Survey of alternaria leaf spot of soybean in central vidarbha

The roving survey was conducted during Kharif season 2017–18 in Vidarbha region of Maharashtra in order to know the per cent disease incidence of Alternaria leaf spot of soybean and results revealed that maximum mean per cent disease incidence (41.66%) was observed in Walgoan village of Amravati district followed by in Mozari (40.19%) Tahsil Tiwsa district Amravati. Whereas minimum percent disease incidence (12.50%) was noticed in village Tuljapur Taluka Seloo district Wardha followed by Jambhrun Parande village in Washim district (13.93%). Total 440 bits of infected leaf sample of soybean Alternaria leaf spot subjecting for isolation, the main pathogen isolated was Alternaria alternata (85.92%) followed by Alternaria tenuissima (3.85%). This indicated that Alternaria alternata was the major pathogen species associated with soybean in Vidarbha region.