Effect of pH & Different Media on Mycelial Growth of Alternaria solani Causing Early Blight of Tomato in Manipur and In-vivo Evaluation of Native Trichoderma spp., One Chemical Fungicide (Mancozeb) on Alternaria solani Causing Early Blight of Tomato

The tomato is the edible, often red berry of the plant Solanum lycopersicum, commonly known as a tomato plant. The species originated in western South America and Central America. The area under tomato cultivation in Manipur accounts for about 0.15 million hectares with an average production of 2.10 million tonnes and productivity of 12.02 tonnes ha-1 during 2016-17. Present research was carried out to study the effect of different culture media and pH on mycelia growth of Alternaria solani. Among seven culture media that were tested, the fungus grew best on Richards agar, OatMeal Agar and Coon's media. The most suitable pH for growth of fungus was 6.0 and 7.0. Native Trichoderma spp. has good effect on controlling early blight of tomato in filed conditions.