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Black Dicolouration

Ciborinia whetzelii
(Ink Spot)

Discula destructiva
(Dogwood Anthracnose)

Mycosphaerella populicola
(Other Broadleaf Foliar Diseases)

Rhytisma punctatum
(Tar Spot of Maple)

Rhytisma salicinum
(Tar Spot of Willow)

Venturia macularis
(Aspen and Poplar Leaf and Twig Blight)

Venturia populina
(Aspen and Poplar Leaf and Twig Blight)