Population Comparison of Western Corn Rootworm (Coleoptera: Chrysomelidae) in Regions With and Without a History of Injury to Cry3 Corn

In this study, we examined fields in counties where greater-than-expected injury to Cry3 (Cry3Bb1 or mCry3A) corn roots (&gt;1 node) had previously been reported (problem counties) and counties where injury had not been reported (non-problem counties). Four to eight fields were sampled per county in 2015, 2016, and 2017 to quantify rootworm abundance, root injury, Cry3Bb1 resistance, and rootworm management strategies by farmers (i.e., cultivation of corn, type of corn that was grown, and insecticide use over the previous 6 years). Additionally, a comparison of root injury to Bt and non-Bt corn within fields was made. <br>Files are organized by analysis of interest, and each data file is paired with a text file of accompanying SAS code, which was used for analysis. Analyses include: survival data from bioassays to test for resistance to Cry3Bb1, analysis of corrected survival in bioassays, analysis of proportion third instar larvae in bioassays, analysis of field history variables, analysis of root injury and adult rootworm abundance in fields, and an analysis comparing root injury to Bt and non-Bt corn.Data was collected between 2015 and 2018.<br>An associated publication is in press in <i>Journal of Economic Entomology</i>: "Comparing Populations of Western Corn Rootworm (Coleoptera: Chrysomelidae) in Regions With and Without a History of Injury to Cry3 Corn"<br>

本研究针对此前报道过对Cry3（Cry3Bb1或mCry3A）玉米根系造成超出预期虫害（单株根系损伤节位超过1个）的县（即问题县），以及未发生该类虫害的县（非问题县）的田块展开调查。2015、2016及2017年，每个县采样4至8块田块，以量化西方玉米根萤叶甲（Western Corn Rootworm）的种群丰度、根系虫害程度、Cry3Bb1抗性水平，以及农户采用的根萤叶甲防控策略，具体包括玉米种植模式、种植的玉米品种类型，以及过去6年的杀虫剂使用情况。此外，本研究还对田块内Bt玉米与非Bt玉米的根系虫害情况进行了对比分析。
本数据集按分析需求分类组织，每个数据文件均配有用于执行对应分析的SAS代码配套文本文件。所涵盖的分析内容包括：用于检测Cry3Bb1抗性的生物测定存活数据分析、生物测定校正存活率分析、生物测定中三龄幼虫占比分析、田块历史变量分析、田块根系虫害与成虫根萤叶甲丰度分析，以及对比Bt玉米与非Bt玉米根系虫害程度的分析。本研究的数据采集周期为2015年至2018年。
本数据集关联的一篇论文已被《经济昆虫学杂志》（*Journal of Economic Entomology*）接收待刊，论文标题为《对比有/无Cry3玉米虫害历史区域的西方玉米根萤叶甲（鞘翅目（Coleoptera）：叶甲科（Chrysomelidae））种群》（原英文标题："Comparing Populations of Western Corn Rootworm (Coleoptera: Chrysomelidae) in Regions With and Without a History of Injury to Cry3 Corn"）。