Cankers are formed on trunk and twigs. Twigs and large sections of the host may be killed. Symptoms Fire blight will appear as if the host has been brushed with fire. The leaves turn black to brown, shrivel, and droop. Cankers will appear on branches and trunks and in the spring will have a yellowish ooze coming from its margins.
Fruit also appears water-soaked, then turns dark.
Infected flowers will appear water-soaked at first, then turn brown. There are three main objectives to consider in treatment reduction of inoculum available to cause infection reduction of the suceptibility of the host control of insect vectors Remove infected twigs and cankers during the dormant season. Do not overfertilize or perform excessive pruning. Plant cultivars which exhibit resistance to Fire Blight. Control insect vectors.