International Institute of Tropical Agriculture, P.O. Box 34441, Dar es Salaam, Tanzania.
Department of Entomology, University of Nebraska-Lincoln.
Plant Dis. 2018 Mar;102(3):645-650. doi: 10.1094/PDIS-08-17-1227-RE. Epub 2018 Jan 23.
Wheat streak mosaic virus (WSMV), transmitted by the wheat curl mite Aceria tosichella, frequently causes significant yield loss in winter wheat throughout the Great Plains of the United States. A field study was conducted in the 2013-14 and 2014-15 growing seasons to compare the impact of timing of WSMV inoculation (early fall, late fall, or early spring) and method of inoculation (mite or mechanical) on susceptibility of winter wheat cultivars Mace (resistant) and Overland (susceptible). Relative chlorophyll content, WSMV incidence, and yield components were determined. The greatest WSMV infection occurred for Overland, with the early fall inoculations resulting in the highest WSMV infection rate (up to 97%) and the greatest yield reductions relative to the control (up to 94%). In contrast, inoculation of Mace resulted in low WSMV incidence (1 to 28.3%). The findings from this study indicate that both method of inoculation and wheat cultivar influenced severity of wheat streak mosaic; however, timing of inoculation also had a dramatic influence on disease. In addition, mite inoculation provided much more consistent infection rates and is considered a more realistic method of inoculation to measure disease impact on wheat cultivars.
小麦线条花叶病毒（WSMV）由麦卷叶螨 Aceria tosichella 传播，经常导致美国大平原地区冬小麦的产量严重损失。在 2013-14 和 2014-15 生长季节进行了一项田间研究，比较了 WSMV 接种（初秋、晚秋或早春）和接种方法（螨虫或机械）对冬小麦品种 Mace（抗性）和 Overland（敏感性）易感性的影响。测定相对叶绿素含量、WSMV 发病率和产量构成。Overland 的 WSMV 感染最严重，初秋接种导致最高的 WSMV 感染率（高达 97%）和相对于对照的最大产量降低（高达 94%）。相比之下，Mace 的接种导致低 WSMV 发病率（1 至 28.3%）。这项研究的结果表明，接种方法和小麦品种都影响小麦线条花叶的严重程度；然而，接种时间也对疾病有显著影响。此外，螨虫接种提供了更一致的感染率，被认为是测量螨虫对小麦品种疾病影响的更现实的接种方法。
