Rust (fungus)
Rusts are plant diseases caused by pathogenic fungi of the order Pucciniales (previously also known as Uredinales). About 7800 species are known. Rusts can affect a variety of plants; leaves, stems, fruits and seeds. Rust is most commonly seen as coloured powder, composed off tiny aeciospores which land on vegetation producing pustules, or uredia, that form on the lower surfaces. During late spring or early summer, yellow orange or brown, hairlike or ligulate structures called telia grow on the leaves or emerge from bark of woody hosts such as Juniperus species. These telia produce teliospores which will germinate into aerial basidiospores, spreading and causing further infection.
Read more about Rust (fungus): Taxonomy, Spores, Life Cycle, Infection Process, Common Rust Fungi in Agriculture, Management of Rust Fungi Diseases
Famous quotes containing the word rust:
“How dull it is to pause, to make and end,
To rust unburnished, not to shine in use!
As though to breathe were life!”
—Alfred Tennyson (1809–1892)