Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 15, Issue 3, 2013; Page No.(615-619)

STUDIES ON PERCENT INCIDENCE AND SEVERITY INDEX OF ALTERNARIA BLIGHT OF SOYBEAN OF PARBHANI DISTRICT

D.C. KAMTHANE AND R. R. RAKH

Abstract

The soybean (Glycine max), are commonly called as “Cinderella crop” or “King of legumes”. Soybeans are the world’s most important legume crop and China is world’s largest soybean producer. As the cradle of soy foods, China offers an excellent opportunity to experience the long standing oriental soy culture and exchange ideas about soybean research and industry development with the experts from all around the world. The underground as well as the foliar parts get affected by different micro-organisms causing various diseases.Among these,there are bacterial,fungal and viral diseases. A fungal disease Alternaria Blight is caused by Alternaria tennuissima .The Alternaria blight infected leaves show brown necrotic spots with concentric rings which coalesce and form large necrotic area. The lesions get surrounded by yellow zone. Infected leaves later in the season dry out and drop prematurely. The seeds become small and shriveled dark, irregular, spreading sunken areas occur on the seed.This results in yield loss of soybean. Therefore in this, the emphasis is given in relation to studies on percent incidence and reaction of soybean varieties to Alternaria Blight.

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