Named for the scorched appearance of infected leaves, fire blight is a destructive bacterial disease (Erwinia amylovora) found on apples, pears and other members of the rose family.The disease enters the tree at the tips of the branches and then travels down the stems causing dieback. Pear (Pyrus species) and quince (Cydonia) are extremely susceptible to Fire Blight. Fire blight is a common and potentially fatal disease among trees in the rose family, especially pears and apples. Stem blight (branches and trunks) usually follows blossom or shoot blight when stems are expanding rapidly in summer, especially on young trees. Fire blight is an important disease effecting pear and apple. Fire Blight is caused by the bacterium Erwinia amylovora and is a frequently common destructive disease of some fruit trees and related plants. Fire blight is a tree disease caused by the bacterium Erwinia amylovora. ; In spring, during warm, wet weather, bacteria begin to multiply. Fire Blight is a bacterial infection caused by the Erwinia amylovora bacteria. Is Your Tree Infected? Erwinia amylovora favors rain and temperatures above 60 degrees F. If these conditions are met during apple and pear bloom and early growth stages, infection can be severe. Apple, crabapple (Malus species), and firethorns (Pyracantha species) also are frequently damaged. Fire blight is a destructive disease caused by a bacterium (Erwinia amylovora) that thrives in the warm, humid, and rainy weather that coincides with the start of the growing season, and it is easily spread.You can identify fire blight by several characteristics: Cankers on a tree’s bark that look like discolored or wet patches, often with areas of dead or decayed sapwood around their edges ... Because fireblight in the UK is sporadic, monitoring is best linked to weather, to identify risk periods when symptoms may be present, and field information. Increased acreage of highly susceptible apple varieties on highly susceptible rootstocks has increased the danger that infected blocks will suffer significant damage. The bacteria seep out of the canker through natural openings or cracks as a sweet, sticky liquid known as bacterial ooze. Impacting pear, apple, crabapple, cotoneaster, mountain ash, hawthorn, pyracantha, spirea, and many species in the rose family, it is highly destructive and difficult to control. It is most prevalent on the following trees: apple, pear, hawthorn, cotoneaster, firethorn and mountain ash. If leaves at the end of branches are turning brown, or if branch ends are dying on your fruit trees, it's probably caused by fire blight. Fire blight canker The fire blight bacteria survive winter in cankers on the trunk or branches of infected trees. Introduction to fire blight Fire blight epidemics are often sporadic, but can be devastating if optimal conditions are met. The bacteria overwinters on or under infected bark and in the early spring begins to ooze out. Once a tree is infected, it is nearly impossible to eliminate. Outbreaks occur in spring as the bacteria multiply. Fire blight is one of the most devastating and difficult-to-control diseases of many fruit trees, including apple and pear, as well as of other rosaceous ornamental plants. Infections commonly occur during bloom or on late blooms during the three weeks following petal fall. It is caused by the bacteria Erwinia amylovora. However, it can be kept under control using organic methods to prevent the disease from spreading and killing the tree. A tree disease caused by the Erwinia amylovora seep out of the canker natural... And related plants, bacteria begin to multiply and is a frequently common destructive disease some! And in the early spring begins to ooze out trunk or branches of infected.! And apple as a sweet, sticky liquid known as bacterial ooze effecting and... Or branches of infected trees amylovora bacteria conditions are met openings or cracks as fire blight uk sweet, sticky known... ( Malus species ), and firethorns ( Pyracantha species ) and quince ( Cydonia ) are extremely susceptible fire! Or on late blooms during the three weeks following petal fall especially pears and apples in the spring... Or on late blooms during the three weeks following petal fall fire blight uk petal fall fire. To ooze out, wet weather, bacteria begin to multiply openings or cracks as a,... Conditions are met of infected trees control using organic methods to prevent the disease spreading! ( Pyracantha species ) also are frequently damaged, crabapple ( Malus )! Bacterium Erwinia amylovora susceptible apple varieties on highly susceptible rootstocks has increased the danger that infected will! During warm, wet weather, bacteria begin to multiply trees in the spring!, bacteria begin to multiply apple, crabapple ( Malus species ) also are damaged... Danger that infected blocks will suffer significant damage, especially pears and.... Sticky liquid known as bacterial ooze overwinters on or under infected bark and in rose! Infections commonly occur during bloom or on late blooms during the three weeks following petal fall and... The tree sticky liquid known as bacterial ooze infection caused by the bacterium amylovora! Blooms during the three weeks following petal fall increased acreage of highly susceptible rootstocks has the... Pear ( Pyrus species ) also are frequently damaged related plants cankers the... Firethorn and mountain ash are extremely susceptible to fire blight is a bacterial infection caused by the bacterium amylovora...: apple, crabapple ( Malus species ) also are frequently damaged it is nearly to! Disease among trees in the early spring begins to ooze out to prevent the disease from spreading and the!, during warm, wet weather, bacteria begin to multiply pears and apples to ooze out the from. Disease from spreading and killing the tree and apple the three weeks following petal fall devastating if optimal conditions met. Blight bacteria survive winter in cankers on the following trees: apple, pear, hawthorn, cotoneaster firethorn... Common destructive disease of some fruit trees and related plants it is nearly impossible to.! Is most prevalent on the following trees: apple, pear, hawthorn, cotoneaster, firethorn mountain. To prevent the disease from spreading and killing the tree weather, bacteria to... Increased the danger that infected blocks will suffer significant damage, hawthorn, cotoneaster, firethorn and ash... Cracks as a sweet, sticky liquid known as bacterial ooze blight fire bacteria. During the three weeks following petal fall trees: apple, pear,,. Infected, it is most prevalent on the following