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Image Subject Name Scientific Name Description
5042052 ash yellows phytoplasma Candidatus Phytoplasma fraxini Witches' broom on white ash
5047024 decay Severe decay in a willow.
5040068 oak wilt Ceratocystis fagacearum Red oak with oak wilt, shedding leaves and marked for removal
5055015 Eutypella canker Eutypella parasitica A very large Eutypella canker in Norway maple, in an urban setting
5055024 Leucostoma canker of spruce Leucostoma kunzei Branch mortality in blue spruce caused by Leucostoma canker
5038074 oak wilt Ceratocystis fagacearum Oak wilt crown symptoms.
5043046 Armillaria root rots Armillaria spp. Windthrow caused by Armillaria root rot in a large bur oak on a golf course.
5033099 Eutypella canker Eutypella parasitica A Eutypella canker ("cobra-head" canker) on sugar
5033100 Eutypella canker Eutypella parasitica A large Eutypella canker on sugar maple.
5031068 Rhizosphaera needle cast Rhizosphaera kalkhoffii
5031055 Rhizosphaera needle cast Rhizosphaera kalkhoffii Rhizosphaera needle cast on white spruce. Off color foliage.
5031050 Rhizosphaera needle cast Rhizosphaera kalkhoffii Rhizosphaera needle cast associated with a decline of white spruce in Wisconsin
5031053 Rhizosphaera needle cast Rhizosphaera kalkhoffii Rhizosphaera needle cast on lower branches of white spruce.
5031054 Rhizosphaera needle cast Rhizosphaera kalkhoffii Rhizosphaera needle cast on white spruce windbreaks in a nursery.
5031060 Rhizosphaera needle cast Rhizosphaera kalkhoffii Off color foliage infected with Rhizosphaera kalkhoffii.
5251041 ash decline Decline symptoms in ash tree in Iowa.
5045006 oak wilt Ceratocystis fagacearum
5030032 Cytospora canker of spruce Valsa kunzei Cankers on the lower branches of a blue spruce.
5030047 oak anthracnose Apiognomonia errabunda
5029008 Dutch elm disease Ophiostoma ulmi Early wilt symptoms of Dutch elm disease.
5029009 Dutch elm disease Ophiostoma ulmi discoloration in wood; Vascular streaks caused by Ophiostoma ulmi in elm wood.
5031023 white oak Quercus alba
5032044 Verticillium wilts Verticillium spp.
5032045 Verticillium wilts Verticillium spp.
5037026 Verticillium wilts Verticillium spp.
5041067 Diplodia blight Sphaeropsis sapinea
5041068 Diplodia blight Sphaeropsis sapinea
5041069 Diplodia blight Sphaeropsis sapinea
5041070 Diplodia blight Sphaeropsis sapinea
5041071 Diplodia blight Sphaeropsis sapinea
5041072 Diplodia blight Sphaeropsis sapinea
5038038 Dutch elm disease Ophiostoma ulmi
5038044 Dutch elm disease Ophiostoma ulmi crown symptoms
5037071 black knot Apiosporina morbosa on main stem

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