Bean Binoculars Incident

Phyllosticta Leaf Spot

Issue: Pathogen

Scouted in Polk County, IA on August 3rd, 2024

Phyllosticta Leaf Spot

Details:

Phyllosticta Leaf Spot was scouted in soybeans at the R2 (full flower) growth stage. The fungus likely survives in infested crop residue and can be seed transmitted.

Conclusion:

Cool, moist conditions favor disease development.

Crop rotation and tillage will reduce survival of the fungus.

Resources:

Phyllosticta Leaf Spot | CPN

Close up photo of a soybean leaf with circular lesions.