Ecofriendly Disease Management Early Blight of Tomato caused by Alterneria Solani

Abstract

The early Blight of Tomato caused by Alternaria Solani f.sp lyeopersici. Foliar symptom generally occure on the oldest leves and start as small brownish or block lesion. These leaf spot enlarge upto ½ inch (1.3cm) in diameter in characteristically concentric fashion the area around the spot may become yellow as may entire several affected leaves. The tomato (Lycopersion esculentum) is one fo the most popular crops grow in India. The Alternario blight of tomato caused by Alternaria solar f.sp. lycopersici is more severe and common disease in .The importance of cultural practices is known from ancient time. Suitable adjustment in cultural practice can modify the environmental in such a manner that become unfavorable for the pathogen and disease development. Disease intensity was reducing when shifting in date of transplanting was made for the disease indifferent crop varieties. The tomato crop transplanted in 2nd week of July showed disease intensity (15.5 and 12.80%) and in 4 week to September showed maximum (35.0 and 38.5%) both the years (2014-15 & 2015-16). Using seven different soil amendments under field conditions the minimum disease intensity (12.57 and 12.0%) was observed in application of Neem cake followed by Pyrite id wheat straw was least effective in controlling the disease in both the years of experimentation.