| Fungicide*** | Resistance risk (FRAC group number)1,5 |
Phytophthora2 | Septoria spot | Anthracnose | Alternaria rot | Greasy spot | Rind disorder | |
|---|---|---|---|---|---|---|---|---|
| brown rot | root rot | |||||||
| Abound | high (11)5 | NL | 0 | 4 | 4 | 2 | 4 | 0 |
| Aliette, ProPhyt, Fungi-Phite, K-Phite | low to medium (P07, 33) | 4 | 4 | 3 | 3 | 1 | ND | 0 |
| Bumper, Tilt3 | high (3) | 0 | 0 | NL | NL | NL | 4 | 0 |
| Copper | low (M1) | 4 | 0 | 4 | 3 | 1 | 3 | 0 |
| Enable | high (3) | 0 | 0 | NL | NL | 1 | 4 | 0 |
| Ferbam** | low (M3) | NL | NL | 0 | 3 | 0 | 0 | 0 |
| Flint Extra | high (11)5 | NL | 0 | 4 | 4 | 2 | 4 | 0 |
| Headline | high (11)5 | NL | 0 | 4 | 4 | 2 | 4 | 0 |
| Luna Sensation | medium (7/11)5 | NL | 0 | 5 | 5 | 2 | 4 | 0 |
| Mibelya* | medium (3/7)5 | NL | 0 | 5 | 5 | 2 | 4 | 0 |
| Miravis Prime**4 | medium (7/12) | 0 | 0 | 5 | 5 | 2 | 4 | 0 |
| Orondis | high (49) | 5 | 5 | 0 | 0 | 0 | 0 | 0 |
| Ph-D, Oso | high (19) | NL | NL | 4 | 4 | 1 | 0 | 0 |
| Presidio | high (43) | NL | 5 | 0 | 0 | 0 | 0 | 0 |
| Priaxor | medium (7/11)5 | NL | 0 | 5 | 5 | 2 | 4 | 0 |
| Pristine | medium (7/11)5 | NL | 0 | 4 | 4 | 2 | 4 | 0 |
| Quadris Top | medium (3/11) | NL | 0 | 5 | 5 | 3 | 4 | 0 |
| Revus | high (40) | 5 | NL | 0 | 0 | 0 | 0 | 0 |
| Ridomil Gold, Mefenoxam | high (4) | NL | 3 | 0 | 0 | 0 | 0 | 0 |
| Ridomil, Metalaxyl | high (4) | NL | 3 | 0 | 0 | 0 | 0 | 0 |
| Scala4 | high (9) | 0 | 0 | NL | NL | 1 | NL | 0 |
| Sulfur | low (M2) | 0 | 0 | 0 | 0 | 0 | 3 | 0 |
| Switch4 | medium (9/12) | 0 | 0 | 5 | 5 | 2 | 4 | 0 |
| Vapor Gard | anti-transpirant | 0 | 0 | 0 | 0 | 0 | 0 | 5 |
| 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. |
| * Registration pending in California. |
| ** Not registered, label withdrawn or inactive in California. |
| *** Postharvest fruit registrations in California include: BioSpectra/Cerafruta/Uniguard, Imazalil/Deccocil/Fungaflor, Graduate/FDL, GraduateA+, Azoxy, Mentor, Penbotec/Pyrimethanil, and Alumni/Decco Salt No. 19/TBZ. |
| 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 Only for non-bearing citrus. |
| 4 Only federally registered on lemons and/or limes (check label). |
| 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. |
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)