questions: asking about remedy for gummosis in bottle gourd 
 answers: remove the darkened area of bark from the tree, plus a strip of the healthy bark until the wound is surrounded by a margin of healthy bark. once this is done, let the area dry. keep checking the area and repeat the bark trimming if necessary.
and spray saaf fungicide @ 2gm/litre water,2 sprays at an interval of 5days