Bloomingdale Chris, Irizarry Melissa D, Groves Russell L, Mueller Daren S, Smith Damon L
Department of Entomology, University of Wisconsin-Madison, Madison, WI, USA.
Department of Plant Pathology, Iowa State University, Ames, IA, USA.
J Econ Entomol. 2017 Feb 1;110(1):133-141. doi: 10.1093/jee/tow242.
With the discovery of Neohydatothrips variabilis (Beach) as a vector of Soybean vein necrosis virus (Family Bunyaviridae Genus Tospovirus), a relatively new pathogen of soybean, a multiyear study was initiated in Wisconsin (2013 and 2014) and Iowa (2014 and 2015) to determine the phenology and species composition of thrips in soybean fields. Yellow sticky card traps were used to sample thrips at regular intervals in five counties within each state's primary soybean-growing region. The assemblage of species present in Wisconsin was determined in all site-years, revealing that N. variabilis and other known vectors of tospoviruses were a relatively small percentage of the total thrips captures in 2013 (1.6%) and 2014 (3.6%). A repeated measures analysis was conducted on cumulative proportion thrips capture data within each state's sampling year to investigate differences in phenology, and standardized cumulative insect days were analyzed between sampling years within each state to determine differences in the relative magnitude of populations. Distinct seasonal trends were not detected based on location, as originally hypothesized, and thrips populations varied significantly among locations and between years. These results suggest that thrips populations may be overwintering in northern climates instead of relying solely on migrations to colonize northern soybean fields.
随着新发现可变新蓟马（Neohydatothrips variabilis (Beach)）是大豆脉坏死病毒（属于布尼亚病毒科番茄斑萎病毒属，一种相对较新的大豆病原体）的传播媒介，在威斯康星州（2013年和2014年）和爱荷华州（2014年和2015年）开展了一项多年研究，以确定大豆田蓟马的物候和物种组成。在每个州主要大豆种植区的五个县，使用黄色粘虫板定期对蓟马进行采样。在所有地点年份都确定了威斯康星州存在的物种组合，结果显示可变新蓟马和其他已知的番茄斑萎病毒传播媒介在2013年（1.6%）和2014年（3.6%）的蓟马捕获总数中占比相对较小。对每个州采样年内蓟马捕获数据的累积比例进行重复测量分析，以研究物候差异，并分析每个州采样年之间的标准化累积昆虫日，以确定种群相对数量的差异。未如最初假设的那样基于地点检测到明显的季节性趋势，蓟马种群在不同地点和年份之间差异显著。这些结果表明，蓟马种群可能在北方气候中越冬，而不是仅依靠迁徙来在北方大豆田定殖。
