《环境昆虫学报》

为了研究油茶、茶树等经济树种重要食叶害虫茶黄毒蛾Arna pseudoconspersa Strand的化学防控效果和潜在农药残留风险，本研究采用叶片浸渍法测定了4种农药原药和4种农药制剂对茶黄毒蛾幼虫的室内毒力活性，并在油茶林间进行了无人机飞防试验，检验了防治效果以及防治7 d后油茶果实的农药残留情况。结果表明：4种农药原药成分对茶黄毒蛾幼虫的室内杀虫活性顺序依次为：甲维盐 > 阿维菌素 > 氯虫苯甲酰胺 > 虫酰肼，甲维盐处理1 d时的致死中浓度为0.42 mg/L；0.5%甲维盐微乳剂、4.5%高效氯氰菊酯水乳剂、6%联菊·啶虫脒微乳剂和12%噻虫·高氯氟悬浮剂均对茶黄毒蛾幼虫具有较强杀虫活性，4种农药制剂最低测试浓度处理3 d后死亡率在83.3% ~ 98.3%；10%噻虫·高氯氟悬浮剂飞防能够有效控制茶黄毒蛾数量；防控7 d后油茶籽粒均未检出农药残留，而油茶果皮中存在不同程度的高效氯氟氰菊酯残留。上述研究结果表明，甲维盐、噻虫·高氯氟等农药可以用于油茶林茶黄毒蛾防控，同时为相关害虫化学防控提供了参考依据。

英文摘要:

Arna pseudoconspersa Strand is an important leaf-eating pest of many economic trees, particularly Camellia species. It’s important to study the effects of its chemical control and the potential pesticide residue. In this study, the leaf immersion method was used to determine the indoor toxicity of four pesticide chemicals and four pesticide formulations upon larvae of A. pseudoconspersa. Moreover, aerial pesticide application with a unmanned aerial vehicle was carried out at the Camellia oleifera forest, followed by the detection of pesticide residues in fruits after seven days. Results showed that the indoor insecticidal activity of four pesticide ingredients ranged as emamectin benzoate > abamectin > chlorantraniliprole > tebufenozide. The median lethal concentrations (LC50) of emamectin benzoate treatment for 1 day was 0.42 mg/L. Four pesticides, including 0.5% abamectin-aminomethyl microemulsion, 4.5% beta-cypermethrin emulsion in water, 6% bifenthrin · acetamiprid microemulsion, and 12% thiamethoxam · lambda-cyhalothrin suspoemulsion (SE), all showed excellent insecticidal activity against the larvae of A. pseudoconspersa. The mortality rates ranged from 83.3% to 98.3% as the lowest tested concentration of the four formulations treated for 3 days. 10% Thiamethoxam · lambda-cyhalothrin SE could control the erupt of A. pseudoconspersa effectively through aerial pesticide application. Furthermore, no pesticide residues had been detected in the seeds of Camellia fruit after 7 days, while varying levels of lambda-cyhalothrin were detected in the peels. Thus, chemical pesticides, such as emamectin benzoate and thiamethoxam · lambda-cyhalothrin, could be used for the management of A. pseudoconspersa in Camellia tree forests, which would provide a scientific basis for the scientific prevention of related pests.

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