Antagonistic Potential of Trichoderma spp., Botanicals and Fungicides against Alternaria solani Causing Early Blight of Tomato in-vitro Conditions

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. The major constraints in production of tomato are biotic and abiotic stress. Among the biotic stress Early
blight caused by Alternaria solani inflicts tremendous losses to the crop. The present research was carried out to study in
vitro evaluations of native Trichoderma spp., botanicals and fungicides against Alternaria solani causing Early blight of
tomato which induces losses in Manipur. Food poison technique and Dual culture were aided in this investigation. The
investigated results revealed that among bio control agents tested Mix (Trichoderma asperellum + Trichoderma
harzianum), Trichoderma viride and Trichoderma asperellum effectively controlled mycelial growth of the pathogen by
74.92% and 73% respectively. Botanicals used in this study significantly inhibited the growth of the fungus, among which
garlic (Allium sativum) gave the best results by showing 74.17% of inhibition at 10% concentration followed by garlic 5%
and ginger 10% showed 66.98 to 61.05% inhibition, among fungicides Propiconazole 13.9% + Difenoconazole 13% gave
the best results by showing of 100% inhibition at 0.1% concentrations.