questions: asking for the preventive measure against late blight in potato. 
 answers: suggested to spray ridomil mz-72 solution @ 2 gram in 1 litre of water and indofil m-45 solution @ 2.5 gram in 1 litre of water alternatively at the following stages: 1) 1st spary at 1 month, 2) 2nd spray at 2 month stage and 3) 3rd spary at 3 month stage.