Journal of Plant Disease Sciences

Potato is one of the chiefly well-known vegetables in India. The demand for potato is rising because potato is nutritious and whole some food rich in carbohydrate and contains little fat. Early blight is caused by two species of genus Alternaria solani and Alternaria alternata worldwide on potato crops. Incidence of early blight has been observed in extensive form in potato growing areas of Kota district. Chemicals are commonly applied for controlling early blight disease but very little work has been done on management of the disease by using bio-agents. Among the bio-agents, results revealed that as tuber treatment by spray method with Trichoderma viride @ 8 g/lit per 20 kg combine with two foliar sprays of T viride @ 5 ml/lit of water was found effective against early blight disease with better yield of potato followed by Pseudomonas fluorescens @ 8 ml/lit per 20 kg of tuber combine with two foliar spray of P fluorescens @ 5 ml/lit of water as compared to control.