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Botrytis Bud and Twig Blight

Botrytis cinerea

19 host plants

Last updated

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

Botrytis bud and twig blight causes bud death and twig dieback on susceptible hosts. You'll notice brown, fuzzy fungal growth on affected buds and shoots during cool, moist weather. The disease favors spring conditions with cool temperatures and high humidity. Remove infected buds and twigs promptly, improve air circulation, and avoid overhead watering that keeps plants wet.

Collect and destroy infected plant debris and tissues from and around the plant. 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.

Quick Reference

Causal Agent
Botrytis cinerea
Host Plants
19

Management

Cultural Controls

  • Collect and destroy infected plant debris and tissues from and around the plant.
  • 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.
  • Heating in the morning before sunup can also help prevent dew formation as air temperature increases faster than the temperature of plant parts.
  • If using DROP or DIP for size control, do not let humidity rise above 90%.
  • Space plants for adequate air movement.

Host Plants (19)