The Dutch Elm disease was introduced to North America when a furniture company in Cleveland, Ohio unknowingly brought the infected logs from France.This disease is spread from tree to tree by the fungus, Ophiostroma ulmi thorugh insects and smaller European beetle and the native elm bark beetle are the most common insects that spread the disease.Pruning, insecticides, fungicides, disposal, surveillance are the steps to stop the spread of the disease.
The chestnut blight was introduced to North America from japanese nursery stock. It is a canker disease caused by Endothia parasitica. The fungus enters through wounds on trees and grows in and beneath the bark which kills the cambium from twig, banch or trunk. It can also be spread by the spores
The chestnut blight was introduced to North America from japanese nursery stock. It is a canker disease caused by Endothia parasitica. The fungus enters through wounds on trees and grows in and beneath the bark which kills the cambium from twig, banch or trunk. It can also be spread by the spores