Division of Plant Sciences, Delta Research Center, University of Missouri, PO Box 160, Portageville, MO 63873, USA.
J Insect Sci. 2010;10:178. doi: 10.1673/031.010.14138.
The long-horned beetle, Dectes texanus LeConte (Coleoptera: Cerambycidae), is a stem-boring pest of soybeans, Glycine max (L.) Merrill (Fabales: Fabaceae). Soybean stems and stubble were collected from 131 counties in Arkansas, Mississippi, Missouri, and Tennessee and dissected to determine D. texanus infestation rates. All states sampled had D. texanus present in soybeans. Data from Tennessee and Arkansas showed sample infestations of D. texanus averaging nearly 40%. Samples from Missouri revealed higher infestation in the twelve southeastern counties compared to the rest of the state. Data from Mississippi suggested that D. texanus is not as problematic there as in Arkansas, Missouri, and Tennessee. Infestation rates from individual fields varied greatly (0-100%) within states. In Tennessee, second crop soybeans (i.e. soybeans planted following winter wheat) had lower infestations than full season soybeans. A map of pest distribution is presented that documents the extent of the problem, provides a baseline from which changes can be measured, contributes data for emergency registration of pesticides for specific geographic regions, and provides useful information for extension personnel, crop scouts, and growers.
长角天牛，Dectes texanus LeConte（鞘翅目：天牛科），是大豆 Glycine max（Fabales：豆科）的茎蛀虫害虫。从阿肯色州、密西西比州、密苏里州和田纳西州的 131 个县采集了大豆茎和茬，并进行解剖以确定 D. texanus 的感染率。所有抽样的州都有 D. texanus 存在于大豆中。来自田纳西州和阿肯色州的数据显示，D. texanus 的样本感染率平均接近 40%。来自密苏里州的样本显示，与该州其他地区相比，东南部的 12 个县的感染率更高。来自密西西比州的数据表明，那里的 D. texanus 问题不像阿肯色州、密苏里州和田纳西州那么严重。个别田地的感染率在各州内差异很大（0-100%）。在田纳西州，第二季大豆（即冬小麦后种植的大豆）的感染率低于全季大豆。本文提供了害虫分布地图，记录了问题的严重程度，为可以衡量的变化提供了基线，为特定地理区域的农药紧急登记提供了数据，并为推广人员、作物侦察员和种植者提供了有用的信息。
