什么叫林木病害在林木生长发育过程中,由于环境条件的不适宜,或是受到其它生物的侵染,引起生理上,解剖和形态上一系列的变化,使林木的生长发育产生不正常的现象,甚至引起整个植株的死亡,因而降低或丧失了对人类的经济价值,这种现象称为林木病害。林木病害的发生有一定的病理变化过程,称为病程。而林木的机械损伤,没有病理程序,故不属 What is forest disease in the process of forest growth and development, due to the inappropriate environmental conditions, or by other organisms, causing a series of physiological, anatomical and morphological changes, so that the growth and development of trees produce abnormal phenomenon , And even cause the death of the whole plant, thereby reducing or losing the economic value to human beings. This phenomenon is called forest disease. Forest disease occurs a certain pathological change process, known as the disease course. The mechanical damage forest, there is no pathological process, it does not belong