Four fungicides of 25.72% Thiram WP,58% Metalaxyl·Mancozeb,18.7% Cabrio-team,60% Pyraclostrobin-Metiram were used to tested field efficacy trials on late blight of potato. The results showed that 18.7% Cabrio-team 1 125 g/hm2 had the best effect of controlling late blight of potato,spraying twice could reach 100% of control effect,and the yield was increased by 159.11%. The remaining three kinds of fungicides on late blight of potato control effect were better,they could be used interchangeably in productio...