| Fungicide | Resistance risk (FRAC group number)1 |
Powdery mildew | Downy mildew | Rot | Phomopsis cane and leaf spot | Eutypa dieback | Bot Canker | Phomopsis dieback | |
|---|---|---|---|---|---|---|---|---|---|
| Botrytis bunch rot | Summer rot | ||||||||
| Abound | high (11) | 5 | 5 | 2 | 0 | 4 | NL | 0 | 0 |
| Adament** | high (3/11) | 5 | 0 | 3 | 3 | 0 | NL | 0 | 0 |
| Aprovia | medium (7) | 5 | 0 | 3 | 0 | 3 | NL | NL | NL |
| Aprovia Top | medium (3/7) | 5 | 0 | 4 | 3 | 4 | NL | NL | NL |
| Bayleton** | high (3) | 3 | 0 | 0 | 0 | 0 | NL | 0 | 0 |
| Botran | medium (14) | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 |
| Captan | low (M4) | 0 | 2 | 4 | 4 | 4 | NL | 0 | 0 |
| Cevya7 | high (3) | 5 | 0 | NL | NL | 4 | NL | NL | NL |
| Copper | low (M1) | 3 | 4 | 3 | 4 | 0 | 0 | 0 | 0 |
| Dithane, Manzate, Penncozeb | low (M3) | 0 | 0 | 3 | 0 | 4 | 0 | 0 | 0 |
| Elevate | high (17) 2 | 3 | 0 | 5 | 3 | 0 | NL | 0 | 0 |
| Fervent | medium (3/7) | 5 | 0 | 5 | 3 | 0 | NL | NL | NL |
| Flint Extra3 | high (11)2 | 5 | 4 | 3 | 3 | 3 | NL | 0 | 0 |
| Gatten | high? (U13) | 4 | NL | NL | NL | NL | NL | NL | NL |
| Inspire Super | medium (3/9) | 5 | 0 | 5 | 3 | 0 | NL | NL | NL |
| Intuity | high (11) | 3 | NL | 4 | 3 | NL | NL | NL | NL |
| Kenja | high (7) | 5 | NL | 5 | NL | NL | NL | NL | NL |
| Laguna | high (3) | ND | ND | ND | ND | ND | ND | ND | ND |
| Luna Experience | medium (3/7) | 5 | 0 | 5 | 3 | 0 | NL | NL | NL |
| Luna Privilege, Velum One | high (7) | 4 | 0 | 4 | 2 | 0 | 3 | 0 | 0 |
| Luna Sensation | medium (7/11) | 5 | 0 | 5 | 3 | 0 | NL | NL | NL |
| Merivon*** | medium (7/11) | 5 | 0 | 5 | 4 | 4 | NL | NL | NL |
| Mettle | high (3) | 5 | 0 | 0 | 2 | 0 | 4 | 0 | 0 |
| Miravis Prime | medium (7/12) | 5 | 0 | 5 | 4 | 4 | NL | NL | NL |
| Orius, Tebucon, Toledo, Elite** | high (3) | 5 | 0 | 3 | 3 | 0 | NL | 0 | 0 |
| Oso | medium (19) | NL | 0 | 4 | 4 | ND | NL | 0 | 0 |
| Ph-D, Oso | medium (19) | 3 | 0 | 4 | 4 | ND | NL | 0 | 0 |
| Presidio* | high (43) | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 |
| Pristine | medium (7/11)2 | 5 | 5 | 5 | 4 | 3 | NL | 0 | 0 |
| Procure, Viticure | high (3) | 5 | 0 | 0 | 0 | 0 | NL | 0 | 0 |
| Prolivo | high (50) | 4 | NL | NL | NL | NL | NL | NL | NL |
| Quadris Top | high (3/11) | 5 | 2 | 3 | 3 | 3 | NL | 0 | 0 |
| Quintec | high (13) | 5 | 0 | 0 | 0 | 0 | NL | 0 | 0 |
| Rally | high (3) | 5 | 0 | 0 | 0 | 0 | 4 | 3 | 3 |
| Rally+Topsin-M5 | high (1+3) | 5 | 0 | 0 | 0 | 5 | 56 | 5 | 5 |
| Ranman | high (21) | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 |
| Revus | high (40) | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 |
| Revus Top | medium (3/40) | 5 | 5 | 3 | 3 | 3 | NL | 0 | 0 |
| Rhyme | high (3) | 5 | 0 | 0 | 0 | 0 | NL | 0 | 0 |
| Ridomil Gold/Copper | high (4/M1) | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rovral + Oil4 | low (2) | NL | 0 | 5 | 0 | 0 | NL | 0 | 0 |
| Rovral, Iprodione, Nevado | low (2) | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 |
| Rubigan**, Vintage** | high (3) | 5 | 0 | 0 | 0 | 0 | NL | 0 | 0 |
| Scala | high (9)2 | 3 | 0 | 5 | 3 | 0 | NL | 0 | 0 |
| Sovran | high (11)2 | 5 | 5 | 3 | 3 | 4 | 0 | NL | 5 |
| Sulfur | low (M2) | 5 | 0 | 0 | 0 | 0 | NL | 0 | 0 |
| Switch | low (9/12) | 3 | 0 | 5 | 4 | 0 | 0 | 0 | 0 |
| Topsin-M, T-Methyl, Incognito | high (1)2 | 5 | 0 | 3 | 3 | 2 | 5 | 5 | 3 |
| Torino | high (U6) | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Vangard | high (9)2 | 3 | 0 | 5 | 3 | 0 | NL | 0 | 0 |
| Viathon | med. (3/33, P07) | 5 | 0 | 3 | 3 | 0 | NL | 0 | 0 |
| Vivando | high (50) | 4 | NL | NL | NL | NL | NL | NL | NL |
| Ziram | low (M3) | 0 | 3 | 2 | 2 | 4 | 0 | 0 | 4 |
| 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. |
| *** Registered only on wine/raison grapes in California. |
| 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 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. |
| 3 Causes severe phytotoxicity on Concord grape. |
| 4 Phytotoxic if used within 2 weeks of Captan or sulfur. |
| 5 Tank mixture applied post-pruning (dormant or delayed dormant). |
| 6 Apply at two-week intervals during rain events. |
| 7 Different use restrictions for ‘Table and Raisin’ and ‘Wine’ grape. Please read the label carefully. |
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)