questions: asking about the late blight in potato. 
 answers: suggested to spray ridomil mz-27(64%mancozeb+8%metalaxyl(2gm/lt of water )followed by dithane m 45@2.5gm/lt of water in alternate application (3 sprayers with ridomil mz-27 and 3 with dithane m45(at an interval of 12 days .var. of bhindi-pusa sawani,pravani kranti and arka anamika.