Puccinia coronata
species of fungus
Puccinia coronata is a plant pathogen and causal agent of oat and barley crown rust. The pathogen occurs worldwide, infecting both wild and cultivated oats. Crown rust poses a threat to barley production, because the first infections in barley occur early in the season from local inoculum. In oats, damage fluctuates per year, and may be trivial in damage some years or may account for over 30% of crop damage other years. Crown rusts have evolved many different physiological races within different species in response to host resistance. Each pathogenic race can attack a specific line of plants within the species typical host. For example, there are over 290 races of P. coronata. Crops with resistant phenotypes are often released, but within a few years virulent races have arisen and P. coronata can infect them..
Symptoms
Uredinia are responsible for the actual damage and are powdery, light orange, linear, and occur mostly on the leaf blades but occasionally occur also on leaf sheaths, peduncles
and awns. Extensive chlorosis is often associated with the uredinia.
The public source identifies “Puccinia coronata” as species of fungus. This brief keeps that definition visible, then builds a research path around Puccinia, coronata and species.
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A short description can identify a subject without explaining its stakes. For “Puccinia coronata”, the useful work is to connect “species of fungus” to the records capable of establishing context and consequence.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Sep 20, 2026. The linked authority identifier is Q1310367. None of the 0 selected statements returned an explicit reference.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Puccinia coronata” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.