Vol. 10, Issue 12 (2021)

Author(s):
Umadevi K, Ganesha Naik R, Nandish MS, Sarvajna Salimath B and Ravindra H

Abstract:
Septoria leaf spot of tomato caused by Septoria lycopersici Speg. is an economically important disease in all tomato growing areas of the world. The impact of weather parameters on per cent disease index (PDI) was analyzed during 2020-21 at college of agriculture, KSNUAHS, Shivamogga. The disease appeared at 3^rd MW and had steep progression throughout the cropping period. Maximum and minimum temperature had significant positive correlation with PDI at 1 per cent and 5 per cent level of significance (0.829 & 0.577), respectively. While, minimum relative humidity had significant negative correlation (-0.710) with PDI at 1 per cent level of significance. The regression equation explained that 88.88 per cent variation in the PDI of the disease was due to weather variables. The data collected during the studies can be used for predicting the appearance of septoria leaf spot of tomato well in advance, thereby helping in the adoption of timely management practices.