Species of fungus
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Puccinia malvacearum, also known as hollyhock or mallow rust, is a fungal species within the genus "Puccinia" known for attacking members of the family Malvaceae. An autoecious pathogen, it can complete its life cycle using a single host.
It was originally found on the leaves of a species of "Malva" in Chile.
Other plants also affected by the rust include "Abutilon", "Alcea" (Hollyhock), "Hibiscus", "Lavatera", "Malvastrum" and "Sphaeralcea".
Suggested control measures (in the US), include sanitation (removal or destruction of affected plants or plant portions) or treatment with fungicides.
References.
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