Powdery mildew is very important foliar disease of cucumber among major cucurbits growing areas of Karnataka which results in huge economic loss. Disease first appear on the leaves thirty days after sowing and continue to produce white mycelial growth on various aerial plant parts up to the harvest. Survey results revealed that the disease severity of powdery mildew in all the cucumber growing areas of northern Karnataka is low to severe ( to %). The disease severity was varied among different stage of the crop and varieties grown but there was no significant difference among the cultivation practices. Maximum mean disease severity was recorded in Dharwad district per cent, whereas minimum disease severity was recorded in Belagavi with per cent. | Survey of powdery mildew in major cucumber growing areas of Northern Karnataka, India
