Agriculture: Grape Pest Management Guidelines

Fungicide Efficacy for Grape Diseases

Conventional Chemistry

Fungicide Resistance risk (FRAC#)1 Powdery mildew Downy mildew Rot Phomopsis cane and leaf spot Eutypa dieback Bot Canker Dead Arm (Phomopsis sp.)
Botrytis bunch rot Summer rot
Abound high (11)2 ++++ ++++ + ---- +++ NR ---- ----
Flint3 high (11)2 ++++ +++ ++ ++ ++ NR ---- ----
Inspire Super medium (3/9) ++++ ---- ++++ ++ ---- NR NR NR
Kenja high (7) ++++ NR NR NR NR NR NR NR
Luna Experience medium (3/7) ++++ ---- ++++ ++ ---- NR NR NR
Luna Tranquility** medium (7/9) ++++ ---- +++ ++ ---- NR NR NR
Merivon (wine+raisin) medium (7/11) ++++ ---- ++++ ++ ---- NR NR NR
Mettle high (3) ++++ ---- ---- + ---- +++ ---- ----
Orius, Tebucon, Toledo, Tebuconazole, Elite, (Tebuzol)** high (3) ++++ ---- ++ ++ ---- NR ---- ----
Pristine medium (7/11)2 ++++ ++++ ++++ +++ +++ NR ---- ----
Procure high (3) ++++ ---- ---- ---- ---- NR ---- ----
Quadris Top high (3/11) ++++ + ++ ++ ++ NR ---- ----
Quintec high (13) ++++ ---- ---- ---- ---- NR ---- ----
Rally high (3) ++++ ---- ---- ---- ---- +++ ++ ++
Rally+Topsin-M5 high (1+3) ++++ ---- ---- ---- ++++ ++++6 ++++ ++++
Revus Top medium (3/40) ++++ ++++ ++ ++ ++ NR ---- ----
Rhyme high (3) ++++ ---- ---- ---- ---- NR ---- ----
Rubigan**, Vintage** high (3) ++++ ---- ---- ---- ---- NR ---- ----
Sovran high (11)2 ++++ ++++ ++ ++ ++++ ---- NR ++++
Sulfur low (M2) ++++ ---- ---- ---- ---- NR ---- ----
Topsin-M, T-Methyl, Incognito high (1)2 ++++ ---- ++ ++ + ++++ ++++ ++
Torino high (U6) ++++ ---- ---- ---- ---- ---- ---- ----
Vivando high (U8) ++++ ---- ---- ---- ---- ---- ---- ----
Luna Privilege High (7) +++ ---- +++ + ---- ++ ---- ----
Bayleton** high (3) ++ ---- ---- ---- ---- NR ---- ----
Copper low (M1) ++ +++ ++ +++ ---- ---- ---- ----
Elevate high (17) 2 ++ ---- ++++ ++ ---- NR ---- ----
Ph-D medium (19) ++ ---- +++ +++ ND NR ---- ----
Scala high (9)2 ++ ---- ++++ ++ ---- NR ---- ----
Switch low (9/12) ++ ---- ++++ +++ ---- ---- ---- ----
Vangard high (9)2 ++ ---- ++++ ++ ---- NR ---- ----
Botran medium (14) ---- ---- +++ ---- ---- ---- ---- ----
Captan low (M4) ---- + +++ +++ +++ NR ---- ----
CaptEvate** low (M4/17) ---- + +++ +++ + ---- ---- ----
Dithane, Manzate, Penncozeb low (M3) ---- ---- ++ ---- +++ ---- ---- ----
Presidio** high (43) ---- ++++ ---- ---- ---- ---- ---- ----
Revus high (40) ---- ++++ ---- ---- ---- ---- ---- ----
Ridomil Gold, (Mefenoxam**) high (4) ---- ++++ ---- ---- ---- ---- ---- ----
Rovral, Iprodione, Nevado low (2) ---- ---- +++ ---- ---- ---- ---- ----
Ziram low (M3) ---- ++ + + +++ ---- ---- +++
Laguna high (3) ND ND ND ND ND ND ND ND
Aprovia* medium (7/11)2 NR NR NR NR NR NR NR NR
Rovral + Oil4 low (2) NR ---- ++++ ---- ---- NR ---- ----
Oso medium (19) NR ---- +++ +++ ND NR ---- ----
Rating: ++++ = excellent and consistent, +++ = good and reliable, ++ = moderate and variable, + = limited and/or erratic, +/- = minimal and often ineffective, ---- = ineffective; ND = no data and NR = not recommended.
* Registration pending in California.
** Not registered, label withdrawn or inactive in California.
*** Registered only on wine grapes in California.

Soft Chemistry (Biological and Natural Products)

Fungicide Resistance risk (FRAC#)1 Powdery mildew Downy mildew Bunch rot Phomopsis cane and leaf spot Eutypa dieback Bot Canker Dead Arm (Phomopsis sp.)
Botrytis Summer
Cinnacure low +++ ---- ---- ---- ---- ---- ---- ----
Elexa** low +++ ---- ---- ---- ---- ---- ---- ----
Fracture low +++ ---- ++ ---- ---- ---- ---- ----
JMS Stylet oil4 low +++ ---- +++ ++ ---- NR ---- ----
Kaligreen low +++ ---- ---- ---- ---- ---- ---- ----
Milstop low +++ ---- ---- ---- ---- ---- ---- ----
Purespray low +++ ---- ---- ---- ---- ---- ---- ----
Regalia low +++ ----- ---- ---- ---- ----- ---- ----
Serenade low (44) +++ ---- ++ + ---- ---- ---- ----
Sonata low +++ ---- ++ NR ---- ---- ---- ----
Taegro** low +++ ---- ++ + ---- ---- ---- ----
Vintre low +++ ---- ---- ---- ---- ---- ---- ----
Actinovate low ++ ----- ---- ---- ---- ----- ---- ----
Employ* low ++ ---- ---- ---- ---- ---- ---- ----
HiPeak* low ++ ---- ---- ----- ----- ----- ---- ----
Prev-am*4 low ++ ---- ---- ---- ---- ++ ---- ----
Sporan low ++ ---- ---- ---- ---- ---- ---- ----
Timorex*4 low ++ ---- ---- ---- ---- ---- ---- ----
VigorCal* low ++ ---- ---- ---- ---- ---- ---- ----
VigorK* low ++ ---- ---- ---- ---- ---- ---- ----
Double Nickel low + ---- + NR ---- ---- ---- ----
Sporatec low + ---- ---- ---- ---- ---- ---- ----
B-Lock* low ---- --- ---- ----- ----- ++++ ++ NR
Vitiseal low ---- ---- ---- ---- ---- ++++ ---- ----
Botector low ND ---- + ---- ---- ---- ---- ----
Rating: ++++ = excellent and consistent, +++ = good and reliable, ++ = moderate and variable, + = limited and/or erratic, +/- = minimal and often ineffective, ---- = ineffective; ND = no data and NR = not recommended.
* Registration pending in California.
** 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 actions. Fungicides with a different group number are suitable to alternate in a resistance management program. In California, make no more than one application of fungicides with mode-of-action Group numbers 1, 4, 9, 11, or 17 before rotating to a fungicide with a different mode-of-action Group number; for fungicides with other Group numbers, 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/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.

Adaskaveg, J. E., B. A. Holtz, T. J. Michailides, and W. D. Gubler. 2017. Efficacy and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut, Strawberry, and Vine Crops (PDF)

Text Updated: 06/17