Cedar leaf blight is a fungus of the Helotiaceae family that affects conifers in North America and Europe.
Similar:
Needle blight (Kabatina juniperi) – Juniperus spp.
Also known as:
Keithia (leaf) blight
Cedar leaf blight is a fungus of the Helotiaceae family that affects conifers in North America and Europe.
Infestation begins with small cream-colored spots on the top of the needles. The spots get bigger and grow into one big brown spot. Eventually, the needles turn completely brown. Interestingly, since only the infected needles turn brown, so both healthy and infected needles can occur on one branch.
The fungus thrives under humid conditions, with the needles remaining wet for long periods of time.
A similar fungus Kaba
Control
Cut away affected parts. Remove completely infested plants. To prevent further spread, the prunings or affected plants should be discarded – not on the compost heap.
Prevention
Make sure the wind has access between the plants. Check the lower branches from time to time, because fungus is visible there for the first time – also because the lower branches remain moist for a long time.
