Vol. 11, Issue 11 (2022)

Author(s):
Ashish Kumar Pandey, Satish Sharma and Devesh K Pandey

Abstract:
Oilseed brassicas, sometimes referred to as rapeseed-mustard, are a significant class of oilseed crops worldwide. These crops are vulnerable to a variety of biotic and mesobiotic pathogen-caused illnesses. The most damaging disease to affect oilseed brassica species on all continents is Alternaria leaf blight, commonly known as Alternaria dark spot. It is recognised that the fungi Alternaria brassicae, Alternaria brassicicola, and Alternaria raphani, either alone or in combination, can cause this disease. Necrotrophic diseases such as Alternaria leaf spot cause lesions on leaves, stems, and siliquae that are surrounded by chlorotic regions. These symptoms include a reduction in the area used for photosynthesis, defoliation, and the early onset of senescence. The amount and quality of harvested brassica products are significantly reduced as a result of Alternaria blight. Indian mustard is the popular name for Brassica juncea (L.) Czern. & Coss., which is used all over the world as an oilseed, vegetable, and condiment. The infection that causes the most damage to oilseeds is Alternaria brassicae. Five plant extracts and five fungicides were applied in the current experiment under in vitro settings using the poison food method (PFT) and Standard Blotter Test (SBT), as well as under in vivo conditions using seed application, foliar application, and seed + foliar application. The results of the current study showed that captan + hexaconazole and mancozeb + carbrendazim were the two fungicides that were most successful in boosting seed germination and vigour index by lowering pre- and post- emergence mortality against Alternaria brassicae.