Diseases of cotton and their management

摘要

Cotton is one of the important kharif crops of the State, which is attacked by more than 30 diseases among which seedling mortality, bacterial blight, fungal leaf spots, boll rot, leaf curl and fusarium wilt are the main diseases which have caused major losses. Pathogenic seedling mortality: The main symptoms of the disease are pre- and post-emergence damping off seedling caused by number of fungal and bacterial organisms. The seedling mortality is comparatively more when continuous dry conditions and high temperature prevail during May-June. The direct impact of the disease reflects on reduction of plant population in the field. Primarily 1 to 2 weeks old seedlings are more sensitive. The affected seedlings produce necrotic lesions and rot at the soil level and finally are dried up. Sometimes the seeds is unable to germinate and rot under the soil.