Abstract：Triazoles is one kind of fungicides that is the most potential application at present. This article through uses the hypha growth speed measuring method: take zhe testing-fungus on zhe potato dextrose agar plate which inclusioning medicament progress train. For about one to five days ,examine each treating fungus’ growth complexion .The average colony diameter measured in two perpendicular directions was used for calculation of colonies expand diameter and bate thalli rate ，then account out and compare with tradimefon, myclobutanil, penconazole, tebuconazole which of zhe four kinds triazoles fungicides and theirs metal-composite that to several important plant causing fungus of disease of the Virulence namely 50% effective concentration . The control effect in pot test was conducted at zhe last. The results show that zhe four kinds triazole fungicides compare with primary medicament opposite average and the control effects are in general enhanced after the formation of the triazole fungicides with metals compared with ligands.
Keywords: Triazole fungicides; Metal complex ； Toxicity；EC50
