Secondary symptoms - Black to brown spotting with concentric rings on leaves are observed. The concentric rings are in a bull's eye pattern and is seen in the center of the diseased area.
Solutions for this issue
Bayer Antracol (Propineb 70% WP) 100 g
Indofil M-45 (Mancozeb 75% WP) 250 g
AgroStar Mandoz (Mancozeb 63% + Carbendazim 12% WP) 100 g