![Primarily seen in greenhouse production, but can be seen in the landscape also. Cloudy humid conditions for several days favor disease development. All hydrangea species are susceptible to B. cinereae. Primarily seen in greenhouse production, but can be seen in the landscape also. Cloudy humid conditions for several days favor disease development. All hydrangea species are susceptible to B. cinereae.](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/BotrytisCllint7 CP NEW_thumb.jpg)
Primarily seen in greenhouse production, but can be seen in the landscape also. Cloudy humid conditions for several days favor disease development. All hydrangea species are susceptible to B. cinereae.
![Small water-soaked spots can be seen on the margin of the leaves Small water-soaked spots can be seen on the margin of the leaves](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/07-654J CP NEW_thumb.jpg)
Small water-soaked spots can be seen on the margin of the leaves
![The watersoaked regions expand to reddish brown spots The watersoaked regions expand to reddish brown spots](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/07-654C CP NEW_thumb.jpg)
The watersoaked regions expand to reddish brown spots
![Symptoms on the margin of the leaves Symptoms on the margin of the leaves](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/07-654B CP NEW_thumb.jpg)
Symptoms on the margin of the leaves
![Symptoms on the stem. Symptoms on the stem.](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/07-654R CP NEW_thumb.jpg)
Symptoms on the stem.
![Burn-like patches on the leaves due to the disease. Burn-like patches on the leaves due to the disease.](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/BotrytisCllint6 CP NEW_thumb.jpg)
Burn-like patches on the leaves due to the disease.
![Symptoms on a leaf. Symptoms on a leaf.](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/BotrytisCllint5 CP NEW_thumb.jpg)
Symptoms on a leaf.
![The leaves and petals will be covered with a fuzzy gray growth of the causal fungus B. cinereae. The leaves and petals will be covered with a fuzzy gray growth of the causal fungus B. cinereae.](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/BotrytisCllint8 CP NEW_thumb.jpg)
The leaves and petals will be covered with a fuzzy gray growth of the causal fungus B. cinereae.
![Severely infected plant with masses of spores which can be easily seen with a hand lens. The spores are easily moved by wind, and greenhouse practices of over-watering and handling moves the spores around the production units. Severely infected plant with masses of spores which can be easily seen with a hand lens. The spores are easily moved by wind, and greenhouse practices of over-watering and handling moves the spores around the production units.](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/BotrytisCllint3 CP NEW_thumb.jpg)
Severely infected plant with masses of spores which can be easily seen with a hand lens. The spores are easily moved by wind, and greenhouse practices of over-watering and handling moves the spores around the production units.
![Botrytis can develop overnight under ideal environmental conditions.Cool, wet conditions favor rapid growth and reproduction of B. cinereae. The fungus can survive indefinitely in plant debris. Botrytis can develop overnight under ideal environmental conditions.Cool, wet conditions favor rapid growth and reproduction of B. cinereae. The fungus can survive indefinitely in plant debris.](images/botrytis/22161DD2C3964DF39A98F053EB87FBF3/BotrytisCllint4 CP NEW_thumb.jpg)
Botrytis can develop overnight under ideal environmental conditions.Cool, wet conditions favor rapid growth and reproduction of B. cinereae. The fungus can survive indefinitely in plant debris.