Randolph Terri L, Peairs Frank B, Kroening Mary K, Armstrong John S, Hammon Robert W, Walker Cynthia B, Quick James S
Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO 80523, USA.
J Econ Entomol. 2003 Apr;96(2):352-60. doi: 10.1093/jee/96.2.352.
Plant damage and yield response to the Russian wheat aphid, Diuraphis noxia (Mordvilko), were evaluated on a susceptible (TAM 107) and a resistant (RWA E1) winter wheat, Triticum aestivum L., in three Colorado locations in the 1993 and 1994 crop years. Russian wheat aphid was more abundant on TAM 107 than on RWA E1. Russian wheat aphid days per tiller were greater at the higher infestation levels. Yield losses as a result of Russian wheat aphid infestation occurred most of the time with TAM 107 but rarely with RWA E1. Seed densities were reduced at higher infestation levels in TAM 107 at two locations. Russian wheat aphids per tiller had a negative relationship to yield in TAM 107 but not in RWA E1. In TAM 107 yield decreased as aphid densities increased, but yield remained constant regardless of initial aphid abundance on RWA E1 in all environments. Seed densities were reduced at higher infestation levels in TAM 107 at two locations. The resistance conferred by the Dn4 gene seems to be an effective management approach across a range of field conditions.
1993年和1994年作物生长季，在科罗拉多州的三个地点，对一个感虫冬小麦品种（TAM 107）和一个抗虫冬小麦品种（RWA E1）进行了小麦对俄罗斯小麦蚜（Diuraphis noxia (Mordvilko)）的受害情况及产量反应评估。俄罗斯小麦蚜在TAM 107上的数量比在RWA E1上更多。在较高的虫口密度下，每个分蘖上俄罗斯小麦蚜的天数更多。俄罗斯小麦蚜侵染导致的产量损失在TAM 107上大多时候都会发生，而在RWA E1上则很少发生。在两个地点，TAM 107在较高虫口密度下种子密度降低。TAM 107中每个分蘖上的俄罗斯小麦蚜数量与产量呈负相关，而在RWA E1中则不然。在TAM 107中，随着蚜虫密度增加产量下降，但在所有环境下，RWA E1的产量无论初始蚜虫数量如何都保持恒定。在两个地点，TAM 107在较高虫口密度下种子密度降低。由Dn4基因赋予的抗性似乎是在一系列田间条件下的一种有效管理方法。
