Advances in Life Sciences

Brinjal (Solanum Melongena L.) is one of the most common vegetable grown in India and other part of the world. The crop is known to suffer from several diseases. Amongthem, leaf spot caused by Alternaria alternata is an important one. It causes severe damage to the crop particularly in the Saurashtra region of Gujarat. The disease produced small, necrotic, circular brown spots on leaves, with a purplish halo and expands to about 1 cm diameter. The centre becoming grey and cracked, Finally, the spots enlarge in size which later on resulted defoliation of leaves. Biocontrol agents are potential alternative to chemical agents that are hazardous to the environment. Therefore efforts was made to screen the different biocontrol agents against test fungus, Biocontrol agents viz.Trichoderma spp. have worked very well during their bioassays against the leaf spot pathogen and best performance was received with Trichoderma harzianum-I followed by Trichoderma harzianum-II to reduced the radial growth of the leaf spot pathogen in dual culture method.