Alcea "Alcea" species are used as food plants by the larvae of some Lepidoptera species including "Bucculatrix quadrigemina" and "Vanessa cardui", the painted lady. The mallow flea beetle ("Podagrica fuscicornis") is a pest that makes tiny holes in the leaves. Cutworms, aphids, and capsid bugs use the plant as a food source in hotter and drier conditions. A number of weevils use "A. rosea" as their host plant, including "Rhopalapion longirostre", "Alocentron curvirostre", and "Aspidapion validum". The plants are also susceptible to the pathogenic fungus "Puccinia malvacearum", the hollyhock rust. A hollyhock flower, known in Japan as , was incorporated into
San Francisco Flower & Garden Show Garden Show in northern California were the Oakland Spring Flower Show which was produced by the California Association of Nurserymen from 1930 to 1978 (with a three-year hiatus from 1943 to 1945 because of World War II). In the early 1980s the rock ‘n roll impresario Bill Graham produced two annual flower shows at the Cow Palace. The show as it appears today was started in 1986 as the San Francisco Landscape Garden Show by volunteers for the Friends of Recreation and Parks in San Francisco as a fundraiser for that organization (in 2006 the organization’s name changed to San