A fungal disease of Westerwold ryegrass caused by the pathogen Puccinia coronata f. sp. lolii. It manifests as yellow-orange pustules on leaves, reducing the nutritional value and yield of the crop.
In the reference
32
varieties
crop Westerwolds Ryegrass,
where this is mentioned in the description.
The causative agent of the disease is the fungus Puccinia coronata, which infects leaf blades, covering them with numerous sporulating pustules. The development of rust on Westerwold ryegrass is often triggered by environmental stressors, such as drought or nitrogen deficiency.
Breeding for resistance to this disease relies primarily on quantitative trait loci (QTL) mapping and the selection of resistant genotypes, as specific resistance genes for this variety have not been identified. There is a trend where tetraploid varieties of Westerwold ryegrass exhibit higher resistance to crown rust compared to diploid forms.
General information about the subject — on the page
Rust.
Varieties of Westerwolds Ryegrass mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.