Vol. 12, Issue 1 (2023)

Author(s):
Asalkar UA, Hasabnis SN and Narute TK

Abstract:
Pseudoperonospora cubensis (Berkeley & Curtis) Rostovtsev pathogen is associated with bitter gourd downy mildew. Due to recurrent outbreaks of downy mildew in bitter gourd over the past decades, it has emerged to be the most destructive disease and created a problem in India. Management of disease by minimizing fungicidal applications is the best way to manage the downy mildew disease in bitter gourd. The research study revealed that alternate use of fungicides significantly inhibited downy mildew disease in bitter gourd during the year, 2022. Seven fungicidal treatments were applied as Absolute control (water spray), Metalaxyl 4% + Mancozeb 64% WP @ 2 g/lit, GI Chitosan @ 1 ml/lit, Potassium salt of active phosphorus @ 4 g/lit, T₂ and T₃ alternatively, T₂ and T₄ alternatively, T_2, T_3, and T₄ alternatively. Overall present research showed that the treatment T₇ (T_2, T_3, and T₄ alternatively) i.e Metalaxyl 4% + Mancozeb 64% WP, GI Chitosan @ 1 ml/lit and Potassium salt of active phosphorus @ 4 g/lit alternatively was observed the most effective against the pathogen Pseudoperonospora cubensis which cause downy mildew in bitter gourd. Treatment T₇ (T_2, T_3, and T₄ alternatively) gave more yield than other treatments.