How to Manage Pests

UC Pest Management Guidelines

Strawberry

2017 Fungicide Efficacy and Treatment Timing

(Reviewed 6/17, updated 6/17)

In this Guideline:


FUNGICIDE EFFICACY FOR STRAWBERRY DISEASES

Fungicide Resistance risk (FRAC#)1 Powdery mildew Gray Mold Anthracnose Angular Leaf Spot Common Leaf Spot Mucor Rot Rhizopus Rot Leather Rot Crown Rot Red Steele
Bumper/Tilt8 high (3) ++++ ---- ++ ---- +++ ---- ---- ---- ---- ----
Luna Privilege high (7) ++++ ++++ ND ---- ND ND ND ND ND ND
Luna Sensation medium (7/11)2 ++++ ++++ ND ---- ND ND ND ND ND ND
Luna Tranquility medium (7/9)2 ++++ ++++ ND ---- ND ND ND ND ND ND
Mettle high (3) ++++ NR ND ND ND ND ND ---- ---- ----
Procure high (3) ++++ ---- + ---- ---- ---- ---- ---- ---- ----
Quadris Top8 Medium (3/11) ++++ ++ +++ ---- ---- ND + ND ND ND
Quilt Xcel, Avaris 2XS8 medium (3/11) ++++ ++ +++ ---- ---- ND + ND ND ND
Quintec high (13) ++++ ---- ---- ---- ---- ---- ---- ---- ---- ----
Rally high (3) ++++ ---- ++ ---- ++++** ---- ---- ---- ---- ----
Rhyme high (3) ++++ ---- NR ---- NR NR       NR NR NR NR
Torino high (U6) ++++ ---- ---- ---- ---- ---- ---- ---- ---- ----
Abound7,8 medium (11)2 +++ ++ +++ ---- ---- ND ND ND ND ND
Cabrio medium (11)2 +++ ++ ++ ---- ---- ND ND ND ND ND
Evito medium (11)2 +++ ++ ++ ---- ---- ND ND ND ND ND
Fontelis high (7) +++ ++++ ND ND ND ND ND ND ND ND
Kenja high (7) +++ ++++ ND ND ND ND ND ND ND ND
Merivon8 medium (7/11)2 +++ ++++ ND ---- ---- ND ND ND ND ND
Ph-D, Oso medium (19) +++ ++ ++ ND ND ---- ---- ---- ---- ----
Pristine8 medium (7/11)2 +++ ++++ ND ---- ---- ND ND ND ND ND
Sulfur low (M2) +++ ---- ---- ---- ---- ---- ---- ---- ---- ----
Topsin-M, T-Methyl, Incognito very high (1)2 +++ +++ ---- ---- ++ ---- ---- ---- ---- ----
Velum One10 high (7) ++ + ND ---- ND ND ND ND ND ND
Captan very low (M4) +/- ++++ +++ ---- ---- + ---- ---- ---- ----
Elevate high (17)2,6 +/- ++++6 + ---- ---- ---- ---- ---- ---- ----
Aliette3, 7, Legion** low (33) ---- ---- ---- ---- ---- ---- ---- +++ ++ ++
Bravo low (M5) ---- NR ++ NR +++ NR NR NR NR NR
Captevate medium (M4/17)2 ---- +++ +++ ---- ---- + ---- ---- ---- ----
Copper low (M1) ---- ---- ---- +++5 ---- ---- ---- ---- ---- ----
Fungi-Phite, K-Phite, Prophyt low (33) ---- ---- ---- ---- ---- ---- ---- +++ ++ ++
Ridomil Gold SL4 high (4)2 ---- ---- ---- ---- ---- ---- ---- +++4 ++ ++
Rovral, Ipro-dione, Nevado low (2) ---- +++ ---- ---- ---- ++ ---- ---- ---- ----
Switch7 high (9/12) ---- ++++ +++ ---- ---- + +++ ---- ---- ----
Thiram low (M3) ---- ++ ++ ---- ---- ---- ---- ---- ---- ----
Biologicals/ Natural Products
Fracture low ++ + ---- ---- ---- ---- ---- ---- ---- ----
Serenade ASO, Serenade Opti low ++ + ---- ---- ---- ---- ---- ---- ---- ----
Actinovate7 low + ---- + ---- ---- ---- ---- ---- ---- ----
Cinnacure low + ---- ---- ---- ---- ---- ---- ---- ---- ----
Double Nickel low + ---- ---- ---- ---- ---- ---- ---- ---- ----
M-Pede low + ---- ---- ---- ---- ---- ---- ---- ---- ----
Rating:        ++++ = excellent and consistent; +++ = good and reliable; ++ = moderate and variable; + = limited and/or erratic; +/- = minimal and often ineffective; ---- = ineffective; NR = not registered; 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 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  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 plantbackinterval.
5 More than 4 applications causes 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 Bravo is registered under a 24c special local needs for nursery use only on non-bearing plants. It is used as a dip treatment of transplants.
10 Velum One is a fluopyram formulation for chemigation. Soil applications are designed for nematode management but may also suppress powdery mildew.

STRAWBERRY: TREATMENT TIMING

Note: Not all indicated timings may be necessary for disease control.

Disease Preplant fumigation2 Clean nursery stock At Planting Preharvest1
Dips or water washing Before overhead irrigations Foliar Fruit
Angular leaf spot + +++ + +++ + ----
Anthracnose3 +++ +++ +++ + + +++
Botrytis fruit rot3 ---- ---- ---- + ++ +++
Common leaf spot3 + +++ +++ +++ +++ +
Fusarium wilt +++ ++ ---- ---- ---- ----
Leather rot4 +++ ---- ---- ++ ---- ++
Macrophomina crown rot +++ ++ ---- ---- ---- ----
Mucor fruit rot ---- ---- ---- + + +++
Powdery mildew3 ---- +++ ---- ---- +++ +
Phytophthora crown rot4 +++ + ---- ++ + ----
Red steele4 ++ ++ ---- + ++ ----
Rhizopus rot ---- ---- ---- ---- ---- +++
Verticillium wilt +++ ++ ---- ---- ---- ----
Rating:  +++ = most effective, ++ = moderately effective, + = least effective, and ---- = ineffective.
1 Preharvest treatments include applications of fungicides before heavy fog, dews, or rain.
2 Preplant fumigation includes methyl bromide/chloropicrin, 1,3-dichloropropene/chloropicrin or chloropicrin followed by metam sodium or metam potassium or solitary applications of 1,3-dichloropropene/chloropicrin or chloropicrin.
3 Integrated programs required for management, including rotation of fungicides of different classes.
4 In-season foliar treatments include phosphite or fosetyl-aluminum products or soil applications.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Strawberry
UC ANR Publication 3468

General Information

Acknowledgment: Adaskaveg et al., 2017. Efficacy and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut, Strawberry, and Vine Crops. (PDF)

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