Hollyhock rust (Puccinia malvacearum) is a parasitic fungus that produces a rust disease on the foliage of host plants such as hollyhocks and mallows. Hollyhock rust grows on the leaves, creating small brown spots on the undersides, then bright yellow or orange pustules on the tops. A severe infection can impair photosynthesis in the host plant. Its spores spread on the wind.
In This Article
Attributes
Similar Species
Tips for Finding
Clean and Preserve
Common Questions
General Info About Hollyhock rust
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Hollyhock rust is a pathogen fungus that can be found on the foliage of the species in the Malvaceae family, mostly Malva, Alcea, Althaea, and Lavatera. It develops on the upper side of the leaves, in the form of textured, yellow-orange spots and lumps.
