Fire Blight: This disease is caused by Erwinia amylovora and it attacks more than 75 species of trees and shrubs.Cankers: Living organisms such as fungi and bacteria, or nonliving factors including excessive temperatures or hail can cause this disease.Anthracnose: Many deciduous hardwoods are particularly susceptible to this leaf disease, which is caused by various species of the fungus Apiognomonia.Some of the most common diseases that can affect trees and shrubs include: The weather can also be very unforgiving, particularly in the winter when heavy snow and ice storms can cause major damage to your trees and shrubs. But it’s not just diseases that can injure trees and shrubs. It is possible to learn how to scout for fungus and bacteria and manage diseases. The process for diagnosing problems with your trees and shrubs includes identifying signs and symptoms. There are also certain diseases that you can only confirm with laboratory analysis. Some are very easy to identify, while others require expert knowledge, as there can be many look-alike diseases and hidden clues. Common Tree and Shrub Diseasesĭiagnosing diseases with trees and shrubs can be challenging. Find tips on dealing with rot, scale, blight, mold, gall, canker, and insect pests such as moths, caterpillars, worms, beetles, borers, spiders, and lanternflies. In this section, you’ll find information on weed management and control of trees and shrubs, including mulching, herbicides, and pesticides. Keeping your trees and shrubs healthy means you have to address pests, weeds, and diseases at the onset.
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