Effect of abiotic factors on incidence of leaf folder, Cnaphalocrocis medinalis guenee in rice ecosystem of Konkan region

Abstract

The present experiment was conducted during Kharif season 2018-19 and 2019-2020 at Agronomy farm, Department of Agronomy, College of Agriculture, Dapoli to study the correlation between leaf folder incidence and weather parameters. Results revealed that morning relative humidity in S1V2 (r=0.576), S1V4 (r=0.625), S1V5 (r=0.617), S1V7 (r=0.618), S1V9 (r=0.617), S2V1 (r=0.583), S2V3 (r=0.672), S2V5 (r=0.583), S2V9 (r=0.630), S3V2 (r=0.630), S3V5 (r=0.578), S3V9 (r=0.622), evening relative humidity in S2V1 (r=0.611) and rainfall in S2V1 (r=0.642) was found to be positively significant. While, maximum temperature in S1V5 (r=-0.599), S2V1 (r=-0.697), S2V5 (r=-0.634), S2V9 (r=-0.614), S3V1(r=-0.614), S3V2 (r=-0.629), S3V5 (r=-0.599), S3V8 (r=-0.622), S3V9 (r=-0.647) and bright sunshine hours S2V1 (r=-0.714), S3V8 (r=-0.604) was found to be negatively significant. Remaining all of the weather parameters were found to be non-significant.