Liu Jia, Lincoln Tamra, An Jingjie, Gao Zhanlin, Dang Zhihong, Pan Wenliang, Li Yaofa
Plant Protection Institute, Hebei Academy of Agricultural and Forestry Sciences/ IPM Center of Hebei Province/ Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China, Ministry of Agriculture, Baoding 07100, China (
USDA ARS BCIRL, 1503 S. Providence, Research Pk., Columbia, MO (
J Econ Entomol. 2016 Aug;109(4):1846-52. doi: 10.1093/jee/tow082. Epub 2016 May 17.
The effect of temperature on the cotoxicity coefficient (CTC) value was used to evaluate mixture efficacy of different temperature coefficient chemicals from 15 to 35°C by exposing third-instar Apolygus lucorum (Meyer-Dür) to dip-treated asparagus bean pods. The results indicated the joint toxicity of same temperature coefficient insecticide (TCI) types were unaffected by temperature. This means that even when temperatures change, the mixture ratios of the highest CTC values remained the same, and the effect of temperature on the joint toxicity of same TCI types was only on the CTC values. However, the effect of temperature was variable when considering the joint toxicity of different TCI types. The effect of temperature on the joint toxicity of both strong positive and strong negative TCI types was clear, and the highest CTC values of mixture ratios changed with temperature regularly. When comparing the influence of temperature between strong/slight positive/negative insecticides, the results indicated a greater influence of the strong TCI. Paradoxically, the highest CTC value of the imidacloprid and methomyl mixture did not change with temperature changes consistently, even with the variance of imidacloprid ratios, a strong TCI. These results will guide pest managers in choosing the most effective insecticide mixtures for A. lucorum control under given environmental conditions.
通过将三龄绿盲蝽暴露于经浸液处理的豇豆荚上，利用温度对共毒系数（CTC）值的影响来评估15至35°C下不同温度系数化学药剂的混合药效。结果表明，相同温度系数杀虫剂（TCI）类型的联合毒性不受温度影响。这意味着即使温度发生变化，最高CTC值的混合比例仍保持不变，且温度对相同TCI类型联合毒性的影响仅体现在CTC值上。然而，在考虑不同TCI类型的联合毒性时，温度的影响是可变的。温度对强正性和强负性TCI类型的联合毒性影响明显，混合比例的最高CTC值随温度有规律地变化。在比较强/弱正性/负性杀虫剂之间温度的影响时，结果表明强TCI的影响更大。矛盾的是，吡虫啉和灭多威混合物的最高CTC值并未随温度变化而始终一致地改变，即使吡虫啉比例存在差异，吡虫啉是一种强TCI。这些结果将指导害虫防治人员在给定环境条件下选择最有效的杀虫剂混合物来防治绿盲蝽。
