NARO Kyushu Okinawa Agricultural Research Center, Koshi, Japan.
Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan.
Pest Manag Sci. 2018 Feb;74(2):456-464. doi: 10.1002/ps.4729. Epub 2017 Nov 2.
The two rice planthoppers, Nilaparvata lugens and Sogatella furcifera, have different life cycles in the regions of East Asia, the Red River Delta, and the Mekong Delta. The susceptibilities of these species to a range of insecticides have not previously been compared among the three regions over multiple years. Here, we describe the differences and similarities in insecticide susceptibilities of the two species among the three regions in 2006-2011.
In all three regions in 2006 - 2011, N. lugens developed high and moderate levels of resistance to imidacloprid and thiamethoxam, respectively, but this species did not develop resistance to fipronil. In contrast, S. furcifera developed a high level of resistance to fipronil. The ranges in 50% lethal dose (LD ) values for N. lugens treated with both imidacloprid and thiamethoxam were similar over time between East Asia and the Red River Delta, and were different in the Mekong Delta.
The results support the idea that resistant populations migrate from the Red River Delta region to East Asia. Therefore, continuous monitoring of the susceptibility of N. lugens to insecticides in the Red River Delta is very important for insecticide resistance management in East Asia. © 2017 Society of Chemical Industry.
褐飞虱和白背飞虱在东亚、红河三角洲和湄公河三角洲地区的生活周期不同。这两个物种对一系列杀虫剂的敏感性在过去几年中尚未在这三个地区进行过比较。在这里，我们描述了 2006-2011 年间这两个物种在三个地区的杀虫剂敏感性的差异和相似之处。
在 2006-2011 年期间，在所有三个地区，褐飞虱对吡虫啉和噻虫嗪分别产生了高水平和中高水平的抗性，但该物种对氟虫腈没有产生抗性。相比之下，白背飞虱对氟虫腈产生了高水平的抗性。东亚和红河三角洲地区，褐飞虱对吡虫啉和噻虫嗪处理的 50%致死剂量（LD）值随时间的变化范围相似，而在湄公河三角洲地区则不同。
结果支持抗性种群从红河三角洲地区迁移到东亚的观点。因此，对红河三角洲地区褐飞虱对杀虫剂敏感性的持续监测对东亚地区的杀虫剂抗性管理非常重要。 © 2017 化学工业协会。
