← Diseases

Fruit Rot, Phytophthora

Phytophthora cactorum

12 host plants

Last updated

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

Your apple develops firm, tan-colored rot where overhead irrigation wets the fruit, typically on lower branches. Phytophthora cactorum from irrigation water causes this soilborne fruit rot. Prevent by using low-angle drip systems or microsprinklers that don't wet fruit. Susceptibility peaks ten days before harvest, so timing matters.

Use low-angle or microsprinkler heads, placed under trees, so water does not wet fruit. Drip irrigation can also be used.

Quick Reference

Causal Agent
Phytophthora cactorum
Host Plants
12

Management

Cultural Controls

  • Use low-angle or microsprinkler heads, placed under trees, so water does not wet fruit.
  • Drip irrigation can also be used.
  • Reduce the length of irrigation sets.

Host Plants (12)