UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

Search

SKIP navigation

Home & garden
Agriculture
Natural environments
Exotic & invasive

Weather data & products
Degree-days
Interactive tools & models

Publications & more
Workshops and events
PCA exam helper
Pesticide information

Grants programs
Funded-project results


 

How to Manage Pests

UC Pest Management Guidelines


Strawberry

2008 Fungicide Efficacy and Treatment Timing

(Reviewed 2/08, updated 2/08)

In this Guideline:


FUNGICIDE EFFICACY FOR STRAWBERRY DISEASES

Note: Disease control in spring and preharvest is not necessary for most plum cultivars in California.
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
Rally high (3) ++++ ++ ++ +++
Procure high (3) ++++ +
Topsin-M very high (1)2 +++ +++ ++
Eminent* high (3) NR NR ND ND ND ND
Copper low (M1) ++
Sulfur low (M2) +++
Quadris medium (11)2 +++ ++ ++ ND ND ND ND ND
Pristine medium (7/11)2 +++ ++++ ND ND ND ND ND ND
Cinnacure low +
Elevate high (17)2 +/- ++++ +++
M-Pede low +
Rovral low (2) +++ ++
Switch high (7/12) ++++ +++ + +++
Captan very low (M4) +++ +++ +
Thiram low (M3) ++ ++
Aliette3 low (33) +++ ++ ++
Ridomil Gold SL 4 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
1. Group 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.
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 plantback interval.

FUNGICIDE TREATMENT TIMING IN STRAWBERRY

Note: Not all indicated timings may be necessary for disease control.
Disease Pre-plant 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, 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.

Adapted from:
Adaskaveg, J. E., B. A. Holtz, T. J. Michailides, and W. D. Gubler. 2008. Efficacy and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut, Strawberry, and Vine Crops (932 KB, PDF)

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Strawberry
UC ANR Publication 3468
General Information

Top of page

PDF: You need a PDF reader, such as Acrobat Reader version 5 or later, to view or print this PDF. If no reader is installed on your computer, you can download a free copy of Adobe Acrobat Reader.


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2008 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 How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/r734902111.html revised: February 22, 2008. Contact webmaster.