叶面杀虫剂对南达科他州大豆螟虫(鞘翅目:天牛科)防治效果的研究。

Zachary D Loomis, Philip A Rozeboom, Bradley A McManus, Adam J Varenhorst
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引用次数: 0

摘要

Dectes茎螟虫,Dectes texanus LeConte,是一种昆虫,寄生于南达科他州的向日葵(Helianthus annuus L.)和大豆(Glycine max L.)。从历史上看,Dectes茎螟虫一直是大豆的一种小害虫,但自2017年以来,它在该州东南部地区变得越来越普遍。这种昆虫造成的大部分损害发生在幼虫缠绕茎部时,导致倒伏。倒伏造成的额外产量损失超过幼虫隧穿活动造成的10%至15%的损失。如果发现虫害,可以通过早期收获将倒伏造成的损失降至最低。以前的管理建议建议将轮作和耕作作为减少茎螟虫危害的方法。然而,这些文化策略目前并不有效,因为即使实施了这些策略,Dectes茎螟虫的数量也会继续增加。以前的研究已经确定,对Dectes茎螟虫的化学管理要么不有效,要么成本过高。这是由于成年甲虫的羽化期较长,而幼虫被保护在茎内。本研究的目的是确定定时施用杀虫剂是否可以有效地减少Dectes茎螟虫压力并提高大豆产量。本研究评估了几种杀虫剂和三种杀虫剂的施用时间。研究结果表明,日历日期的应用将不足以管理Dectes茎螟虫。然而,当施用与成虫活动同步时,我们观察到侵染大豆的数量显著减少,产量显著提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Efficacy of foliar insecticides for Dectes stem borer (Coleoptera: Cerambycidae) management in South Dakota soybeans.

Dectes stem borer, Dectes texanus LeConte, is an insect that infests sunflowers, Helianthus annuus L., and soybeans, Glycine max L., in South Dakota. Historically Dectes stem borer has been a minor pest of soybean but has become increasingly prevalent in the southeastern area of the state since 2017. Most of the damage caused by this insect occurs when the larvae girdle the stem, leading to lodging. Lodging causes additional yield losses above the 10% to 15% reduction caused by larval tunneling activity. If detected, losses due to lodging can be minimized by early harvest of the infested field. Previous management recommendations proposed crop rotation and tillage as methods to minimize Dectes stem borer damage. However, these cultural strategies are not currently effective as Dectes stem borer populations continue to increase even when they are implemented. Previous research has determined that chemical management of Dectes stem borer is either not effective or cost prohibitive. This is due to the prolonged emergence period of the adult beetle and the larva being sheltered within the stem. The purpose of this research was to determine if timed insecticide applications can be used to effectively reduce Dectes stem borer pressure and improve soybean yields. This study evaluated several insecticides and three insecticide application timings. The results of the study indicate that calendar date applications will not be sufficient for the management of Dectes stem borer. However, when the applications synchronized with adult activity, we observed significantly fewer infested soybeans and improved yield.

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