The invention belongs to the technical field of pesticide, specifically relates to an agricultural germicide containing thiabendazole and 1%-80% of effective ingredients. The thiabendazole which is a triazole germicide developed by Isagro Ricerca, is a sterol demethylation inhibitor, capable of being absorbed by plants rapidly and conducted inside due to its good systematic ability, with good protection and treating activities, for the control of wheat powdery mildew, loose smut, rust disease, stinking smut, glume blight, barley leaf blotch, banded sclerotial, sphacelotheca reiliana, sphacelothecareliana, powdery mildew of melon and fruit, leaf spot of banana, altemaria mali, pear scab and grape powdery mildew.