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首页> 外文期刊>Journal of Economic Entomology >Sublethal Effects of Insect Growth Regulators on Boll Weevil (Coleoptera: Curculionidae)
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Sublethal Effects of Insect Growth Regulators on Boll Weevil (Coleoptera: Curculionidae)

机译：昆虫生长调节剂对蒴果（鞘翅目：Curculionidae）的止血作用

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摘要

Immature stages of the boll weevil, Anthonomus grandis grandis Boh. (Coleoptera: Curculionidae), develop protected inside cotton fruiting structures. Therefore, the adult beetles have become the main target of insecticide applications. The use of insect growth regulators (IGRs) is recommended against immatures, even though they may also affect the survival and reproductive traits of adult insects. The present study evaluated the impact of a juvenile hormone analog (pyriproxyfen), an ecdysteroid agonist (methoxyfenozide), and a chitin biosynthesis inhibitor (lufenuron) on adult cotton boll weevils, a key cotton pest. Mated and virgin beetles were treated by feeding them contaminated squares and cotton leaf discs that were previously immersed into pyriproxyfen, methoxyfenozide, and lufenuron solutions at field-rate concentrations. After exposure, treated couples were caged onto cotton plants, and survival, fecundity, and egg viability were evaluated. The IGRs neither affected the survival nor fecundity of adult boll weevils. On the other hand, egg viability was significantly reduced by lufenuron, regardless of whether the females were treated premating or postmating or whether their pairs were either treated or untreated. However, egg viability increased as the females aged since the initial exposure date to lufenuron, indicating a potential transovarial effect of this insecticide. Our results indicate that pyriproxyfen and methoxyfenozide do not affect adult boll weevils, whereas lufenuron temporarily reduces the egg viability of this key cotton pest.
机译：Boldishms Grandis Granh的未成熟阶段。 （鞘翅目：Curculionidae），在棉花果实内部进行保护。因此，成年甲虫已成为杀虫剂应用的主要目标。建议使用昆虫生长调节剂（IGRS）免疫，即使它们也可能影响成人昆虫的存活和生殖性状。本研究评估了青少年激素模拟（Pyriproxyfen），Ecdysteroid Agonist（甲氧氧基苯并）和丁蛋白生物合成抑制剂（Lufenuron）对成人纯棉棉铃虫，一种关键的棉花害虫的影响。通过将先前浸入吡咯xyfen，甲氧基苯并和Lufenuron溶液的污染方块和棉叶盘饲喂它们的污染方块和棉叶盘来治疗配合和处女甲虫。接触后，将处理的夫妇笼养到棉花植物上，并评估存活，繁殖力和蛋生存率。 IGRAS既不影响成人铃尺的生存和繁殖力。另一方面，不管女性是否被治疗，或者是否被治疗或未治疗，Lufenuron是由Lufenuron显着降低的卵活力。然而，由于初始接触日期为Lufenuron的女性，鸡蛋活力增加，表明该杀虫剂的潜在跨动效应。我们的结果表明，吡吡咯烷烯和甲氧基苯并不影响成人蒴果，而Lufenuron暂时降低了这种关键的棉花害虫的鸡蛋活力。

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