Sheath blight is a soilborne disease caused by the fungus Rhizoctonia solani .
Circular to oval shaped water-soaked spots which are greenish gray and as disease progresses the gray spot turns to white, surrounded by dark brown outlines. Infection of sheath blight fungus may be partial or little effect on grain filling and the infection may also cause the premature death of the plants many times.
Magnaporthe oryzae (Previously: Pyricularia oryzae)
Water -soaked lesion like spots with gray-green and with a darker green border and they expand rapidly to several centimeters in length. The lesions can infect panicle branches, spikes, spikelets and cause necrotic borders in the infected leaves.
Control for the Paddy sheath blight and paddy blast may be done by using the chemicals
Amistar top 0.5 mL/L OR Custodia 1 mL/L OR Nativo 0.5 gm/L or Merger 2 gm/L