What is the main impact of fire blight on affected trees?

The primary impact of fire blight is the "fire-scorched" symptoms observed on various parts of the affected trees, particularly the blossoms, twigs, and branches. This bacterial disease, caused by Erwinia amylovora, produces a characteristic effect where the infected plant parts appear darkened and wilted, resembling fire damage. As the disease progresses, it can lead to significant dieback and can compromise the overall health and stability of the tree.

The presence of these symptoms indicates not only the physical damage to the plant but also signifies that the tree's vascular system has been affected, hampering its ability to transport nutrients and water effectively. Thus, while the disease does not primarily target the root system, it has a profound effect on the above-ground structures. This degradation can limit the tree's growth, yield, and ability to reproduce, making it essential for those in pest control and plant management to recognize and address fire blight adequately.