Major Highlights

Rice field was monitored in spring (Chaite), boro/winter (Hiunde) and main/raiy (Barkhe) season during seedling, tillering, flowering and ripening stage during 2016/17. Incidence of various diseases was recorded in the field. The diseased specimens were collected for laboratory investigation. Occurrence of any disease was recorded in various locations. Study revealed that seedling blight caused by Sclerotium rolfsii is the major disease of winter/boro and spring season rice which was observed in Jhapa, Morang and Udaypur. Unlike winter/boro and spring season, blast, bacterial blight and sheath blight were the major diseases in main season rice. Blast was observed in seedling, tillering to flowering stage in some blast susceptible varieties like Masuli, Kanchhi Masuli etc. Moreover, higher incidence of neck blast was observed in those varieties. Brown spot was also observed as major disease from nursery to ripening in the drought prone areas. 28 Bacterial leaf blight was observed in Jhapa, Morang, Sunsari, Udaypur and Saptari. Similarly, sheath blight was observed in Jhapa, Morang, Sunsari and Saptari. Similarly, false smut and sheath rot was also observed in Jhapa and other districts.