Correlation of Different Weather Parameters with Blumeriella Leaf Spot Disease Development and Disease Intensity in Kashmir Valley

摘要

Cherry an important temperate fruit found to face a serious threat due to Blumeriella leaf spot disease caused by Cylindrosporiumpadi. Development of disease mostly depends on certain weather parameters like temperatures; average maximum and minimum relative humidity and average rainfall. In the present study, the disease appeared during the first fortnight of June when the average atmospheric temperatures both maximum and minimum were 27.30°C and 8.88"C, respectively, with average relative humidityboth maximum and minimum 71.21 and 49.21 % and reached the maximum rate during the second fortnight of June which coincided with the favorable temperature, rainfall and relative humidity for its progress. The percent disease intensity on leaves showed positive correlation with average maximum relative humidity and average rainfall. Thus both high humidity,optimum temperature and rains significantly favored the development of Blumeriella leaf spot disease in Kashmir valley.