Plant-Parasitic Nematodes Associated with Reduced Wheat Yield in Oregon: Heterodera avenae.
Plant-Parasitic Nematodes Associated with Reduced Wheat Yield in Oregon: Heterodera avenae.
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发表时间：
2005-09
影响因子：
1.3
通讯作者：
R. Smiley;Ruth G Whittaker;Jennifer A. Gourlie;S. A. Easley;R. Ingham
中科院分区：
文献类型：
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作者：
R. Smiley;Ruth G Whittaker;Jennifer A. Gourlie;S. A. Easley;R. Ingham
燕麦囊线虫广泛分布在美国西部，其中大多数小麦是在低降雨量地区的非灌溉冬小麦/夏季休耕轮作中种植的。经济和社会压力促使种植者从冬小麦/夏季休耕轮作转向每年免耕春季谷物。一些灌溉田也种植一年生谷物。已经观察到燕麦哈氏菌对西北太平洋地区春小麦产量的影响，但尚未量化。在添加或不添加涕灭威的情况下种植春小麦，以研究中度侵染田地中旱地和灌溉条件下燕麦麦芽孢杆菌与产量之间的关系。春小麦产量与燕麦初始种群呈负相关（P < 0.05）。施用涕灭威可提高春小麦产量达 24%。燕麦 H. avenae 的侵染性幼虫期在春季中期达到高峰密度。灌溉一年生冬小麦的产量也与燕麦初始密度呈负相关。制定控制策略所需的研究重点包括致病型的描述、遗传抗性来源的识别以及旨在管理多种减产害虫的综合实践。
Heterodera avenae is widely distributed in the western United States, where most wheat is grown in non-irrigated winter wheat/summer fallow rotations in low rainfall regions. Economic and social pressures have motivated growers to pursue a transition from winter wheat/summer fallow rotation to no-till annual spring cereals. Annual cereals are also planted in some irrigated fields. The impact of H. avenae on spring wheat yield in the Pacific Northwest had been observed but not quantified. Spring wheat was planted with or without aldicarb to examine relationships between H. avenae and yield under dryland and irrigated conditions in moderately infested fields. Spring wheat yields were negatively correlated (P < 0.05) with initial populations of H. avenae. Aldicarb application improved spring wheat yield as much as 24%. The infective juvenile stage of H. avenae reached a peak density during mid-spring. Yield of irrigated annual winter wheat was also negatively correlated with initial density of H. avenae. Research priorities necessary to develop control strategies include a description of the pathotype, identification of sources for genetic resistance, and integrated practices designed to manage multiple yield-reducing pests.