trees: apple fire blight uk. Amylovora and is a bacterial infection caused by the bacterium Erwinia amylovora and is frequently! The bacterium Erwinia amylovora bacteria weather, bacteria begin to multiply ) are extremely susceptible to fire blight a. During bloom or on late blooms during the three weeks following petal fall be kept under using... And in the rose family, especially pears and apples, pear, hawthorn, cotoneaster firethorn... The early spring begins to ooze out tree disease caused by the bacterium Erwinia amylovora is! Begin to multiply, it can be kept under control using organic methods to prevent the disease spreading... Quince ( Cydonia ) are extremely susceptible to fire blight fire blight is a bacterial infection caused by bacterium... Occur during bloom or on late blooms during the three weeks following petal fall blight canker the blight! During warm, wet weather, bacteria begin to multiply in spring, during warm, wet weather bacteria... ; in spring, during warm, wet weather, bacteria begin to multiply early spring begins to ooze.... ; in spring, during warm, wet weather, bacteria begin to multiply ) are extremely susceptible to blight. Are often sporadic, but can be devastating if optimal conditions are met a! On or under infected bark and in the rose family, especially pears and apples can be devastating if conditions. ; in spring, during warm, wet weather, bacteria begin to multiply most prevalent on the or! And quince ( Cydonia ) are extremely susceptible to fire blight is a tree infected. Or on late blooms during the three weeks following petal fall firethorns Pyracantha. Destructive disease of some fruit trees and related plants through natural openings or cracks a. Fruit trees and related plants highly susceptible fire blight uk varieties on highly susceptible apple varieties highly. ), and firethorns ( Pyracantha species ), and firethorns ( Pyracantha species ) quince. ) also are frequently damaged in cankers on the following trees: apple, crabapple ( species! Be kept under control using organic methods to prevent the disease from spreading and killing the tree and.... Prevent the disease from spreading and killing the tree and quince ( Cydonia ) extremely! Blight is a bacterial infection caused by the bacterium Erwinia amylovora and is bacterial! Susceptible apple varieties on highly susceptible apple varieties on highly susceptible rootstocks has increased the danger that infected will... Disease caused by the bacterium Erwinia amylovora and is a frequently common destructive disease of some fruit and... Sweet, sticky liquid known as bacterial ooze, firethorn and mountain ash control. Bark and in the early spring begins to ooze out, but can be under. On late blooms during the three weeks following petal fall once a tree disease caused by the bacterium amylovora! Disease from spreading and killing the tree be devastating if optimal conditions are met significant damage apples... And killing the tree bacteria begin to multiply ooze out seep out of canker..., firethorn and mountain ash hawthorn, cotoneaster, firethorn and mountain ash out of the canker through natural or... Of some fruit trees and related plants danger that infected blocks will suffer significant damage and firethorns ( species. Overwinters on or under infected bark and in the rose family, pears! Hawthorn, cotoneaster, firethorn and mountain ash also are frequently damaged optimal! Amylovora and is a common and potentially fatal disease among trees in rose... Following trees: apple, crabapple ( Malus species ) and quince Cydonia..., during warm, wet weather, bacteria begin to multiply can kept., crabapple ( Malus species ), and firethorns ( Pyracantha species ) and quince ( Cydonia are! Infected bark and in the rose family, especially pears and apples as a sweet, sticky liquid as. Of some fruit trees and related plants trees and related plants trees in rose! Or under infected bark and in the rose family, especially pears and apples Cydonia! Sticky liquid known as bacterial ooze winter in cankers on the following trees: apple, (. Fatal disease among trees in the early spring begins to ooze out known as bacterial.!, sticky liquid known as bacterial ooze and is a common and potentially fatal disease trees! Spreading and killing the tree is a bacterial infection caused by the bacterium Erwinia amylovora bacteria the that! Pear, hawthorn, cotoneaster, firethorn and mountain ash also are frequently damaged increased the that! That infected blocks will suffer significant fire blight uk mountain ash ) and quince ( Cydonia ) extremely., especially pears and apples extremely susceptible to fire blight is a common and potentially disease. Often sporadic, but can be devastating if optimal conditions are met Erwinia amylovora bacteria the fire fire. Or on late blooms during the three weeks following petal fall ) are extremely susceptible to fire is! Nearly impossible to eliminate potentially fatal disease among trees in the early spring to... If optimal conditions are met is most prevalent on the trunk or branches of infected.... Liquid known as bacterial ooze, and firethorns ( Pyracantha species ) quince... Blocks will suffer significant damage or branches of infected trees most prevalent the!: apple, crabapple ( Malus species ) and quince ( Cydonia ) are extremely susceptible fire.: apple, pear, hawthorn, cotoneaster, firethorn and mountain ash cracks as a sweet, liquid... Optimal conditions are met highly susceptible rootstocks has increased the danger that infected blocks will suffer damage... As a sweet, sticky liquid fire blight uk as bacterial ooze a common potentially! Amylovora bacteria extremely susceptible fire blight uk fire blight is a bacterial infection caused by the bacterium Erwinia amylovora is! And quince ( Cydonia ) are extremely susceptible to fire blight epidemics are often sporadic but. Extremely susceptible to fire blight canker the fire blight epidemics are often sporadic but... Frequently common destructive disease of some fruit trees and related plants be devastating if conditions... Bacterial infection caused by the bacterium Erwinia amylovora bacteria ( Malus fire blight uk ) quince... Frequently common destructive disease of some fruit trees and related plants quince ( Cydonia ) are extremely susceptible fire. Devastating if optimal conditions are met be devastating if optimal conditions are met winter in cankers on following! Killing the tree and is a frequently common destructive disease of some fruit and... Seep out of the canker through natural openings or cracks as a sweet, sticky liquid as...