Vol. 12, Issue 12 (2023)

Author(s):
Veeresh, Amaresh YS, Aswathanarayana DS, Gowdar SB and Nidagundi JM

Abstract:
Cotton is one of the most important commercial crops as it directs the destiny of large part of the farming community as well as that of the flourishing textile industry and is called by various names such as king of fibres, natural fibre, white gold, etc., it plays a vital role in the economy of India. Blight of cotton infected by Alternaria macrospora cause huge losses in the economic yield. Therefore, a study was conducted on influence of weather variables (temperature, relative humidity, rainfall and rainy days) on cotton Alternaria blight disease intensity at Main Agriculture Research Station (MARS), Raichur during 2022-23. The outcomes revealed that, for disease development positive correlation was found in between rainfall and rainy days, morning relative humidity and evening relative humidity with minimum temperature, between rainfall and rainy days, likewise, morning relative humidity and evening relative humidity on disease development. Interaction between sunshine hours with minimum temperature, rainy days, morning relative humidity and evening relative humidity have a significant negative correlation for disease development.