UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

Search

SKIP navigation
How to Manage Pests

Home & garden
Agriculture
Natural environments
Exotic & invasive

Weather data & products
Degree-days
Interactive tools & models

Identification Galleries

Natural enemies
Weeds

Educational Resources

Publications & more
Workshops and events
Training programs
Pesticide information

Research and IPM

Grants programs
Funded-project results

 
  Printer-friendly version

How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Lettuce

General Properties of Fungicides

(Reviewed 8/07, updated 8/07)

In this Guideline:

Common name
(trade name)		 Chemical class Activity Mode of action(FRAC number) 1 Resistance Comments
azoxystrobin (Quadris) QoI2 systemic3 single-site (11) high —
boscalid (Endura) carboxyanilide systemic3 multi-site (7) low —
copper inorganic contact multi-site (M1) low —
dichloran (Botran) aromatic hydrocarbon systemic (local) single site (14) high —
dimethomorph (Acrobat) cinnamic acid — — (40) — —
famoxadone/cymoxanil (Tanos) QoI2/cyanoacetamide-oximes — — (11/27) — —
fenamidone (Reason) QoI2 systemic3 single-site (11) high —
fosetyl-al (Aliette) phosphonate systemic multi-site (33) low —
iprodione (Rovral) dicarboximide systemic multi-site (2) low toxic to honey bee larvae; do not apply during bloom.
maneb carbamate (EBDC)4 contact multi-site (M3) low —
mefenoxam (Ridomil Gold) phenylamide systemic single-site (4) high —
sulfur inorganic contact multi-site (M2) low toxic to predatory mites and parasites.
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. For fungicides with mode of action Group numbers 1, 4, 9, 11, or 17, make no more than one application 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 QoI = quinone outside inhibitor (strobilurin)
3 Generally considered to have systemic action based on performance data but has not been proven experimentally.
4 EBDC = ethylene bisdithiocarbamate

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Lettuce
UC ANR Publication 3450
General Information
Acknowledgment: This information was adapted from the Fungicide Resistance Action Committee Web site (http://www.frac.info).

Top of page

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2007 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/r441310211.html revised: August 1, 2007. Contact webmaster.