Vol. 12, Issue 5 (2023)

Author(s):
Himani Jeena, KP Singh, Kumari Surbhi and Gaurav Rakhonde

Abstract:
The current investigation was conducted on the soybean crop against rhizoctonia aerial blight during the Kharif seasons of 2021 and 2022 at the soybean pathology block of the Crop Research Centre, GBPUA&T, Pantnagar, Uttarakhand. The data from the two crop seasons showed that the most favourable time for the development of RAB in soybeans is between the months of September and October. During both years of the experiment, the minimum atmospheric temperatures and relative humidity of evening were highly significant and inversely connected with the onset of disease. While maximum temperature, the number of rainy days and evaporation showed a non-significant and negative correspond with disease index. The morning relative humidity, wind speed, and rainfall showed a significant and positive correlation with disease index. Sunshine hour showed a weak and favourable connection with the disease index. According to the R² values, the correlation between meteorological characteristics and disease severity in 2021 was between 85 and 87 percent, while in 2022 it was between 81 and 90 percent.