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首页> 外文期刊>Journal of Economic Entomology >Resistance monitoring and assessment of resistance risk to pymetrozine in laodelphax striatellus (Hemiptera: Delphacidae)
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Resistance monitoring and assessment of resistance risk to pymetrozine in laodelphax striatellus (Hemiptera: Delphacidae)

机译：灰飞虱（Laodelphax striatellus）（半翅目：Delphacidae）的耐药性监测和耐药性风险评估

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摘要

Laodelphax striatellus (Fallén) is a major pest of cultivated rice. Pymetrozine, a pyridine azomethine compound, represents a novel insecticide with a selective activity against sucking pests. The resistance of L. striatellus to thiamethoxam, nitenpyram, chlorpyrifos, and pymetrozine in five field populations, collected from Jiangsu, Anhui, and Zhejiang in China, was monitored from 2009 to 2011 in laboratory. All the populations kept susceptible to minor resistance to thiamethoxam and nitenpyram in the 3 yr (0.6-to 2.2-fold and 0.8-to 3.8-fold, respectively), while the insects developed low to high level resistance to chlorpyrifos (9.7-to 76.1-fold). Three populations were all susceptible to pymetrozine (1.1-to 2.1-fold) in 2009, but the Wuxi and Yancheng populations developed low level resistance to pymetrozine (5.5-fold and 5.3-fold, respectively) in 2011. Meanwhile, the resistance level of the selected strain reared in laboratory increased by 1.0-fold after 12-generation selection with pymetrozine. The realized heritability (h~2) of resistance at different selection stages was estimated as 0.0470 (F1 to F13) and 0.2070 (F5 to F13) by using threshold trait analysis. It suggested that L. striatellus had the definite risk of resistance to pymetrozine.
机译：Laodelphax striatellus（Fallén）是栽培稻的主要害虫。吡啶甲亚胺化合物Pymetrozine代表了一种新型的杀虫剂，对吮吸有害生物具有选择性。在2009年至2011年的实验室中，监测了五个田间种群中的纹状体梭菌对噻虫嗪，乙胺嘧啶，毒死rif和嘧啶的抗药性。在3年中，所有种群对噻虫嗪和尼替吡兰的抵抗力均较弱（分别为0.6至2.2倍和0.8至3.8倍），而昆虫对毒死rif的抵抗力则为低至高水平（9.7至76.1） -折）。 2009年，有3个种群均易受pypytrozine的影响（1.1到2.1倍），但2011年无锡和盐城种群对pypytrozine的抵抗力较低（分别为5.5倍和5.3倍）。在用吡me嗪进行12代选择后，在实验室中饲养的所选菌株增加了1.0倍。通过阈值特征分析，在不同选择阶段的抗性的实现遗传力（h〜2）估计为0.0470（F1至F13）和0.2070（F5至F13）。这表明纹状体乳杆菌对吡咯乙嗪具有确定的抗药性风险。

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