河南省灰飞虱田间种群对12种杀虫剂的抗性现状分析

为明确河南省不同地区灰飞虱田间种群对12种常用杀虫剂的抗性现状，于2020—2021年，采用稻苗浸渍法分别测定了河南新乡、濮阳、开封、驻马店及信阳等地区灰飞虱田间种群对12种杀虫剂的抗性水平。结果表明:河南省灰飞虱田间种群对噻嗪酮产生了中等水平抗性，抗性倍数 (RR) =14.9~91.1；对吡蚜酮 (RR=6.91~16.7) 和毒死蜱 (RR=8.48~70.0) 产生了低至中等水平抗性；对三唑磷 (RR=1.29~11.1) 处于敏感至中等水平抗性；对噻虫嗪 (RR=0.95~5.19) 和高效氯氟氰菊酯 (RR=3.31~7.24) 处于敏感至低水平抗性；对吡虫啉 (RR=0.89~3.92)、啶虫脒 (RR=1.11~2.33)、烯啶虫胺 (RR=0.16~0.64)、呋虫胺 (RR=1.87~3.86)、异丙威 (RR=0.47~1.37) 和氟啶虫酰胺 (RR=1.63~4.33) 均仍处于敏感水平。研究结果可为河南省田间灰飞虱的可持续性防控以及杀虫剂的科学合理使用提供参考。

Resistance monitoring of the field populations of Laodelphax striatellus (Hemiptera: Delphacidae) to twelve insecticides in Henan Province of China

In order to clarify the insecticide resistance status in the field populations of the small brown planthopper (Laodelphax striatellus (Fallén)) from Henan Province, the resistances to 12 commonly used insecticides in seven field populations of L. striatellus collected from Xinxiang, Puyang, Kaifeng, Zhumadian, and Xinyang in Henan Province of China during 2020 to 2021 were detected by rice seedling dipping method. The results showed that the field populations of L. striatellus have developed medium-level resistance to buprofezin (resistance ratio, RR=14.9-91.1). Furthermore, the field populations produced low to medium-level resistance to pymetrozine (RR=6.91-16.7) and chlorpyrifos (RR=8.48-70.0) and were susceptible to medium-level resistance to triazophos (RR=1.29-11.1). In addition, all field populations of L. striatellus were susceptible or low-level resistance to thiamethoxam (RR=0.95-5.19) and lambda-cyhalothrin (RR=3.31-7.24), and relatively susceptible to imidacloprid (RR=0.89-3.92), acetamiprid (RR=1.11-2.33), nitenpyram (RR=0.16-0.64), dinotefuran (RR=1.87-3.86), isoprocarb (RR=0.47-1.37) and flonicamid (RR=1.63-4.33), respectively. The results shed light on the sustainable control of L. striatellus field population and scientific use of insecticides in Henan Province.