Department of Crop and Soil Sciences - Cooperative Extension
| Generic names | Contact (C) Localized systemic (LS)or Systemic (S) | Common trade names1 |
|---|---|---|
| Azoxystrobin | S | Heritage |
| Captan | C | Captan |
| Chloroneb | LS | Terraneb SP, Teremec SP, ProTurf Fungicide V |
| Chlorothalonil | C | Daconil, Manicure, Thalonil, Echo |
| Cyproconazole | S | Sentinel |
| Ethazole (Etridiazole) | C | Koban, Terrazole |
| Fenarimol | S | Rubigan |
| Fosetyl-Aluminum | S | Aliette, Prodigy |
| Flutolanil | S | ProStar |
| Iprodione | LS | Chipco 26019, ProTurf Fungicide X |
| Mancozeb | C | Fore, Dithane T/O, Protect T/O, 4 Flowable Mancozeb |
| Metalaxyl | S | Subdue, Apron (seed treatment only) |
| Mefenoxam | S | Subdue MAXX |
| Myclobutanil | S | Eagle |
| PCNB (Quintozene) | C | Cleary's PCNB, Revere, Penstar, Terraclor, Turfcide,Turfgo Engage |
| Propamocarb | S | Banol |
| Propiconazole | S | Banner MAXX |
| Thiophanate-methyl | S | Cleary's 3336, Fungo 50 |
| Triadimefon | S | Bayleton, ProTurf Fungicide VII, Granular TurfFungicide |
| Vinclozolin | LS | Vorlan, Curalan, Touche |
| Thiram | C | Spotrete-F, Thiram |
| Combination products | ||
| Fenarimol + Chlorothalonil | S + C | Twosome |
| Thiophanate-methyl + Chlorothalonil | S + C | ConSyst |
| Thiophanate-methyl + Mancozeb | S + C | Duosan |
| Thiophanate-methyl + Iprodione | S + LS | ProTurf Fluid Fungicide |
| Triadimefon + Metalaxyl | S + S | ProTurf Fluid Fungicide II |
| Triadimefon + Thiram | S + C | ProTurf Fluid Fungicide III |
| Metalaxyl + Mancozeb | S + C | Pace |
| 1Products may be availableonly through specialized dealers or only in large quantity. Someproducts can be purchased and applied only by licensed pesticideapplicators. This list is presented for information only. Noendorsement is intended for products mentioned, or is criticism meantfor products not mentioned. | ||
| Diseases and pathogens | Environmental management and resistant species/cultivars | Fungicides |
|---|---|---|
| Anthracnose (Colletotrichum graminicola) |
Provide adequate fertility (especially nitrogen), avoid excess irrigation, improve drainage, aerate to relieve compaction, and improve air circulation. Annual bluegrass and creeping bentgrass particularly susceptible. No resistant cultivars known. | Azoxystrobin Chlorothalonil Cyproconazole Fenarimol Propiconazole Thiophanate methyl Triadimefon |
| Brown patch (Rhizoctonia solani) |
Avoid excess nitrogen and irrigation in summer. Creeping bentgrass, perennial ryegrass, and tall fescue are the most susceptible. Kentucky bluegrass and fine fescues are the most resistant species. Resistant perennial ryegrass cultivars: Prizm, Affinity, APM, Morning Star, Bright Star, Prelude II, Assure, Wind Star, Riviera II, Mulligan, and Seville. |
Azoxystrobin Chlorothalonil Cyproconazole Fenarimol Flutolanil Iprodione Mancozeb Myclobutanil Propiconazole Thiophanate methyl Triadimefon Vinclozolin Thiram |
| Damping-off (species of Fusarium, Pythium, and Rhizoctonia) |
Avoid excessive seeding rates and excess nitrogen. Do not seed in summer unless absolutely necessary. Avoid overabundance of mulch. No resistant species/cultivars known. | Captan* Banol Ethazole (Koban) Metalaxyl* *also available as seed treatment |
| Dollar spot (Sclerotinia homoeocarpa) |
Avoid nitrogen deficiency, drought stress, and night watering. Remove dew in early morning. Creeping bentgrass, annual bluegrass and Kentucky bluegrass particularly susceptible. Tall fescue is quite resistant. Resistant creeping bentgrass cultivars: Penn A-1, PennG-2, L-93, Cato, and Providence. Resistant Kentucky bluegrass cultivars: Preakness,Princeton 104, NuStar, Unique, Banff, A-34, and Eagleton. |
Chlorothalonil Cyproconazole Fenarimol Iprodione Mancozeb Myclobutanil Propiconazole Thiophanate methyl Triadimefon Vinclozolin Thiram |
| Fairy rings (basidiomycete fungi) |
Mask symptoms by fertilizing with nitrogen and/oriron. Thoroughly water rings to avoid drought. Core aeration andapplication of wetting agents may help wetting of affected soils. Noresistant species/cultivars available. | Flutolanil |
| Gray snow mold (Typhula incarnata) |
Avoid piling snow in sensitive turfed areas. Removetree leaves from turf before snow cover. Rake disease damaged areas inspring to break up matted grass. Creeping bentgrass, perennialryegrass and tall fescue are very susceptible. In problem lawnssubstitute Kentucky bluegrass or fine fescues for perennial ryegrassor tall fescue. | Azoxystrobin Chloroneb Chlorothalonil Cyproconazole Ethazole Fenarimol Flutolanil Iprodione PCNB Propiconazole Triadimefon Thiram Vinclozolin |
