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
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Pests and Diseases
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
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
One of the most under-diagnosed causes of tree failure are root rot pathogens. Here in southern California we have a few rots that plague our trees and I want to
If your trees or shrubs suffered badly from insect attack this year (e.g., aphid, scale, red spider mite, etc.), then there is an extremely high probability that they will be
Though strangely beautiful with their metallic green bodies and copper wings, Japanese beetles are a major pest in the eastern U.S. that feed on more than 300 different plant species.
Natural defense systems enable trees to ‘fight back’ when they’re under attack from pests or disease or facing stress from environmental conditions like drought. Even with these defense systems in
Would you be surprised to learn that soil conditions in urban environments are inhospitable to trees? That’s right. An urban growing environment is vastly different than the ideal conditions found
Most tree pests leave visible signs of their presence – if you know what to look for. Sometimes it’s easy to dismiss these observable symptoms. After all, it’s just a
“It is a capital mistake to before one has data” Sir Arthur Conan Doyle An unusual package has just arrived. Filled with plant material, the package is unboxed and the
Unusual is one of the best way to describe galls on trees. These abnormal plant growths are found on leaves, twigs, and branches. They range in size from tiny lumps
In our urban landscapes, pest outbreaks occur more frequently than in natural habitats such as wooded forests. These pest outbreaks occur from urbanization processes such as buildings and roads that
Anthracnose is one of the most common foliar diseases of landscape trees. It can impact virtually any species, though some, including sycamores, oaks, maples, ash and dogwood, are more susceptible
Oak processionary moth (OPM) is a dangerous pest that poses a risk to human and animal health. The Forestry Commission recommends surveying of oaks in the greater London area. Contact
We live in an age where computers increasingly play an ever-larger role in all facets of how we manage large amounts of information. Companies like Amazon and Apple use data