Question: query regarding managenemt of fruit rot in jack fruit. 
Answer: apply trichoderma viridi 1o gram/liter of water near the root zone by loosenig the soil with the help of hand hoe or khurpi. and then also spray the same medicin 3 times at 5 days interval in the evening time in the absence of rain by covering the whole plants.after that spray borax 6 gram/liter of water 3 times @ 7-10  days interval in the evening time.