Survey on black spot of papaya in major papaya growing areas of Southern Karnataka

Abstract

Papaya is affected by several diseases like, foot rot, anthracnose, powdery mildew, black spot, brown spot, papaya ring spot, mosaic and leaf curl diseases. Among them black spot disease caused by Asperisporium caricae is emerging as an important one in limiting papaya prodiction. A random survey was conducted during September to November months of 2018 in Southern Karnataka for the severity of black spot of papaya caused by Asperisporium caricae. Among the different districts surveyed viz., Mandya, Ramanagar, Mysore, Hassan and Chamrajnagar, the per cent disease index (PDI) was ranged from 7.86-38.00 per cent on leaves and 0.00-24.97 per cent on fruits. Highest PDI was recorded in Ramanagar district at Kanakapura taluk on leaves 35 per cent and on fruits 22 per cent. Lowest PDI was recorded in Chamrajnagara district at Yelandur taluk on leaves 7.86 per cent and on fruits 0.71 per cent.