Wei Qi, Yu Hua-Yang, Niu Chun-Dong, Yao Rong, Wu Shun-Fan, Chen Zhuo, Gao Cong-Fen
College of Plant Protection, Nanjing Agricultural University, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China.
State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 550025, China.
J Econ Entomol. 2015 Jun;108(3):1251-9. doi: 10.1093/jee/tov063. Epub 2015 Apr 4.
Empoasca vitis (Göthe) is an important insect pest in tea-growing areas of China, and chemical control is the main tactic for the management of this pest. Due to the pressure of increasing insecticide resistance and more stringent food safety regulations, development of sound IPM strategies for E. vitis is an urgent matter. This study comparatively evaluated four field populations of E. vitis from three different tea-growing regions in China for their susceptibilities to eight insecticides using a simple leaf-dip methodology. E. vitis was found to be most sensitive to indoxacarb (LC50<0.5 mg/liter) and least sensitive to isoprocarb (LC50>5 mg/liter) and sophocarpidine (LC50>95 mg/liter, a botanical pesticide) regardless of populations. Population (geographical) variations were higher for indoxacarb and imidacloprid than other compounds. Judging by the 95% fiducial limits of LC50 values, all populations had similar susceptibilities to chlorfenapyr, bifenthrin, and acetamiprid or imidacloprid. Correlation analysis suggested that chlorfenapyr and indoxacarb or isoprocarb may have a high risk of cross resistance. Considering potency (LC50) and maximum residual levels, chlorfenapyr and bifenthrin are good insecticide options followed by acetamiprid and indoxacarb. These results provide valuable information to intelligently select insecticides for IPM programs that are efficacious against E. vitis while also managing insecticide resistance and maximum residual levels for tea production in China.
假眼小绿叶蝉（Göthe）是中国茶叶种植区的一种重要害虫，化学防治是治理该害虫的主要策略。由于杀虫剂抗性增加以及食品安全法规日益严格的压力，制定完善的假眼小绿叶蝉综合防治策略迫在眉睫。本研究采用简单的浸叶法，比较评估了来自中国三个不同茶叶种植区的四个假眼小绿叶蝉田间种群对八种杀虫剂的敏感性。结果发现，无论种群如何，假眼小绿叶蝉对茚虫威最为敏感（LC50<0.5毫克/升），对异丙威最不敏感（LC50>5毫克/升），对苦皮藤素（一种植物源杀虫剂，LC50>95毫克/升）也不敏感。茚虫威和吡虫啉的种群（地理）差异高于其他化合物。从LC50值的95%置信限判断，所有种群对氯虫苯甲酰胺、联苯菊酯以及啶虫脒或吡虫啉的敏感性相似。相关性分析表明，氯虫苯甲酰胺与茚虫威或异丙威可能存在较高的交叉抗性风险。综合药效（LC50）和最大残留限量考虑，氯虫苯甲酰胺和联苯菊酯是较好的杀虫剂选择，其次是啶虫脒和茚虫威。这些结果为明智地选择杀虫剂用于综合防治计划提供了有价值的信息，这些杀虫剂既能有效防治假眼小绿叶蝉，又能管理中国茶叶生产中的杀虫剂抗性和最大残留限量。
