of its natural enemy Harmonia axyridis Pallas on mortality. The results showed that all the six fungicides had a certain influence on the mortality of aphids, but the corrected mortality was less than 21%. Spraying and secondary poisoning had no significant effect on the mortality of ladybug larvae. The above results indicate that the commonly used concentrations of the six tested fungicides have a lower lethality to aphids and are safe to their predatory ladybird, so we speculate that the conventional use of the fungicides will not affect the orchard insect community The structure has a significant impact.