Testing of Seed-borne Fungi of Achyranthes Seed and Disinfection Effect of Seven Fungicides on Seed-borne Fungi

Objective To study the dominant seed_borne fungi of Achyranthes seeds from 3 different producing areas and compare the disinfection effect of several fungicides on seed-borne fungi of Achyranthes seed.Methods Petri-dish testing was used to determine the external and internal seed-borne fungi and the disinfection effect of fungicides.Results The result showed that the amount of spore on the surface of one Achyranthes seed was17.8%～321.9% according to different samples,and the big differences existed.Penicillium spp.and Aspergillus spp.were the two kinds of externally dominant fungi and there was few differences in fungi kind among producing areas but differences in fungi isolation frequency;Penicillium spp.,Rhizopus spp.,Aspergillus spp.and Alternaria spp.were the internally dominant seed-borne fungi,including seed capsule and the internal tissue of seed and their fungi percentage was 19.5%～67.3% and 13.5%～47.5% respectively.There were differences in fungi percentage and dominant seed borne fungi among different producing areas.Conclusion The disinfection effect of seven fungicides are not so good,only Fenaminosulf was up to 50.0%.