Arbor Day Traditions
Walla Walla and College Place are Tree Cities
April 25, 2019
EARTH—Arbor Day falls on Fri., April 26, 2019. Celebrate by planting a tree or caring for one that could use some attention.
There are several reasons for a tree to not look its best. Drought tends to cause leaf wilting, leaf scorch, stem dieback, and increased susceptibility to pests and diseases.
Diseases vary depending upon the species of tree and the region of growth. Some of the most common diseases to look out for are Dutch Elm Disease, Dogwood Anthracnose, and Sudden Oak Death.
Other reasons a tree’s health might decline are improper planting and another, more invasive species....