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油菜白锈病,群众又叫“龙头病”。这种病害,在我省油菜产区都有发生。近年来,甘兰型油菜良种“云油七号”也普遍发现,影响产量。白锈病除油菜外,萝卜、白菜、芥菜、野生荠菜等都可侵染。症状病害在叶、茎、花轴及花上都可发生。受害病叶首先出现淡绿色小斑点,后变黄色,逐渐突起变成白色蜡滴状大小不一的病斑,破裂及散出白色粉末,这就是病菌的孢子囊,严重时,病斑密布全叶,造成黄叶枯死;茎与花轴受害也产生同样病斑,但多形成长圆形和短条状,病茎弯曲扭转,花轴肿大卷曲如龙头状;花辫受害膨大肥厚变绿成叶状结构,不能结实。
White rust rape, the masses also known as “leading disease.” This disease, rape in our province have occurred. In recent years, kulan-type rapeseed “cloud oil on the 7th” is also generally found to affect the yield. In addition to white rape rust, radish, cabbage, mustard, wild shepherd’s purse, etc. can be infected. Symptoms Diseases can occur on leaves, stems, flowers and flowers. Diseased leaves appear first light green small spots, then turn yellow, and gradually turn into white wax drops of varying sizes of lesion, rupture and scattered white powder, which is the germ spores sac, severe, dense lesions Leaves, resulting in dead yellow leaves; stems and flower axis lesions also produce the same lesion, but more than the formation of oblong and short strip, the stem bending twist, flower axis enlargement curly, such as the faucet; pigtail damage enlargement hypertrophy green Into the leaf-like structure, can not be strong.