Cedar Apple Rust Gall with Telia Horns

Cedar Apple Rust Gall with Telia Horns

210527J8738

Cedar Apple Rust (Gymnosporangium juniperi-virginianae) gall with telia horns growing on a Eastern Red Cedar (juniper) tree in Prince Edward County, Ontario - with rain the horns will become orange gelatinous and the spores produced will infect apple trees (this fungus is passed between these species only)

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