| Leaf spot/melting out (Bipolaris, Drechlera, and Exserohilum spp.) |
Avoid excess use of nitrogen in early spring. Avoidusing common types of Kentucky bluegrass. Resistant Kentucky bluegrass cultivars: Ascot, Princeton104, Eclipse, Unique, Alpine, SR 2000, Bartita, Apex, Touchdown,Liberty, and Barblue. |
Azoxystrobin Chlorothalonil Iprodione Mancozeb Vinclozolin |
| Necrotic ring spot (Leptosphaeria korrae) |
Use cultural practices that reduce turf stress, suchas irrigation when turf undergoes drought stress and raising mowingheights to 2 inches or more. Overseed affected areas with perennialryegrass. Tall fescue is also resistant to necrotic ring spot. | Azoxystrobin Cyproconazole Fenarimol Iprodione Myclobutanil Propiconazole Thiophanate methyl |
| Pink snow mold/Fusarium patch (Microdochium nivale) |
Avoid piling snow in sensitive turfed areas.Continue mowing turf in fall until growth ceases. Do not applyexcessive amounts of nitrogen in mid-fall. Creeping bentgrass andperennial ryegrass are more susceptible than Kentucky bluegrass andfine fescues. | Azoxystrobin Cyproconazole Fenarimol Iprodione Mancozeb PCNB Propiconazole Thiophanate methyl Thiram Triadimefon Vinclozolin |
| Powdery mildew (Erysiphe graminis) |
Do not grow Kentucky bluegrass in shaded areas.Prune trees to allow more light to reach turf. Use fine fescues orshade-tolerant ground covers in shaded areas. | Cyproconazole Fenarimol Myclobutanil Propiconazole Triadimefon |
| Pythium blight (Pythium aphanidermatum) |
Avoid excessive nitrogen and irrigation in hot,humid weather. Improve drainage and air circulation in areas wherePythium blight is a problem. Perennial ryegrass and creeping bentgrassare particularly susceptible to Pythium blight. Kentucky bluegrass isless susceptible to this disease. | Azoxystrobin Chloroneb Ethazole Fosetyl-Aluminum Metalaxyl Mefenoxam Propamocarb |
| Red thread/Pink patch (Laetisaria/(Limonomyces fuciformis)/roseipellis) |
Avoid nitrogen deficiencies, especially on perennialryegrass and fine fescues. Although Kentucky bluegrass and tall fescueare susceptible to these diseases, the resulting disease damage isusually not as severe as with perennial rygrass and the fine fescues. Resistant perennial ryegrass cultivars: Regal, Legacy, Sherwood, Derby Supreme, Loretta, Gettysburg,Assure, and Pinnacle. |
Azoxystrobin* Chlorothalonil Cyproconazole Fenarimol Flutolanil Iprodione Mancozeb Myclobutanil Propiconazole Thiophanate methyl** Triadimefon Vinclozolin *Labeled only for red thread. **Controls only red thread. |
| Rust (Puccinia spp.) |
Avoid nitrogen deficiencies and moisture stress inlate summer/early fall. Applications of nitrogen fertilizer andirrigation at the first sign of infection will help reduce diseaseseverity. Perennial ryegrass and Kentucky bluegrass are verysusceptible. The fine fescues and tall fescue are quite resistant tomost foliar rust diseases. | Chlorothalonil Cyproconazole Fenarimol Mancozeb Myclobutanil Propiconazole Triadimefon |
| Slime molds (Mucilago, Physarum, Fuligo spp.) |
Remove spores by mowing, brushing, raking, orirrigating the turf. | Fungicides not required. |
| Summer patch (Magnaporthe poae) |
Employ cultural practices that promote root growth.Increase aeration and improve drainage on compacted and poorly-drainedsoils. Raise mowing heights of Kentucky bluegrass in summer if mowedbelow 2 inches in height. Kentucky bluegrass, annual bluegrass, andfine fescues are susceptible. Perennial ryegrass, tall fescue, andcreeping bentgrass are resistant. | Azoxystrobin Cyproconazole Fenarimol Myclobutanil Propiconazole Thiophanate methyl Triadimefon |
| Take-all patch (Gaeumannomyces graminis) |
Only a problem on bentgrasses. Use acidifying fertilizers or sulfur to lower thatch and soil pH. Avoid applicationsof lime where take-all patch is a problem. No resistant cultivars areknown. | Azoxystrobin Fenarimol Triadimefon |
| Yellow patch (Rhizoctonia cerealis) |
Improve surface drainage and avoid excessive applications of nitrogen. | Azoxystrobin Chlorothalonil Flutolanil Iprodione Mancozeb PCNB |
| Nematodes | Employ cultural practices that promote root growth.Increase aeration and improve drainage on compacted and poorly-drainedsoils. | Mocap* (Nematicide) Nemacur* (Nematicide) |
| *NOTE: Nematicides are restricted usepesticides. These are only used to control nematodes and not otherdiseases. | ||