DSS Rice blast play online

Rice (Oryza sativa L.) is the single most important food crop for more than one-third of the world's population. Of the various diseases limiting rice productivity, blast disease caused by Pyricularia grisea Sacc. {Magnaporthe grisea (Hebert) Barr.} continues to be an enigmatic problem in several rice growing ecosystems of both tropical and temperate regions of the world and is a serious constraint in realizing the full yield potential of rice cultivars. It continues to be the most destructive disease of rice despite decades of research towards its control. Weather has a very important role to play in the appearance, multiplication and spread of the blast fungus. Considerable efforts have been directed towards developing blast-resistant cultivars, but due to high variability in blast pathogen, most of the resistant varieties frequently succumb to this disease. Therefore, the most practical way to control blast epidemics have been the use of fungicides. However, due to high cost of chemicals as well as their hazardous effects, use of fungicides is invariably uneconomic.