Vol. 12, Issue 7 (2023)

Author(s):
Dewprakash Patel, Dr. N Lakpale, Dr. AS Kotasthane, Dr. Praveen Sharma and Dr. Deepti Jha

Abstract:
Brown leaf spot disease of potato caused by Alternaria alternata has been known as one of the destructive and common dis­eases of potato and can occur over a wide range of climatic conditions. The field experiment was carried out to study the effect of various weather factors such as maximum and minimum temperature, relative humidity, wind velocity and sun shine on brown leaf spot disease development and progression on potato during Rabi, 2018-19. Results indicated the progression of the disease was varied from 1.68% during 5-11^th January, 2019 (1^st SMW) to maximum progression 18.18% during 9-15^th February, 2019 (6^th SMW), appeared the most favorable time for faster disease development. Results of present study found that disease severity were significantly positive correlated with minimum temperature and sunshine (hours), while non-significantly correlated with maximum temperature and wind velocity and only relative humidity had negative correlation with brown leaf spot disease severity.