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

Abstract

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.