Samples with the following infectious diseases have appeared in the Plant Disease Clinic in the past week:

• Anthracnose on white oak, maple, and sycamore
• Ash flower gall
• Ash rust (see this week's main article)
• Dutch Elm Disease (PDF)
• Hickory downy spot
• Marssonina leaf spot on poplar
• Mite injury on spruce
• Oak leaf blister
• Pine wilt on Scots and white pine (PDF)
• Plum pockets
• Rhizosphaera needle cast on spruce