茼蒿生长期发生普遍的病害是叶枯病、炭疽病和病毒病,危害最大的是细菌性萎蔫病,现将识别和防治措施介绍如下。细菌性萎蔫病发病初期部分分枝呈灰绿色,中午萎蔫,早晚可恢复,茎易捏扁;后期生长点变色,渐干枯;剖开病茎可见维管束、髓部变褐腐烂,轻者仅下部叶片坏死干枯,严重的全株枯萎。防治措施:该病主要危害菊科蔬菜,重病田应与非菊科作物轮作2年以上;病菌在分苗或定植等农事操作过程中易侵入,定植前菜苗用72%农用硫酸链霉素可溶性粉剂1000倍液浸泡4小时,田间操作时尽量减少 Artemisia ordosica growing season is a common disease is leaf blight, anthrax and virus disease, the most damaging bacterial wilt disease, the identification and prevention measures are described below. Part of the early development of bacterial wilt disease grayish green, wilting at noon, sooner or later resume, easy to pinch flat stem; the late growth point discoloration, gradually dry; open the diseased stem visible vascular bundle, pith brown decay, light only The lower leaves necrosis dry, severe whole plant wilt. Prevention and treatment measures: The disease is mainly endangering asteraceae vegetables, serious disease should be non-Asteraceae crop rotation for more than 2 years; bacteria in the seedling or planting and other agricultural operations easily invaded, planting seedlings with 72% of agricultural streptomycin sulfate Dust 1000 times soak 4 hours, minimize field operation