DISEASE INCIDENCE OF VERTICILLIUM WILT, MACROPHOMINA WILT AND COLLAR ROT OF SUNFLOWER (HELIANTHUS ANNUUS L.) CAUSED BY SCLEROTIUM ROLFSII SACC. FROM TRIPURA
Sunflower (Helianthus annuus L.) is an important oilseed crop in India. It is a recognized worldwide for its beauty, sunflower oil is a valued and healthy vegetable premium oil because of its light colour, high level of unsaturated fatty acids and lack of linolenic acid, bland flavor and high smoke points. Numbers of diseases caused by various fungi, bacteria and viruses, have been identified on wild or cultivated sunflower but only a few of them has economic significance as far as causing yield losses. Sunflower is attacked by many diseases, which reduce the yield and quality significantly under optimal conditions. During Present study, sunflower plants grown at trials allotted by Indian Institute of Oilseed Research, Hyderabad under College of Agriculture, Tripura, Lembucherra, West Tripura in the year 2016-17 and 2017-18 were evaluated for different diseases based on their characteristics symptom and plant pathological view. Results revealed that two types of wilting namely Verticillium wilt caused by Verticillium spp. and Macrophomina wilt caused by Macrophomina phaseolina are occurring along with incidence of collar rot of Sunflower (Helianthus annuus L.) caused by Sclerotium rolfsii Sacc under Agro-Climatic condition of Tripura.
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