| Fungicide** | Resistance risk (FRAC group number)1 |
Brown rot2,3 | Botrytis Blossom/Fruit |
Powdery mildew2 | Eutypa | |
|---|---|---|---|---|---|---|
| Blossom | Fruit | |||||
| Abound | high (11)5 | 4 | 2 | 0 | 3 | 0 |
| Adament* | high (3/11) | 5 | 5 | 3 | 3 | 4 |
| Botran | medium (14) | 3 | 3 | 4 | 0 | 0 |
| Bravo, Chlorothalonil, Echo, Equus9,10 | low (M5) | 3 | NL | 3 | 0 | 0 |
| Bumper, Tilt | high (3) | 5 | 5 | 0 | 4 | 4 |
| Cabrio | high (11)5 | 4 | 3 | 0 | 3 | 0 |
| Captan10 | low (M4) | 3 | 3 | 3 | 0 | 0 |
| Cevya | high (3) | 5 | 5 | 2 | 5 | ND |
| Copper | low (M1) | 1 | 0 | 0 | 0 | 0 |
| Elevate | high (17)5 | 4 | 4 | 5 | 2 | 0 |
| Flint Extra | high (11)5 | 4 | 3 | 0 | 3 | 0 |
| Fontelis4 | high (7) | 5 | 4 | 5 | 5 | 0 |
| Gatten | high (U13) | NL | NL | NL | 4 | 0 |
| Indar | high (3) | 5 | 4 | 0 | 4 | 0 |
| Inspire | high (3) | 5 | 5 | 3 | 4 | 0 |
| Kenja | high (7) | 5 | 4 | NL | NL | NL |
| Luna Experience | medium (3/7) | 5 | 5 | 4 | 5 | 0 |
| Luna Privilege | high (7) | 4 | 4 | 4 | 4 | 0 |
| Luna Sensation | medium (7/11)5 | 5 | 5 | 4 | 5 | 0 |
| Merivon | medium (7/11)5 | 5 | 5 | 4 | 4 | 0 |
| Miravis Duo | medium (3/7) | 5 | 5 | 4 | 5 | 0 |
| Orius, Teb, Toledo, Tebucon, Tebuconazole | high (3) | 5 | 5 | 3 | 3 | 3 |
| Ph-D, Oso | high (19) | 3 | 3 | 4 | 4 | 0 |
| Pristine | medium (7/11)5 | 5 | 5 | 4 | 4 | 0 |
| Procure8 | high (3) | 4 | 4 | 0 | 5 | 0 |
| Protocol4 | medium to high (1/3) | 5 | 5 | 3 | 4 | ND |
| Quadris Top | medium (3/11) | 5 | 5 | 3 | 4 | 0 |
| Quash | high (3) | 5 | 5 | 3 | 4 | 0 |
| Quilt Xcel, Avaris 2XS, | medium (3/11) | 5 | 5 | 3 | 4 | 0 |
| Quintec | high (13) | NL | NL | NL | 5 | 0 |
| Rally8 | high (3) | 4 | 4 | 0 | 5 | 4 |
| Rhyme | high (3) | 4 | 4 | 0 | 5 | ND |
| Rovral, Iprodione, Nevado6 | low (2) | 4 | NL | 4 | 0 | 0 |
| Rovral6+ oil7 | low (2) | 5 | NL | 5 | 3 | 0 |
| Rubigan*, Vintage* | high (3) | 4 | 4 | 0 | 5 | 0 |
| Sulfur10 | low (M2) | 1 | 0 | 0 | 4 | 0 |
| Topsin-M, T-Methyl, Incognito, Cercobin4 | high (1)5 | 5 | NL | 5 | 4 | 53 |
| Viathon | med. (3/33, P07) | 5 | 5 | 3 | 3 | 3 |
| Vitiseal | low (?) | 0 | 0 | 0 | 0 | 5 |
| Vivando | high (50) | NL | NL | NL | 5 | 0 |
| Ziram | low (M3) | 1 | NL | 0 | 0 | 0 |
| Rating: 5 = excellent and consistent, 4 = good and reliable, 3 = moderate and variable, 2 = limited and/or erratic, 1 = minimal and often ineffective, 0 = ineffective, NL = not on label, and ND = no data. |
| * Not registered, label withdrawn or inactive in California. |
| ** Postharvest fruit registrations in California include: BioSpectra/CeraFruta/Uniguard, Chairman, Mentor, Penbotec/Pyrimethanil, and Scholar/FDL. |
| 1 Group numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of action. Fungicides with different group numbers are suitable to alternate in a resistance management program. In California, make no more than one application of a fungicide with a mode-of-action group number associated with high resistance risk before rotating to a fungicide with a different mode-of-action group number; for other fungicides, make no more than two consecutive applications before rotating to fungicide with a different mode-of-action group number. |
| 2 Do not use the same fungicide or fungicides with similar chemistry more than twice in one year. |
| 3 Shot hole and leaf spot occur infrequently on cherry in California; control usually is not necessary. |
| 4 Strains of Monilinia fructicola resistant to Topsin-M and T-Methyl are present in some California cherry orchards. Resistant strains of the jacket rot fungus, Botrytis cinerea, and powdery mildew fungi have been reported in California on crops other than almond and stone fruits and may have the potential to develop in sweet cherry with overuse of fungicides with similar chemistry. |
| 5 To reduce the risk of resistance development, start treatments with a fungicide with a multi-site mode of action; rotate or mix fungicides with different mode of action FRAC numbers for subsequent applications, use labeled rates (preferably the upper range), and limit the total number of applications per season. |
| 6 Blossom blight only; not registered for use after petal fall |
| 7 Oil to use is a "light" summer oil, 1 to 2% volume/volume. |
| 8 More effective when applied as a concentrate (80–100 gal/acre) than as a dilute spray. |
| 9 Do not use after jacket (shuck) split. |
| 10 Do not use in combination with or shortly before or after oil treatment. |
Acknowledgment: Adaskaveg et al., 2022. Fungicides, Bactericides, Biocontrols, and Natural Products for Deciduous Tree Fruit and Nut, Citrus, Strawberry, and Vine Crops in California. (PDF)