| Common name (trade name) |
Chemical class | Activity | Mode of action group no.1 |
Resistance potential |
|---|---|---|---|---|
| azoxystrobin (Quadris) | QoI2 | systemic | 11 (single-site) | high |
| carboxin (Vitavax) | carboxamide | systemic (local) | 7 (multi-site) | low |
| difenoconazole (Dividend) | DMI3-triazole | systemic (local) | 3 (single-site) | high |
| mancozeb (Dithane) | carbamate (EBDC)4 | contact | M2 (multi-site) | low |
| PCNB | aromatic hydrocarbon | systemic (slight) | 14 (single-site) | high |
| propiconazole (Tilt) | DMI3-triazole | systemic (local) | 3 (single-site) | high |
| pyraclostrobin (Headline) | QoI2 | systemic | 11 (single-site) | high |
| tebuconazole (Raxil) | DMI3-triazole | systemic (local) | 3 (single-site) | high |
| thiram | dithiocarbamates | — | M2 (multi-site) | low |
| triadimenol (Baytan) | DMI3-triazole | systemic (local) | 3 (single-site) | high |
| trifloxystrobin/ propicanazole (Stratego) | QoI2/DMI3-triazole | systemic | 11/3 (multi/single-site) | high |
| 1 | Group numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of action. Fungicides with a different group number are suitable to alternate in a resistance management program. In California, make no more than one application of fungicides with mode of action Group numbers 1,4,9,11, or 17 before rotating to a fungicide with a different mode of action Group number; for fungicides with other Group numbers, make no more than two consecutive applications before rotating to a fungicide with a different mode of action Group number. | ||||
| 2 | QoI = quinone outside inhibitor (strobilurin) | ||||
| 3 | DMI = demethylation (sterol) inhibitor | ||||
| 4 | EBDC = ethylene bisdithiocarbamate | ||||
| — | = unknown | ||||
Acknowledgment: This information was adapted from the Fungicide Resistance Action Committee website.