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首页> 外文期刊>Journal of Insect Physiology >Within-species variability of the response to 20-hydroxyecdysone in peach-potato aphid (Myzus persicae Sulzer)
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Within-species variability of the response to 20-hydroxyecdysone in peach-potato aphid (Myzus persicae Sulzer)

机译：种桃内对桃-马铃薯蚜（Myzus persicae Sulzer）响应的变化

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Phytoecdysteroids have been proposed as new tools for controlling crop pests because of their endocrine disruption and deterrent effects on insects and nematodes. There is increasing evidence of variability between taxa in sensitivity to phytoecdysteroids, but the genetic variability of this sensitivity within species is unknown. However, knowledge about this intraspecies variability is required for predicting evolution of the pest's response to new control methods. We assessed the variability of the response of the aphid Myzus persicae Sulzer, a major agricultural pest, to 20-hydroxyecdysone (20E). We determined the number of nymphs produced by six clones of M. persicae exposed to various concentrations of 20E and the capacity of these clones to detect 20E in choice experiments. High concentrations of 20E significantly decreased the number of nymphs produced for two clones and both increases and decreases in the number of offspring were detected at low concentrations. Two clones significantly avoided food with 20E, while one significantly preferred it, suggesting that 20E does not always act as a deterrent in this species. We conclude that genetic variability in the response to 20E exists in natural populations of M. persicae. The consequences of this finding on the sustainability of control methods using 20E are discussed.
机译：由于植物蜕皮激素的内分泌干扰和对昆虫和线虫的威慑作用，已提出将其作为控制农作物害虫的新工具。越来越多的证据表明，类群对植物蜕皮激素的敏感性存在变异性，但是这种敏感性在物种内部的遗传变异性尚不清楚。但是，需要有关此种内变异性的知识来预测有害生物对新控制方法的反应的演变。我们评估了蚜虫Myzus persicae Sulzer（一种主要的农业害虫）对20-羟基蜕皮激素（20E）的响应的变异性。我们确定了在不同浓度的20E中暴露的六个桃蚜分枝杆菌产生的若虫数量，以及这些克隆在选择实验中检测20E的能力。高浓度的20E显着减少了两个克隆产生的若虫数量，并且在低浓度下检测到后代数量的增加和减少。有两个克隆明显避免了20E的食物，而一个克隆则更偏爱20E，这表明20E并不总是对这种物种起威慑作用。我们得出的结论是，在自然界中存在的多年生稻瘟病菌对20E的反应具有遗传变异性。讨论了这一发现对使用20E的控制方法的可持续性的影响。

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