Dutch Elm Disease
By Brooke Rozum
Dutch Elm Disease (DED)
Dutch Elm Disease is caused by three different types of beetles. The three types of beetles are called The Native elm bark beetle, The European elm bark beetle, and The banded elm bark beetle. The beetles eat the fungus from a tree, then goes to another tree and gets the healthy tree infected. People have noticed that the infected trees have been dying so they have been making vaccines (as seen in the video). The first symptom of infection is usually in the upper branch of the tree, where the leaves start to wither and yellow in summer, months before when they actually should start to change color and fall off in autumn.
Dutch Elm Disease | Cohen and Master