How to Manage Pests

UC Pest Management Guidelines

| All strawberry pests | More crops | About guidelines |

Strawberry

2012 Fungicide Efficacy and Treatment Timing

(Reviewed 3/10, updated 6/12)

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
Copper low (M1) ---- ---- ---- +++5 ---- ---- ---- ---- ---- ----
Sulfur low (M2) +++ ---- ---- ---- ---- ---- ---- ---- ---- ----
Bumper/Tilt high (3) ++++ ---- ++ ---- +++ ---- ---- ---- ---- ----
Mettle* high (3) ++++ NR ND ND ND ND ND ---- ---- ----
Procure high (3) ++++ ---- + ---- ---- ---- ---- ---- ---- ----
Quilt Xcel medium (3/11) ++++ ++ +++ ---- ---- ND + ND ND ND
Rally high (3) ++++ ---- ++ ---- ++++** ---- ---- ---- ---- ----
Topsin-M/T-Methyl/Incognito very high (1)2 +++ +++ ---- ---- ++ ---- ---- ---- ---- ----
Quadris medium (11)2 +++ ++ ++ ---- ---- ND ND ND ND ND
Pristine medium (7/11)2 +++ ++++ ND ---- ---- ND ND ND ND ND
Ph-D medium (19) +++ ++ ++ ND ND ---- ---- ---- ---- ----
Fontelis* high (7) +++ ++++ ND ND ND ND ND ND ND ND
Cinnacure low + ---- ---- ---- ---- ---- ---- ---- ---- ----
Elevate high (17)2,6 +/- ++++6 +++ ---- ---- ---- ---- ---- ---- ----
M-Pede low + ---- ---- ---- ---- ---- ---- ---- ---- ----
Quintec high (13) ++++ ---- ---- ---- ---- ---- ---- ---- ---- ----
Rovral/Ipro-dione/Nevado low (2) ---- +++ ---- ---- ---- ++ ---- ---- ---- ----
Switch high (7/12) ---- ++++ +++ ---- ---- + +++ ---- ---- ----
Captan very low (M4) ---- +++ +++ ---- ---- + ---- ---- ---- ----
Thiram low (M3) ---- ++ ++ ---- ---- ---- ---- ---- ---- ----
Aliette/Legion3 low (33) ---- ---- ---- ---- ---- ---- ---- +++ ++ ++
Fungi-Phite, K-Phite, Prophyt low (33) ---- ---- ---- ---- ---- ---- ---- +++ ++ ++
Ridomil Gold SL4 high (4)2 ---- ---- ---- ---- ---- ---- ---- +++4 ++ ++
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
*Registration pending in California
** Plant dip or foliar spray.1Group numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of actions (for more information, see http://www.frac.info/). 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.
2To 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.
4Ridomil 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.
5Greater than 4 applications causes severe stunting.
6Nonpersistent resistant populations of Botrytis cinerea to fenhexamid occur with repeated use of FRAC Group 17 fungicides.

FUNGICIDE TREATMENT TIMING IN STRAWBERRY

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
Anthracnose3 +++ +++ +++ + + +++
Botrytis fruit rot3 — — — + ++ +++
Mucor fruit rot — — — + + +++
Rhizopus rot — — — — — +++
Angular leaf spot + +++ + +++ + —
Common leaf spot3 + +++ +++ +++ +++ +
Powdery mildew3 — +++ — — +++ +
Leather rot4 +++ — — ++ — ++
Phytophthora crown rot4 +++ + — ++ + —
Red steele4 ++ ++ — + ++ —
Verticillium wilt +++ ++ — — — —
Rating: +++ = most effective; ++ = moderately effective; + = least effective; — = 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 Inseason 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., 2012. Efficacy and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut, Strawberry, and Vine Crops. (PDF)

Top of page

PDF: To display a PDF document, you may need to use a PDF reader.

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2013 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/r734902111.html revised: January 9, 2013. Contact webmaster.