The term “tree disease” covers a wide range of pathogenic infections, abnormalities, and disturbances of the normal structure and growth of a tree. Tree diseases lead to poor growth of trees and decrease of annual growth of wood, some diseases cause the death of whole trees and even the decline of a large area of forest. Forest and tree disease is a kind of very common natural disasters. In history, some tree diseases have caused serious ecological damage or great economic losses, such as dutch elm disease, chestnut blight, cytospora canker of hardwood, and so on.
The research object of forest and tree pathology is the diseases of forest trees, including urban greening and ornamental and shrub trees diseases.
The appearance and commercial and recreational use of forested land is greatly affected by diseases, insects, fire, and adverse weather.Of these, diseases and wood decay cause the greatest losses and present the greatest threat to tree growth, outranking all other agents in destructiveness. Infection process of tree diseases is relatively long because of the long growth period of trees. Many diseases cause people's obvious attention, only after causing obvious disasters, this is because the occurrence and development of tree diseases have great concealment.
Welcome to the class of forest and tree pathology.This course will lead you to learn the causes of forest diseases, occurrence conditions, biological characteristics of biotic factors, symptoms, disease cycle and control measures of various forest diseases.The course is not only convenient for us to learn the content of forest and tree pathology, but also help us to learn and improve professional English.
