Agriculture: Strawberry Pest Management Guidelines

Fungicide Efficacy—Conventional Products

Fungicide Resistance risk (FRAC group number)1 Powdery mildew Gray mold Anthrac- nose Common leaf spot Rhizopus/Mucor rot Phyto- phthora diseases Angular leaf spot
Abound2 medium (11) 4 2R 4R NL NL (2) NL NL
Actigard low (P1) NL NL NL NL NL NL 3
Aliette3, 7, Legion** low (P07,33) NL NL NL NL NL 4 NL
Bumper, Tilt high (3) 5  NL (0) NL (3) 4 NL (0) NL NL
Cabrio2 medium (11) 4 2R 4R 0 NL (2) NL NL
Captan very low (M4) NL (1) 4 NL (4) 0 NL (2) NL NL
Captevate2 medium (M4/17) NL 4 4 NL NL NL NL
Copper low (M1) 0 0 0 0 0   0 45
Elevate2,6 high (17) NL (1) 56 NL (2) NL (0) NL NL NL
Evito*2 medium (11) 4 2R 3R NL NL NL NL
Flint Extra high (11) 4 2R 2R NL NL NL NL
Fontelis high (7) 4 5R ND NL NL NL NL
Fungi-Phite, K-Phite, Prophyt low (P07,33) NL NL NL NL NL 4 NL (2)
Gatten* high? (U13) 4 NL NL NL NL  NL   NL
Intuity2 medium (11) 2 3R NL NL (0) NL NL NL
Kenja high (7) 4 5 ND ND NL (2) NL NL
Luna Privilege (foliar)/ Velum One (soil)9 high (7) 5/3 5/2 NL ND ND ND NL
Luna Sensation2 medium (7/11) 5 4 3R ND 2 NL NL
Luna Tranquility2 medium (7/9) 5 4 NL ND 1 NL NL
Merivon2,8 medium (7/11) 5 5 ND 0 NL (4) NL NL
Mettle, Perissim high (3) 5 NL NL ND NL NL NL
Miravis Prime medium (7/12) 5 4 3 NL 3 NL NL
Ph-D, Oso medium (19) 4 3 3 NL NL NL NL
Pristine2,8 medium (7/11) 4 5R ND 0 NL NL NL
Procure high (3)  5 NL NL (2) NL (0) NL   NL   NL
Protocol medium (1/3) 4 4R 3 NL NL NL   NL
Quadris Top8 medium (3/11) 5 NL (3)R 4R 0 NL NL NL
Quilt Xcel, Avaris 2XS medium (3/11) 5 3 4R NL 2 NL NL
Quintec high (13) 5 NL (0) NL (0) NL (0) NL (0) NL NL
Rally high (3) 5 NL (0) NL (3) 4 NL NL NL
Rhyme high (3) 5 0 NL NL       NL NL NL
Ridomil Gold SL2,4 high (4) NL NL NL NL NL 44 NL
Rovral, Iprodione, Nevado low (2) NL (0) 4 0 0 NL NL NL
Scala high (9) 2 3 NL NL NL NL NL
Sulfur low (M2) 4 NL NL NL NL   NL   NL
Switch7 high (9/12) 2 5R 4 NL NL (4) NL NL
Thiram low (M3) NL (0) 2 3 0 NL NL NL
Topsin-M, T-Methyl, Incognito2 very high (1) 4 4R 0 NL (3) NL   NL   NL
Torino high (U6) 5 NL NL NL NL   NL   NL
Zivion S low (48) ND 3 4 NL 3 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, ND = no data.
* 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** Not registered, label withdrawn or inactive in California.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 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 group numbers for subsequent applications, use labeled rates (preferably the upper range), and limit the total number of applications per season.
3 Foliar applications provide systemic treatment.
4 Ridomil Gold SL is the only formulation registered. If the GR formulation is applied to a previous crop that must be removed, it has a 0-day plantback interval.
5 More than 4 applications cause severe stunting.
6 Nonpersistent resistant populations of Botrytis cinerea to fenhexamid occur with repeated use of FRAC group 17 fungicides.
7 Plant dip (nurseries) or foliar spray (field use).
8 Not for use in nurseries, on nursery transplants, or greenhouses (check label for details).
9 Velum One is a fluopyram formulation for chemigation. Soil applications are designed for nematode management but may also suppress powdery mildew.
R Resistant isolates documented in pathogen populations.

Acknowledgment: Adaskaveg et al., 2022. Fungicides, Bactericides, Biocolntrols, and Natural Products for Deciduous Tree Fruit and Nut, Citrus, Strawberry, and Vine Crops in California. (PDF)

Text Updated: 03/22