小麦粒线虫病在我省曲阳、张北、康保、沽源、尚义、大城等县发生较重,一般年份发病率10—20%,严重达25%,对小麦产量影响很大。其症状表现:叶片奇形皱缩,棵矮、茎杆肥肿弯曲,甚至不能抽穗。既使能抽穗,穗也变矮、深绿、内外颖片炸开,子粒呈球形、尖硬、初为油绿色,后变黄褐至黑褐色(即粒线虫的虫瘿)。 Wheat germ nematode disease in Quyang County, Zhangbei, Kangbao, Guyuan, Shangyi, Ayutthaya and other counties occurred heavier, the incidence of 10-20% in general years, a serious 25%, a great impact on wheat yield. Symptoms of its performance: leaf-shaped folds shrinkage, short trees, stems hypertrophy bend, or even can not be heading. Even if the heading, the ears also become shorter, dark green, inside and outside the chip explosion, the particles were spherical, sharp hard, early as oily, later yellowish brown to dark brown (ie, nematode worm).