EPPO Global Database

Erwinia amylovora(ERWIAM)

Photos

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Infected flower cluster of Cotoneaster sp.

Infection on Crataegus sp., showing less severe foliar symptoms than on pear.

Courtesy: Rijksstation voor Plantenziekten (NL).

Blighted pear blossoms.

Mummified appearance of infected pear.

Bacterial ooze on an infected shoot.

Courtesy: INRA Angers (FR).

Growth of Erwinia amylovora on Kings B medium.

Growth of Erwinia amylovora on Kings B medium (typical colony).

Growth of Erwinia amylovora on CCT growing medium.

Growth of Erwinia amylovora on CCT growing medium (typical colony).

Ooze production on a fruit slice after artificial inoculation (fruitlet test).

Infected apple flower.

Dieback of infected shoots of Cotoneaster sp.

Amber coloured ooze.

Courtesy: INRA Angers (FR).

Dieback of infected shoots of Malus sp.

Symptoms on Cydonia oblonga.

Courtesy: R. Grimm (CH).

Infected apple fruit (cv. Granny Smith).Note the characteristic droplets of exudate on the fruit and peduncle.

Courtesy: P.G. Psallidas, Benaki Institute, Athens (GR).

Symptoms of E. amylovora in Pyracantha.

Courtesy: M.M.López, IVIA, Valencia, Spain.

Symptoms of fire blight in pear shoots.

Courtesy: M.M.López, IVIA, Valencia, Spain.

Colonies of E. amylovora on CCT.

Courtesy: M.M.López, IVIA, Valencia, Spain.

Inoculation on leaves of detached pear shoots: left, negative control; right, E. amylovora.

Courtesy: P. Llop, IVIA, Valencia, Spain.

Symptoms of fire blight in an apple shoot

Courtesy: M.A.Cambra, D.G.Aragón, Spain.

Canker caused by E. amylovora on pear trunk.

Courtesy: M. Cambra, IVIA, Valencia, Spain.

Typical canker on Cydonia oblonga (quince).

Courtesy: P.G. Psallidas, Benaki Institute, Athens (GR).

Symptoms on Pyrus salicifolia

Courtesy: R. Grimm (CH).

Shoot of pear cv. Santa Maria showing typical symptoms.

Courtesy: P.G. Psallidas, Benaki Institute, Athens (GR).

General view of an infected pear orchard (cv. Krystali).

Courtesy: P.G. Psallidas, Benaki Institute, Athens (GR).

Symptoms on Cotoneaster watereri.

Courtesy: R. Grimm (CH).

Symptoms of E. amylovora in immature pear fruits after inoculation.

Courtesy: V. Donat, IVIA, Valencia, Spain.

General view of a wild pear tree (Pyrus amygdaliformis) affected by E. amylovora.

Courtesy: P.G. Psallidas, Benaki Institute, Athens (GR).

Symptoms on Cotoneaster salicifolius floccosus.

Courtesy: R. Grimm (CH).

Symptoms of fire blight in pear blossoms

Courtesy: M. Cambra, IVIA, Valencia (ES)

Necrosis on pear tree leaves and typical shepherd’s crook

Typical symptoms of fire blight on Crataegus sp. shoot

Mummified immature pear fruits with small ooze drops

Typical symptoms of fire blight on pear tree branches

Typical symptoms of fire blight on quince shoot

Typical symptoms of fire blight on Pyracantha sp. branches

Typical colony morphology on King’s medium

Typical colony morphology on CCT media

Canker on a pear tree after removing bark showing necrotic inner tissues

Typical symptoms of fire blight on apple shoot

Typical symptoms of fire blight on loquat shoot

Typical symptoms of fire blight on Cotoneaster sp. shoot

Typical symptoms of fire blight on Pyracantha sp. branches

Typical colony morphology on Levan (NSA) medium