questions: query related to ridge gourd 
 answers: suggested planofix @ 1 ml per 4.5 litre of water, spray once in a week in the fruits and flowers
 spray neem oil or pyrethrin against insect, mix 5 ml per litre water and spray 3 to 4 times at 3 days interval
also, spray micronutrient like boron and sulphur to the plants