Fig. 4. Rust-induced leaf spots on an apple cultivar that is resistant to cedar apple rust. By Kostina | Published 6 Dec 2013 | Full size is 541 × 487 pixels Fig. 3. Aecium of hawthorn rust showing characteristic long aecial tubes Fig. 5. Cedar apple rust gall on cedar showing teliohorns that develop during rains. Fig. 4. Rust-induced leaf spots on an apple cultivar that is resistant to cedar apple rust. Bookmark the permalink.