rust fungus
Definition
Noun: A parasitic fungus belonging to the order Pucciniales (formerly Uredinales) that causes plant diseases characterized by reddish-brown or yellowish pustules on stems and leaves. These fungi are obligate parasites, requiring a living host plant to complete their life cycle.
Usage
The term "rust fungus" is used to refer to the specific pathogen causing a rust disease. It is a standard term in plant pathology and agriculture. - The wheat crop was severely damaged by a rust fungus. - Scientists are studying the life cycle of the rust fungus that affects coffee plants.
Advanced Usage
- "Rust fungus" as a collective term: While often used for a single species, it can also refer to the entire taxonomic group.
- Control of rust fungus is a major challenge for organic farmers.
Variants and Related Words
- Rust (noun): The plant disease itself, caused by a rust fungus.
- The apple trees have cedar-apple rust.
- Rusts (noun, plural): A common way to refer to multiple types or instances of these fungi or diseases.
- Cereal rusts are a global threat to food security.
Synonyms
- Rust pathogen: A more technical synonym emphasizing its disease-causing nature.
- Puccinia (noun): The name of a very large and economically important genus within the rust fungi. (Note: This is a specific genus name, not a direct synonym for all rust fungi).
Related Phrases
- Rust disease: The condition caused by the fungus.
- The farm is battling an outbreak of rust disease.
- Rust infection: The process or state of being infected by the fungus.
- Early signs of rust infection include small yellow spots on leaves.
Noun
-
any of various fungi causing rust disease in plants
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