今年,有许多群众讯问小麦死因。从标本外观看,有病小麦株高为普通小麦株高的50%～60%,茎秆细弱,叶片细、瘦小、枯黄、干枯,有些叶片色泽发暗。麦穗小而短,仅为正常麦穗的1/2左右;小穗发育不良,排行少,籽粒不饱满,干秕,穗粒数明显减少。根系不发达,根的数量少,许多根短粗,畸形,? This year, many people questioned the cause of the death of wheat. From the appearance of the specimen, the diseased wheat plant height is 50% -60% of the plant height of common wheat. The stems are thin, the leaves are thin, thin, yellow and dry, and some leaves are dark in color. Wheat short and small, only about 1/2 of the normal ears; spikelet dysplasia, ranking less, the grain is not full, dried goblet, grain number was significantly reduced. Roots underdeveloped, the number of roots less, many roots stubborn, deformity,?