Boxwood blight is a common fungal disease found in boxwoods caused by Cylindrocladium buxicola (also commonly known as Calonectria pseudonaviculata). All the infected plants are subject to full destruction; this is why this disease is highly dangerous. The boxwood blight is specifically dangerous to the evergreen boxwood young plants. It particularly begins with young leaves and shoots and is normally accompanied by wet weather against the background of moderately warm temperatures (about 24°C) that contribute to its rapid development. Even a few hours of such weather makes boxwood leaves permeable to the pathogen. The fungal spores that infect plants can remain in the soil and unclean plant litter or be introduced with new seedlings. The spores can stay there without harm to themselves for 3-4 years.
Boxwood Blight Treatment
Signs of damage
- The disease begins to manifest itself as spots or lesions colored from light to dark shades of brown located on leaves;
- The leaves colorimetric eventually turns to straw or brown;
- The result is an active fall of leaves.
How to prevent
Control the airflow and increase it by pruning the lowest branches on surrounding trees and large shrubs. If you are dedicated to preventing blight, ensure that you do not prune the plant with wet foliage. Also, through foliage fertilization, you will be able to increase fertility and avoid boxwood blight.
Heal
Unfortunately, no effective treatment exists. There is no way actually to control the spread of the disease. Although it is possible to try a few options for chemical treatment, they are overpriced and laborious. Using fungicides on the whole affected plant can stop the spread of boxwood blight. Early detection is the key to controlling this infection. In the early stages, you should cut the infected branches of the plant and clean up the ground thoroughly.
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