A Fusarium solani f.sp. glycines isolate collected in Cruz Alta RS, Brazil, was utilized in these experiments to evaluate the possibility of the Sudden Death Syndrome (SDS) pathogen being transmitted by soybean (Glycine max) seeds. The seedborne nature of SDS pathogen was demonstrated using infected sorghum (Sorghum bicolor) seeds, infested soil, and infected plant debris as transport vehicles of inoculum. The following evidence of soybean seeds being the primary inoculum of SDS pathogen was chlamidospores were externally adhered to the soybean seeds after six months; soybean seeds had with the fungus mycelium after 12 months of storage; 75 c.f.u./ml were removed from the seed coat after 12 months of storage; and the fungus was transmissible after 12 months of storage.
Glycine max; seed; fungus; dissemination
