Blast is a major disease of rice caused by Pyricularia grisea that still remains as the most serious disease causing severe yield loss in tropics and subtropics (Ou, 1980). Swarna variety of rice is being grown by majority of the farmers in the statebecause of its palatability and market value but it showed high susceptibility to the diseases. Fungicidal management of blast is the viable option as the disease develops fast under favorable conditions. In India, several fungicides and spray scheduleswere recommended by several workers (Dubey and Mishra, 1992 and Venkata Rao and Muralidharan, 1983). Hence, thepresent survey was carried out to compare different ecological situations against major diseases and field efficacy of fungicides was evaluated against blast disease of rice for its management.
展开▼
