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Common Leaf Spot

Ramularia grevilleana

4 host plants

Last updated

Data Coverage 3 of 6 dimensions
Causal Agent
Host Plants
Symptoms
Management
GDD Threshold
Regional Notes

Common leaf spot creates brown spots on foliage with concentric rings and light-colored centers. You see spotting develop in wet spring weather. The fungus spreads via water splash and wind. Manage through removing infected leaves, improving air circulation, and fungicide use.

Removing foliage after harvest reduces inoculum in the field. Mow leaves of June-bearing plants 0.5 inch above the crown after harvest.

Quick Reference

Causal Agent
Ramularia grevilleana
Host Plants
4

Management

Vulnerability Window

Infection occur in moist weather and are most severe in spring and fall.

Cultural Controls

  • Removing foliage after harvest reduces inoculum in the field.
  • Mow leaves of June-bearing plants 0.5 inch above the crown after harvest.
  • Do not mow everbearing or day-neutral types.
  • Leaf spot can still be a problem after renovation unless supplemented with chemical protection.
  • Use drip irrigation if possible.
  • When using overhead irrigation, shorten sets and water at times that promote rapid drying of the foliage.

Host Plants (4)