Agriculture: Grape Pest Management Guidelines

Fungicide Efficacy—Conventional Products

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)

Text Updated: 03/22