Testing of Seed-borne Fungi in Vitex trifolia L.var.simplicifolia Cham Seed and Disinfection Effect of Seven Fungicides on Seed-borne Fungi

To study the dominant seed-borne fungi in seeds from 13 different producing areas and compare the disinfection effect of several fungicides on seed-borne fungi in V.trifolia L.var.simplicifolia Cham.seed.Petri-dish testing was used to determine the external and internal seed-borne fungi and the disinfection effect of 7 fungicides with method of seed dressing and seed soaking.The results showed that Penicillium spp,Rhizopus spp,Aspergillus spp,Mucor spp,Alternaria spp,Fusarium spp were main seed-borne pathogens on the surface.Rhizopus spp,Aspergillus spp,Fusarium spp represented main seed-borne pathogens in-side.The fungi on the surface of seed expressed significantly difference among experimental varieties,but seed-borne fungi inside showed no difference.Carbendazim,carbendazim·Fernasan,th-iophanate-methyl,oxadixyl mancozeb provided better controls for seed-borne fungi than metalaxy·chlorothalonil,chlorothalonil,Fernasan.But the oxadixyl ·mancozeb was the best of all.Aspergillus spp,Fusarium spp were main seed-borne pathogens on the seed.The disinfection effect of oxadixyl·mancozeb was more than 96.7%.