Efficacy of Insect Growth Regulators as Grain Protectants against Two Stored-Product Pests in Wheat and Maize
Efficacy of Insect Growth Regulators as Grain Protectants against Two Stored-Product Pests in Wheat and Maize
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DOI：
10.4315/0362-028x.jfp-11-397
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发表时间：
2012-05-01
影响因子：
2
通讯作者：
Tomanovic, Zeljko
中科院分区：
文献类型：
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作者：
Kavallieratos, Nickolas G.;Athanassiou, Christos G.;Tomanovic, Zeljko
昆虫生长调节剂 (IGR)（两种保幼激素类似物 [苯氧威和吡螨酯]，四种几丁质合成抑制剂 [除虫脲、氟虫脲、虱螨脲和杀铃脲]，一种蜕皮类固醇激动剂 [甲氧虫酰肼]，以及一种几丁质合成抑制剂和保幼激素类似物的组合 [虱螨脲加苯氧威]）在实验室中针对昆虫成虫进行了测试。玉米中的 Prostephanus truncatus 和小麦中的 Rhyzopertha dominica 成虫。对于 P. truncatus，测试的 IGR 以三种剂量（1、5 和 10 ppm）应用于玉米，并在三个温度水平（20、25 和 30 摄氏度）下进行评估，而对于 R. dominica，上述剂量仅在 25 摄氏度下对小麦进行评估。除了后代产量之外，还评估了暴露于 IGR 处理的商品 14 天后处理的成虫的死亡率。所有 IGR 在剂量 >= 5 ppm 时对测试物种均非常有效（抑制后代超过 88.5%），而在 25 摄氏度下对截尾青霉（P. truncatus）或虱螨脲（lufenuron）和吡丙醚（pyriproxyfen）在 1 ppm 剂量下施用时，完全抑制（100%）后代生产。在所有测试剂量下，在用虱螨脲加苯氧威处理的小麦中观察到了多米尼加根瘤菌亲本死亡率的最高值。本研究中检查的温度水平似乎并未影响所测试的 IGR 在处理玉米中的成虫死亡率或子代生产抑制方面的总体性能。测试的 IGR 可能被认为是可行的谷物保护剂，因此可以作为储藏产品综合害虫管理的潜在组成部分。
Insect growth regulators (IGRs) (two juvenile hormone analogues [fenoxycarb and pyriproxifen], four chitin synthesis inhibitors [diflubenzuron, flufenoxuron, lufenuron, and triflumuron], one ecdysteroid agonist [methoxyfenozide], and one combination of chitin synthesis inhibitors and juvenile hormone analogues [lufenuron plus fenoxycarb]) were tested in the laboratory against adults of Prostephanus truncatus in maize and against adults of Rhyzopertha dominica in wheat. The tested IGRs were applied in maize at three doses (1, 5, and 10 ppm) and assessed at three temperature levels (20, 25, and 30 degrees C) in the case of P. truncatus, while in the case of R. dominica the above doses were assessed only at 25 degrees C in wheat. In addition to progeny production, mortality of the treated adults after 14 days of exposure in the IGR-treated commodities was assessed. All IGRs were very effective (>88.5% suppression of progeny) against the tested species at doses of >= 5 ppm, while diflubenzuron at 25 degrees C in the case of P. truncatus or lufenuron and pyriproxyfen in the case of R. dominica completely suppressed (100%) progeny production when they were applied at 1 ppm. At all tested doses, the highest values of R. dominica parental mortality were observed in wheat treated with lufenuron plus fenoxycarb. Temperature at the levels examined in the present study did not appear to affect the overall performance in a great extent of the tested IGRs in terms of adult mortality or suppression of progeny production against P. truncatus in treated maize. The tested IGRs may be considered viable grain protectants and therefore as potential components in stored-product integrated pest management.