questions: asking about vitamin application in bottle gourd 
 answers: suggested to do ooze test for confirmation. dip the infected leaf/ branch in clear water for half an hour. if white particles comes out then it is bacterial infection. then spray strptomycin or crystocyclin 3 times at 7 days interval mixing 1 gram in 5 liters of water. if no white particles comes out then it is fungal infection. for that spray saaf 3 times at 5 days interval mixing 2 gram in 1 liter of water.