Browning In Older Leylandii Conifers.
Question
I have a row of Leylandii which have been in for 15 years and have been healthy to date.All of a sudden there appear to be a number of brown patches along the row where the the last 4-5 inches on some of the branches have gone brown.There is still a lot of green in each tree,but I want to avoid it getting worse.Is this a result of windburn and if so how can I prevent it getting any worse? Should I prune away the brown parts? .
Answer
There could be several reasons why the Leylandii trees are developing brown patches, including fungal or bacterial infections, pests, or environmental stressors such as drought or frost. Windburn can also cause brown patches on evergreens such as Leylandii, but it is usually more common in younger trees.
To prevent further damage, you should first identify the cause of the brown patches. You can inspect the trees for signs of pests or disease, such as small holes, webs, or discoloration. If you suspect a fungal or bacterial infection, you may need to apply fungicide or bactericide treatments to the affected areas.
If you believe that windburn is the cause, you can try to protect the trees from the wind by erecting a windbreak or barrier around them. Additionally, you can water the trees regularly to help them stay hydrated and avoid dry, brittle branches that are more susceptible to wind damage.
If there are only a few branches with brown patches, you can prune them away to prevent the damage from spreading. Make sure to use clean, sharp pruning tools to avoid further damage to the trees, and dispose of any infected plant material properly to prevent the spread of disease.
It’s always a good idea to consult with a professional arborist or horticulturist if you’re unsure of the cause of the brown patches or how to address them effectively.
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