MALUS DISEASE PROBLEMS
Scab is caused by the fungus Venturia inequalis. Infection takes place early in the season and dark olive Fire blight susceptible trees have blighted branch tips. The disease is caused by the bacterium Erwinia amylovora. Leaves on infected branch ... [... more]
Michigan State University Extension |
More information on pear bactericides
Erwinia amylovora bacteria overwinter in limb cankers and are spread by rain splash and insects. Infection occurs mostly through blossoms and less often through succulent shoots. Growth of the bacteria is favored by warm, humid weather in spring ... [... more]
University of California IPM |
More information on apple bactericides
Fire blight causes blossom clusters to wilt and collapse in late spring. A brownish, sticky exudate is produced from diseased tissue. The tips of infected young succulent shoots curve into a characteristic shepherd's hook. Erwinia amylovora ... [... more]
University of California IPM |
Fire Blight Management Guidelines
UC home and landscape guidelines for control of Fire Blight. Fire blight, caused by the bacterium Erwinia amylovora, is a common and frequently destructive bacterial disease of pome fruit trees and other related plants. Pear and quince trees are ... [... more]
University of California IPM |
Fire Blight of Ornamentals
Fire blight, caused by the bacterium Erwinia amylovora, is a serious disease of many ornamental species in the Rosaceae family. Certain varieties of apple, flowering crabapple, pear, pyracantha, and quince are highly susceptible. Other plants, ... [... more]
Virginia Tech Extension |
Life History
Fire blight is a disease caused by the bacterium Erwinia amylovora. This bacterium can attack more than 75 species of trees and shrubs including apple, pear, quince, mountain ash, crabapple, hawthorn, cotoneaster, serviceberry, and pyracantha. ... [... more]
Plant Pathology at Penn |
