Pathogenicity of Fusarium solani f. sp glycines isolates on soybean and green bean plants

Green bean plants were grown in a greenhouse in soil removed from a soybean field in 1996 that had a high incidence of soybean sudden death syndrome ( SDS). Over a period of 4 weeks, isolations were made from taproot tissue of green bean plants to recover Fusarium isolates. Tell isolates of Fusarium solani were recovered and used to inoculate soybean and green bean plants i n the greenhouse. These 10 isolates caused typical SDS symptoms on the soyb ean plants and caused a root and crown rot on green bran plants. The green bean plants did not develop typical symptoms associated with soybean SDS bu t, rather, leaves on infected plants skewed yellowing and necrosis. Molecul ar data indicated that these II) isolates were identical to Fusarium solani f. sp. glycines that cause soybean sudden death syndrome. All isolates wer e re-isolated from greenhouse-inoculated soybean and green bean plants.