Cedar-Apple Rust Gall

Description:

This fungus alternates between hosts, most often Eastern Red Cedar and apple trees, though other junipers and members of the Rosacea can provide a substitute host. The first two images are of an immature gall, the final image is of an expended gall. During the spring rains each dimple will produce a gelatinous protusion, holding up it's spores to the wind. Once they land on an apple tree or suitable substitute, infection can occur in little as four hours, causing yellow blemishes on the leaves. These spots turn black and tube like structure are produced on underside of leaves, sending more spores to the wind and when landing on juniper completing the lifecycle.

Habitat:

Near orchard within nature sanctuary