小麦粒线虫病又叫粒瘿线虫病,全国冬、春麦区都有发生,尤以长江下游和华北麦区为重。1病害诊断小麦苗期至成熟期都有症状表现,以在麦穗上形成虫瘿最为明显。发病植株在分蘖期表现为叶鞘松弛,茎秆粗、弯曲,叶片皱缩。孕穗期以后,表现 Wheat grain nematode disease, also known as grain gall nematode disease, the national winter and spring wheat areas have occurred, especially in the lower reaches of the Yangtze River and North China wheat as the most important. 1 disease diagnosis Wheat seedling to mature have symptoms, to form the most obvious worm on the ears. The diseased plants showed leaf sheath relaxation, thick stalk, bending and leaf shrinkage at tillering stage. After booting stage, performance