Neck Rot (Gray Mold)
Botrytis allii
1 host plant · Fungal
Last updated
Data Coverage 3 of 6 dimensions
Neck Rot (Gray Mold) can show up on landscape plants, producing visible damage that ranges from leaf spots and discoloration to branch dieback depending on severity. Early detection gives you the best management options.
Start with sanitation: remove and dispose of affected material as you find it. Thin dense growth to improve air circulation, and redirect irrigation away from foliage. If the condition persists despite cultural adjustments, your local Extension office can help identify the pathogen and recommend targeted treatments.
Quick Reference
Agent Type
fungal
Causal Agent
Botrytis allii
Host Plants
1
Management
Cultural Controls
- An integrated strategy combining environmental management, cultural practices, and fungicides will most effectively manage this disease.
- Thoroughly clean and sanitize the greenhouse before production.
- Remove all dead and dying plant parts (particularly blossoms) on and around plants and take them out of the greenhouse.
- Many growers use closed containers to minimize the amount of conidia.
- Maintain a steady, relatively dry environment by keeping greenhouse humidity below 90%, increasing spacing between plants for good air circulation, and taking care not to splash water on foliage during watering.
- Heating the greenhouse at night (especially for zero or negative DIF) or venting around sunset may be necessary.