| Common name (Example trade name) | Chemical class | Activity | Mode of Action (FRAC #)1 | Resistance potential |
|---|---|---|---|---|
| azoxystrobin (Azoxystar) | QoI2 | contact, systemic | single-site (11) | high |
| copper | inorganic | contact | multi-site (M1) | low |
| penthiopyrad (Fontelis)± | SDHI3 | systemic (local) | single-site (7) | high |
| potassium bicarbonate (Kaligreen) | inorganic salt | contact | various (NC) | low |
| 1 | Group numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of actions. Fungicides with a different group number are suitable to alternate in a resistance management program. For fungicides with mode-of-action group numbers 1, 4, 9, 11, or 17, make no more than one application 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 fungicide with a different mode-of-action group number. |
| 2 | QoI = Quinone outside Inhibitor (strobilurin) |
| 3 | SDHI = succinate dehydrogenase inhibitor |
| ± | Registered on parsley, not on cilantro. |
Acknowledgment: This information was adapted from the Fungicide Resistance Action Committee website.