Table 1. Rust Diseases To Be Aware of in Illinois Rust disease and life cycle Hosts Occurrence in Internet references* Illinois Orange rust of brambles, caused by Raspberries and blackberries Common RPD 708 Arthuriomyces peckianus and Gymnoconia (http://web.aces.uiuc.edu/vista/ nitens (autoecious and demicyclic) pdf_pubs/708.pdf) Pine-oak gall rust (also known as eastern Oak (chinkapin, bur, pin, red, Rare http://www.forestpests.org/ gall rust), caused by Cronartium quercuum and others) (urediniospores subject.html?SUB=727 (heteroecious and macrocyclic) produced on these hosts) Pine (Austrian, jack, mugo, Rare ponderosa, red, Scotch, others) White pine blister rust, caused by Cronarti- Current and gooseberry (Ribes Rare http://www.forestpests.org/ um ribicola (heteroecious and macrocyclic) spp.) (urediniospores pro- subject.html?SUB=722 duced on these hosts) White pine Rare Pine-pine gall rust (also known as western Pine (scotch, Austrian, mugo, Rare http://www.forestpests.org/ gall rust), caused by Endocronartium jack, others) subject.html?SUB=723 harknessii (autoecious and endocyclic) Cedar-apple, hawthorn, and quince rusts, Juniper Common RPD 802 caused by Gymnosporangium spp. (http://web.aces.uiuc.edu/vista/ (heteroecious and demicyclic) Apple and crabapple Common pdf_pubs/802.pdf) Hawthorne Common Conifer-poplar rusts, caused by Poplar, aspen, and cottonwood Infrequent RPD 605 Melampsora medusae and M. abietis- (Populus spp.) (urediniospores (http://web.aces.uiuc.edu/vista/ canadensis (heteroecious and produced on these hosts) pdf_pubs/605.pdf) macrocyclic) Larch, Douglas-fir, hemlock, Rare and ponderosa pine Soybean rust, caused by Phakopsora Soybean and other legumi- Not reported in http://soyrust.cropsci.uiuc.edu/ pachyrhizi and P. meibomiae (apparently nous plants, including yellow Illinois; of regula- autoecious; only the urediniospores are sweet clover (Melilotus tory concern across http://www.usda.gov/soybeanrust/ known to be functional) officinalis), vetch (Vicia the U.S. dasycarpa), medic (Medicago arborea), lupine (Lupinus hirsutus), green and kidney bean (Phaseolus vulgaris), lima and butter bean (Phaseolus lunatus), and kudzu (Pueraria lobata) Rusts of turfgrass, primarily caused by Turfgrass (urediniospores Common RPD 412 many Puccinia spp. (heteroecious and produced on these hosts) (http://web.aces.uiuc.edu/vista/ macrocyclic) pdf_pubs/412.pdf) Wide range of woody shrubs Infrequent and herbaceous ornamental plants Snapdragon rust, caused by Puccinia Snapdragon (Antirrhinum spp.) Common RPD 635 antirrhini (apparently autoecious; (urediniospores produced on (http://web.aces.uiuc.edu/vista/ spermogonial and aecial stages are this host) pdf_pubs/635.pdf) unknown) Asparagus rust, caused by Puccinia Asparagus Common RPD 934 asparagi (autoecious and macrocyclic) (http://web.aces.uiuc.edu/vista/ pdf_pubs/934.pdf) Crown rust, caused by Puccinia coronata Oats (urediniospores produced Infrequent (host is RPD 109 (heteroecious and macrocyclic) on this host) not widely planted) (http://web.aces.uiuc.edu/vista/ pdf_pubs/109.pdf) Buckthorn (Rhamnus spp.) Rare to infrequent Stem rust caused by Puccinia graminis Wheat, oats, barley and rye Infrequent RPD 108 (heteroecious and macrocyclic) (urediniospores produced on (http://web.aces.uiuc.edu/vista/ these hosts) pdf_pubs/108.pdf) Barberry (Berberis spp.) Rare http://www.cdl.umn.edu/barberry/ barb-tst.html Sunflower rust, caused by Puccinia Sunflower Infrequent (host is http://www.ext.nodak.edu/extpubs/ helianthi (autoecious and macrocyclic) not widely planted) plantsci/rowcrops/pp998.pdf Daylily rust, caused by Puccinia hemero- Daylily (Hemerocallis spp.) Rare, but becoming http://www.nationalplantboard. callidis (heteroecious and macrocyclic) (urediniospores produced on common org/daylily.html this host) Patrinia Not reported in the U.S. White rust of chrysanthemum, caused by Chrysanthemum Rare; of regulatory http://www.ceris.purdue.edu/ Puccinia horiana (autoecious and micro- concern across the napis/pests/cwr/cwryod1.html cyclic; spermogonial, aecial, and uredinial U.S. stages are unknown) http://extension.usu.edu/ plantpath/exoticpests/ chrysanthemum_white_rust.pdf Hollyhock rust, caused by Puccinia malva- Hollyhock (Alcea spp.) Common RPD 627 cearum (autoecious and produces only (http://web.aces.uiuc.edu/vista/ teliospores) pdf_pubs/627.pdf) Geranium rust, caused by Puccinia Geranium (Pelargonium x hor- Infrequent and only RPD 658 pelargonii-zonalis (autoecious and torum) (urediniospores pro- in greenhouses (http://web.aces.uiuc.edu/vista/ produces only urediniospores) duced on this host) pdf_pubs/658.pdf) Common rust, caused by Puccinia sorghi, Corn (all types) (uredinio- Common (P. poly- RPD 965 and southern rust, caused by Puccinia spores produced on this host) sora is infrequent) (http://web.aces.uiuc.edu/vista/ polysora (heteroecious and macrocyclic) pdf_pubs/965.pdf). Wood sorrel (Oxalis spp.) is Rare the alternate host for the com- mon rust fungus; its role out- side of Mexico is apparently not important. No alternate host is known for southern rust. Ash rust, caused by Puccinia Cordgrass (Spartina) (uredinio- Rare to infrequent http://www.forestpests.org/ash/ sparganioides (heteroecious and spores produced on this host) ashrust.html macrocyclic) Ash Rare to infrequent Stripe rust caused by Puccinia striiformis Wheat, barley, and rye Common http://www.oznet.ksu.edu/path-ext/ (autoecious and only known to produce (urediniospores produced on factSheets/wheat/wheat%20stripe urediniospores and teliospores) these hosts) %20rust.asp Leaf rust caused by Puccinia triticina, P. Wheat, barley, and rye Common RPD 104 hordei, and P. recondita (heteroecious and (urediniospores produced on http://web.aces.uiuc.edu/vista/ macrocyclic) these hosts) pdf_pubs/104.pdf Species of Thalictrum, Not reported in the Anchusa, Anemonella, north-central U.S. Clematis, and Isopyrum Hemlock-hydrangea rust, caused by Hydrangea (Urediniospores Rare http://woodypestguide.cas.psu.edu/ Pucciniastrum hydrangeae (heteroecious produced on this host) Diseases/Hydrangea.html and macrocyclic) Hemlock Rare Rust of dry beans, caused by Uromyces Dry beans (Phaseolus Rare to infrequent http://ianrpubs.unl.edu/ appendiculatus (autoecious and vulgaris) plantdisease/g1250.htm macrocyclic) Alfalfa rust, caused by Uromyces striatus Alfalfa (Urediniospores pro- Rare to infrequent http://www.ipm.uiuc.edu/diseases/ (heteroecious and macrocyclic) duced on this host) series300/rpd301/ Cypress spurge and leafy Not reported in the spurge (Euphorbia spp.) U.S. *RPD refers to publications in the Report on Plant Disease series, available online at the VISTA site..