questions: asking for the preventive measure against late blight in potato crop cultivation. 
 answers: advised to go for spraying  of  indofil m-45 solution @ 2.5 gram in 1 litre of water alternatively with ridomil mz-72 solution @ 2 gram in 1 litre of water for 3 times at an interval of 30 days. also suggested that the first spraying should be done at the age of 30 days.