Most “sick tree” problems can be traced back to underlying stresses that have reduced the tree's vigor, making it more vulnerable to diseases or insect pests.
Browning or dieback is usually caused by weather-related stress, sometimes in combination with pests and diseases.
A guide for how to collect and where to get a sample analyzed for plant diseases.
Poison hemlock is one of the most poisonous of plants. Silage making has been used to reduce the concentrations of toxins in a variety of crops. Poison hemlock alkaloids are found in different concentrations depending on ...
A summary of the main trunk diseases causing issues in Oregon and management methods.