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Find out how to identify, and treat, box blight in your garden. Box blight (Cylindrocladium buxicola) is a fungal disease that affects box (Buxus) plants. It first appeared in Britain in 1998 and is worst in warm, humid conditions. Box blight causes leaf browning and stem dieback.
What is box blight? Box blight is a disease of box leaves and stems caused by two closely related fungi, Calonectria pseudonaviculata and Calonectria henricotiae (syn. Cylindrocladium buxicola). The two species of Calonectria differ in their sensitivity to some fungicides (triazoles).
What does box blight look like? You need to catch box blight early on for the best chance of managing it effectively. The fungus is active all year round, but especially in wet conditions, when you are most likely to find visible fungal growth on an infected plant.
5 dni temu · Leaves turn brown and fall off, leaving bare patches. Black streaks and dieback will be visible on the stems. In wet conditions, you may also be able to see white spore masses of the fungus under infected leaves. Another fungal disease, Volutella blight, may initially be confused for box blight.
Tell-tale signs of box blight are the yellowing and browning of leaves, which then fall, leaving bare patches. You may also notice black streaks and dieback on young stems and white spores on the undersides of leaves. Box blight can be confused with the effects of box caterpillar.
17 lip 2017 · What does box blight look like? Now let’s see how you can best identify the box blight. After all, the displayed symptoms depend on which fungus your plants are infected by.
Typically you are looking for patches on your box plants where the leaves have gone brown or have fallen, leaving bare stems. Infected stems will have distinctive black streaks and dieback (i.e. are no longer green under the bark).
