Question: query regarding management of blight. 
Answer: --please do the ooze test first. if the result positive then spray antibiotic like streptomycin/ streptocycline 1 gram/liter of water or if the result negative then spray redomil gold/ dithane m-45 50 gram/tank or trichoderma viridi 160 gram/tank should be apply 3 times near the root zone and also spray by covering the whole plants.