Editing Fire blight (section)

==Symptoms==
[[Image:Fire blight (Erwinia amylovora) of pear.png|thumb|left|Fire blight on a pear tree caused by ''Erwinia amylovora'']]
Tissues affected by the symptoms of ''Erwinia amylovora'' include blossoms, fruits, shoots, and branches of apple (Pomoideae), pear, and many other rosaceous plants. All symptoms are above ground and are typically easy to recognize. Symptoms on blossoms include water soaking of the floral receptacle, ovary, and peduncles.<ref>{{Cite web |url=https://www.plantdiseases.org/sites/default/files/plant_disease/narratives/2.pdf |title=Fire Blight of Apple and Pear |last=Schroth |first=M.N. |date=2010 |website=plantdiseases.org |url-status=live |archive-url=https://web.archive.org/web/20200118044612/https://www.plantdiseases.org/sites/default/files/plant_disease/narratives/2.pdf |archive-date=January 18, 2020 |access-date=January 17, 2020}}</ref> This results in a dull, gray-green appearance 1–2 weeks after petal fall, and eventually tissues will shrivel and turn black. The base of the blossom and young fruit show similar symptoms as infection spreads. Opaque white- or amber-colored droplets of bacterial ooze can be seen on the infected tissue in high humidity. Shoots show similar symptoms but these develop much more rapidly. A “Shepherd's Crook” can occur when the tip of the shoot wilts, and diseased shoot leaves typically have blackening along the mid-vein and before they die. When numerous, diseased shoots give the tree a blighted appearance. Infection of blossoms and shoots can spread to larger tree limbs. Branches will darken and become water soaked, eventually cracks will develop in bark. Wood under the bark will become streaked with black discoloration. Immature fruit forms water-soaked lesions and later turns black. Bacterial ooze can be found on these lesions. Severe infections result in fruit turning entirely black and shrivelling.<ref name="Johnson">{{cite journal |last1=Johnson |first1=K. B. |title=Fire blight of apple and pear |journal=The Plant Health Instructor |date=2000 |doi=10.1094/PHI-I-2000-0726-01}}</ref>