| 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 | ||||||||
| Actinovate | low (BM 02) | 3 | NL | 2 | NL | NL | NL | NL | NL |
| B-Lock | low | NL | NL | NL | NL | NL | 5 | 3 | NR |
| Bio-Tam 2.0 | low (BM 02) | NL | NL | NL | NL | NL | 4 | 4 | 4 |
| Botector | low (BM 02) | NL | NL | 2 | ND | NL | NL | NL | NL |
| Cinnacure | low (BM 01) | 4 | NL | NL | NL | NL | NL | NL | NL |
| Double Nickel 55 | low (BM 02) | 2 | ND | 2 | ND | ND | ND | NL | NL |
| Elexa**, Armour-Zen | low (P-unspecified) |
NL (4) | NL | ND | NL | NL | NL | NL | NL |
| JMS Stylet oil3 | low | 4 | NL | 4 | 3 | NL | NL | NL | NL |
| Kaligreen | low (NC) | 4 | NL | NL | NL | NL | NL | NL | NL |
| Mevalone CS | low (BM 01) | NL (4) | ND | 3 | NL | NL | NL | NL | NL |
| Milstop | low (NC) | 4 | NL | NL | NL | NL | NL | NL | NL |
| Prev-am3 | low (NC) | 3 | ND | 3 | 2 | NL | 3 | NL | NL |
| ProBlad Verde | low (BM 01) | 4 | NL | 3 | NL | NL | NL | NL | NL |
| Procidic | low (BM 01) | ND | ND | ND | ND | NL | NL | NL | NL |
| Purespray | low | 4 | NL | NL | NL | NL | NL | NL | NL |
| Rango | low (BM 01) | ND | NL | ND | ND | NL | NL | NL | NL |
| Regalia | low (BM 01) | 4 | ND | 3 | 2 | NL | NL | NL | NL |
| Serenade | low (BM 02) | 4 | ND | 3 | 2 | 4 | 4 | NL (4) | ND |
| Sonata | low (BM 02) | 4 | ND | 3 | 2 | ND | ND | NL | NL |
| Sporan EC2 | low (BM 01) | 3 | ND | ND | NL | NL | NL | NL | NL |
| Sporatec | low (BM 01) | 2 | ND | ND | NL | NL | NL | NL | NL |
| Taegro 2 | low (BM 02) | 4 | ND | 3 | 2 | NL | NL | NL | NL |
| Timorex (Act, Gold)3 | low (BM 01) | 3 | ND | 3 | ND | NL | ND | NL | NL |
| Vintec4 | low (BM 02) | NL | NL | NL | NL | NL | 4 | 4 | 4 |
| Vitiseal | low (BM 01) | NL | NL | NL | NL | NL | 5 | NL | NL |
| 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| ** Not registered, label withdrawn or inactive in California. |
| 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 Phytotoxic if used within 2 weeks of Captan or sulfur. |
| 4 Labeled for Eutypa sp., Botryosphaeria sp., Cytospora sp., and other trunk diseases of grape. |
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)