Fire Blight

Fire_blight_pic_1_letter_Afire_blight_pic_2_with_letter_BA: Shoots infected with fire blight. | B: Flowers infected with fire blight.

Fire blight is the most damaging bacterial disease that affects shrubs and trees in the Rosaceous family during warm spring weather combined with rains or heavy dews. This disease is most often found in pear, apple, loquat and crabapple trees and has become a nuisance to homeowners and commercial landscape managers. Flower infections can be introduced by bees and other insects from infected wood cankers that ooze bacterial substance in the spring. Trees infected with the fire blight bacterium Erwinia amylovora often have extensive limb cankers and dieback with a characteristic “Shepherd’s Crook” appearance at the tips of the shoots.


The first sign of a fire blight infection is early death of flowers and then green shoots immediately adjacent to the flower petiole. The bacterium moves into the wood of twigs and lateral branches, which express black cankers and can turn completely black. By further spreading of the bacterium with rain splashes and insects to other flowers and shoots, symptoms will often appear scattered throughout the canopy. However, if the weather conditions are most favorable for disease progression and spreading, the whole canopy can be severely affected with a burned appearance thus explaining the name “fire blight.”

Info Source: Arborjet

Trees will recover from infestation and will be protected from this disease after the effective treatment that Joe’s Tree Care offers. We have certified arborists that can help you keep your trees health! Call us today! 512-215-1551