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7825
Jenny_Smith
Jenny_Smith
Fireblight
  Fireblight March 18, 2009
Fireblight is a destructive, highly infectious and widespread disease caused by the bacterium Erwinia amylovora.The disease affects plants in the Rosaceae family: Malus (apple and crabapple), Cotoneaster (cotoneaster), Prunus (flowering almond, plum and cherry), Chaenomeles (flowering quince), Crataegus (hawthorn), Eriobotrya (loquat), Sorbus (mountain ash), Photinia (photinia), Pyracantha (pyracantha) Rosa (rose), Amelanchier (serviceberry), Spirea (spirea) among others. The bacterium spend Fireblight
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6442
Jenny_Smith
Jenny_Smith
Disease of Coneflower
  Disease of Coneflower March 17, 2009
Coneflowers may get Pseudomanas or Xanthomonas leaf spot. Powdery mildew will also occur under the right weather conditions. Botrytis may also occur. May get brown dead areas as well as distorted leaves. These plants now get aster yellows. Disease of Coneflower




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