烟蚜防治药剂筛选及其对异色瓢虫的安全性评价

苏建东; 王志刚; 宗浩; 杨杰; 刘勇; 谭效磊; 朱先志; 刘莉; 徐蕊; 高强

doi:10.13496/j.issn.1007-5119.2017.04.012

烟蚜防治药剂筛选及其对异色瓢虫的安全性评价

Screening of Insecticides for the Control of Myzus persicae and Safety Evaluation to Its Predator Harmonia axyridis

摘要

摘要: 采用喷雾法测定了5种烟草推荐使用药剂对烟蚜Myzus persicae（Sulzer）及其天敌异色瓢虫Harmonia axyridis（Pallas）3龄幼虫及成虫的毒性，并就各药剂对异色瓢虫的安全性进行了评价。结果表明，5%阿维菌素、3%啶虫脒、70%吡虫啉、1%苦参碱和50%吡蚜酮对烟蚜的LC₅₀分别是7.75、9.20、23.07、24.85和40.63 mg/L。对异色瓢虫3龄幼虫，3%啶虫脒的毒性最高LC₅₀为7.84 mg/L，其次为5%阿维菌素，50%吡蚜酮毒力最低LC₅₀为270.66 mg/L。对异色瓢虫成虫，3%啶虫脒的毒性最高LC₅₀为17.00 mg/L，其次为5%阿维菌素，50%吡蚜酮最低LC₅₀为541.33 mg/L。结合安全系数和益害比，1%苦参碱、50%吡蚜酮对烟蚜和异色瓢虫的选择性较高，适宜在田间与异色瓢虫组合应用防控烟蚜。

Abstract: The toxicity of five tobacco recommended pesticides on Myzus persicae (Sulzer)(Hemiptera:Aphididae) and three instars and adults of its predatory natural enemy Harmonia axyridis (Pallas) was determined by means of spray, and the safety to the ladybirds was also evaluated. The results showed that the LC₅₀ of 5% abamectin, 3% acetamiprid, 70% imidacloprid, 1% matrine, and 50% pymetrozine were 7.75, 9.20, 23.07, 24.85, and 40.63 mg/L respectively. In addition, the toxicity of 3% acetamiprid on three instars Harmonia axyridis was the highest, with the LC₅₀ being 7.84 mg/L,and then was 5% abamectin, the toxicity of 50% pymetrozine was the lowest, which was 270.66 mg/L. The toxicity of 3% acetamiprid on Harmonia axyridis adults was the highest, and the LC₅₀ was 17.00 mg/L, and then was 5% abamectin, the toxicity of 50% pymetrozine was the lowest, which was 541.33 mg/L. According to toxicity ratio and safety coefficient, 1% matrine and 50% pymetrozine had high selectivity to M. persicae and H.axyridis, and they are suitable for using alternately with H.axyridis in controlling M. persicae.

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