Mariya Ansari¹, Amarendra Kumar¹*, Thanuja Ambily Sasi², Uday Kumar², Hari Om¹ and Brajendra³

¹Department of Plant Pathology, Bihar Agricultural University, Sabour, India
²Department of Agronomy, Bihar Agricultural University, Sabour, India
³Indian Institute of Rice Research, Hyderabad, India

*Corresponding Author: Amarendra Kumar, Department of Plant Pathology, Bihar Agricultural University, Sabour, India.

Received: July 21, 2025; Published: August 13, 2025

Abstract

Alternaria blight disease of mustard caused by Alternaria brassicae (Berk.) Sacc., is an economically destructive disease of mustard. In the present investigation, a field experiment was conducted to know the effect of date of sowing and weather parameters on alternaria blight disease severity progression. The twenty eight genotypes of mustard were sown on three different dates i.e., 22nd October (Early), 13th November (Mid) and 3rd December (Late). A progressive increase in Alternaria blight disease severity, apparent infection rate and area under disease progress curve (AUDPC) were observed on both leaves and siliqua in almost all the genotypes irrespective of sowing conditions. Maximum infection was recorded in 3rd December followed by 13th November and least infection was recorded in 22nd October planting. Maximum yield was recorded in genotypes sown on 22nd October whereas minimum yield was recorded in 3rd December sowing. A correlation was also established between disease severity and weather parameter to comprehend the influence of weather parameters on disease development. The correlation analysis exhibited a positive correlation between disease severity with maximum and minimum temperature and negative correlation with maximum and minimum relative humidity for mid and late sown conditions while negative correlation with maximum temperature, positive correlation with minimum temperature as well as maximum and minimum relative humidity. The early sown mustard crops could escape severe infection of alternaria blight disease due to susceptible stage of host surpass before the alternaria blight epidemic and increase the yield of the mustard.

Keywords: Mustard; Alternaria Blight; Weather Parameters; Disease Progression; Sowing Environment

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Citation

Citation: Amarendra Kumar., et al. “Impact of Sowing Environment and Weather Parameters on Progression of Alternaria Blight Disease of Mustard". Acta Scientific Agriculture 9.9 (2025): 02-11.

Copyright

Copyright: © 2025 Amarendra Kumar., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.