90percent of bittergourd fruits are becoming like this and falling off. Heavy loss ,plz find a solution
Spray with amistar 1 mL/L + Alika 0.4 mL/L spray
https://www.bighaat.com/products/amistar-fungicide + https://www.bighaat.com/products/alika-insecticide
Check for high moisture Check for downy mildew disease