Caused by a fungus, Ceratocystis fagacearum, oak wilt invades the vascular system of trees. The disease can cause rapid decline and even death of infected plants. Susceptibility to this disease varies among oak species; members of the red oak group…
Monthly Archives: June 2018
Tree Growth Regulators
When native desert plants are irrigated regularly, they can produce a tremendous amount of new growth. This can be good from the perspective of shade and screening, but the new growth is often weak and can fail during storms. In…
Posted in Tree Advice, Tree Pruning
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…
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…
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