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首页> 外文期刊>Journal of Economic Entomology >Technique to Assess Effectiveness of Control Tactics Against Ostrinia nubilalis (Lepidoptera: Crambidae) in Whorl-Stage Corn
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Technique to Assess Effectiveness of Control Tactics Against Ostrinia nubilalis (Lepidoptera: Crambidae) in Whorl-Stage Corn

机译：评估玉米轮作中对玉米Ost（鳞翅目：Cra科）控制策略有效性的技术

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Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae) is one of the most damaging insect pests of corn. Studies were conducted to determine whether live larval counts obtained from corn whorls were predictive of the amount of larval tunneling that would result in the stalk of the plant 40 d later at the end of larval development. Whorls from plants treated with Dipel10G (6,400 IU per whorl) and untreated controls, both infested with O. nubilalis neonates, were evaluated for the number of live larvae in 50 whorls 5, 7, 9, and 12 d after Bacillus thuringiensis (Berliner) (Bacillales: Bacillaceae) application. Forty days after larval infestation, 25 plants from each plot were split from tassel to base, and the length of larval tunneling was recorded. There was a strong relationship between numbers of live larvae in the plant whorl and the length of larval tunneling that resulted. While linear at each location, there was significant variation in the relationship among locations, indicating that comparisons could not be made between years or locations within a year. Blocks within a location on a given year did not vary significantly and reproducible results were obtained each year within a given location as well as on any of the whorl pulling dates evaluated. Because of its ease of use, predictability, and rapid return of results, we propose this technique as an additional method to shot-hole feeding and stalk splitting to evaluate the effectiveness of O. nubilalis management strategies.
机译：Ostrinia nubilalis（Hübner）（鳞翅目：Crombidae）是玉米中最具破坏性的害虫之一。进行了研究以确定从玉米轮获得的活幼虫计数是否可预测幼虫开挖的数量，该数量将在幼虫发育结束后40 d导致植株的茎秆。在苏云金芽孢杆菌（Berliner）之后第5、7、9和12 d，用Dipel10G（每轮6,400 IU）处理的植物和未经处理的对照均感染了N. nubilalis新生幼虫，其50轮幼虫中的活幼虫数量得到了评估。 （芽孢杆菌：芽孢杆菌科）应用。幼虫侵染后四十天，将每块地上的25株植物从流苏分裂到基部，并记录幼虫开挖的长度。植株轮中活幼虫的数量与幼虫开挖的时间之间存在很强的关系。虽然在每个位置都是线性的，但是位置之间的关系存在显着差异，这表明无法在年份之间或一年中的位置之间进行比较。给定年份中某个位置上的区块变化不大，并且每年在给定位置以及所评估的任何轮动日期中均获得可重复的结果。由于它的易用性，可预测性和快速的结果返回率，我们提出了将该技术作为一种补充方法来进行小孔进给和秸秆劈裂，以评估O. nubilalis管理策略的有效性。

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