Pests and Diseases

Blog Archives

Information of tree and shrub pests and diseases.

Treating Bacterial Leaf Scorch

bacterial leaf scorch 150x150 - Treating Bacterial Leaf Scorch

Bacterial leaf scorch (BLS) is caused by the bacterium Xylella fastidiosa. This disease impacts certain shade trees resulting in uneven ‘scorching’ of leaf margins in late summer and early fall. The bacteria themselves live in the xylem tissue and gather

Posted in Pests and Diseases, Tree Advice

Managing Tree Root Diseases

armillaria 150x150 - Managing Tree Root Diseases

Two common causes of root disease in California are species of the fungus Armillaria and species of Phytophthora, which are fungus-like organisms. There are many differences between the two pathogens, but effective management of both involves creating growing conditions that

Posted in Pests and Diseases, Tree Advice

Lichen and Trees

lichen on tree branch 150x150 - Lichen and Trees

So the trunk of your tree or shrub is covered in crusty green stuff – don’t panic! It’s unlikely that this ‘green stuff’ is harming the tree. What you are observing is the growth of lichen on the bark. Lichens

Posted in Environmental Issues, Pests and Diseases, Tree Advice

Look Out for Leaf Curl and Leaf Blister

nectarine with peach leaf curl 150x150 - Look Out for Leaf Curl and Leaf Blister

Leaf curl and leaf blister are a group of diseases caused by the fungus Taphrina. Taphrina caerulescens is the causal agent of oak leaf blister, and Taphrina deformans is the causal agent of peach leaf curl. These diseases are common

Posted in Environmental Issues, Pests and Diseases, Tree Advice

California Oakworm

california oakworm moth larvae 150x150 - California Oakworm

The coast live oak is an important part of both the wild and urban landscape through most of coastal California. When these beloved trees are defoliated by our native oakworm it can be a dramatic sight for the home owners.

Posted in Pests and Diseases Tagged with: Caterpillar, Coast Live Oak, Oak worm, Oakworm
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Being a leader in the tree care industry means continually focusing on learning and innovation. Bartlett’s Tree Topics blog follows in that tradition by offering a place to receive advice on trees, tree pests, tree preservation, and more.

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