A COMPARATIVE-STUDY OF DIAPORTHE PHOMOPSIS FUNGI ON SOYBEAN FROM 2 DIFFERENT REGIONS OF THE WORLD/

A comparative study was conducted with soybean material presenting sym ptoms of the Diaporthe/Phomopsis complex that was collected in two dis tant geographical regions of the world: Beltsville, MA, USA, and Vojvo dina, Yugoslavia. Contrasting with earlier findings, great variability in the disease symptoms was observed, and one or more Phomopsis speci es could be isolated from lesions presenting similar characteristics. Among the thirty-three isolates obtained from the lesions the followin g species were identified: D. phaseolorum var. caulivora, P. phaseoli (teleomorph D. phaseolorum var. sojae, rare), P. longicolla (found for the first time on the soybean fields of Yugoslavia), Phomopsis sp., a nd one culture showing intermediate characters of D. phaseolorum var. caulivora and D. phaseolorum var. sojae. Much diversity was also found in the cultural characters of the the isolates from both localities, presumably indicating evolutionary and adaptation processes.