fire blight

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fire blight

[′fīr ‚blīt]
(plant pathology)
A bacterial disease of apple, pear, and related pomaceous fruit trees caused by Erwinia amylovora; leaves are blackened, cankers form on the trunk, and flowers and fruits become discolored.
References in periodicals archive ?
January: Prune fireblight from all trees; prune mature trees.
to prove that the apples come from trees that have not been infected with fireblight disease for at least several years.
Fireblight, which is harmless to humans, is a highly contagious disease in apples and pears, and is caused by a plant-eating bacterium and a highly contagious disease in apples and pears.
Notorious bacterial problems include fireblight that affects apples, crabapples, pears, and other members of the rose family and bacterial leaf spots that affect many plant species.
Farm ministry officials have defended the inspection procedures as ''not violating the SPS agreement'' and called it ''necessary to prevent the outbreak of fireblight disease.
Fireblight is the major problem of concern and should be treated as discussed earlier for apples.
There have been no indications of fireblight, powdery mildew or scabbing.
Choose from the new Saphyr series which are highly resistant to the usual pyracantha diseases of scab and fireblight and are also very hardy: Saphyr Cadange, a vigorous grower with large orange fruits from September; Saphyr Cadrou, moderately vigorous, bearing large red berries from October; and Saphyr Cadaune, vigorous with yellow berries from October.
Japan's requirements to prevent transmission of fireblight disease are ''not scientifically based, significantly raise costs, and reduce the competitiveness of U.
It is better grown under austere conditions, as lush new growth is susceptible to fireblight.
The most serious apple diseases are scab in mild parts of the Northwest and Northern California, fireblight east of the Cascades, and mildew in gardens with poor air circulation and too much shade.
COUNTRYSIDE: I was told some years ago, after an old apple tree developed fireblight, that some iron in the soil would help.