Diaporthe phaseolorum var. sojae

Diaporthe phaseolorum var. sojae is a plant pathogen infecting soybean and peanut. Diaporthe phaseolorum var. sojae is the perfect form of the causal pathogen of pod and stem blight of soybean. It is a fungal ascomycete that commonly infects seeds, pods, stems, and petioles. This pathogen is also found in its imperfect state, Phomopsis sojae. This is a common disease of most soybean growing regions in the United States. Losses result from losses in field stands, reductions in yield, and poor seed quality. Diaporthe phaseolorum var. sojae can infect any above ground parts of the plant; the disease may be present without showing any symptoms.