小麦拟黄叶病(WYLV)是黄淮流域近年小麦上发生的一种新病毒病。经传毒试验结果初步明确症状和传毒介体蚜虫种类。叶片初发病上半部退缘发白;后变为全叶退缘黄化,叶鞘顶端同时略变褐色。以多种介体蚜虫传播。以麦二叉蚜和禾谷缢蚜传毒力最强,麦长管蚜次之,而麦无网蚜和玉米叶蚜仅有时轻微传播。 Wheat yellow leaf disease (WYLV) is a new virus disease in wheat in Huang-Huai River basin in recent years. The test results of the initial clear symptoms and toxic aphid species. The first half of the leaves of the disease began to retreat whitish; after the change into the whole leaves retreat yellow, leaf sheath at the same time slightly brown. Aphids spread with a variety of mediators. Aphis gossypii and wheat Aphis gossypii were the most virulent, followed by wheat aphid, while the wheat aphid and corn aphid were only slightly transmitted.