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 |

Floriculture and Ornamental Nurseries

General Properties Of Fungicides

(Reviewed 3/09, updated 3/09)

In this Guideline:
Common name (trade name) Chemical class Activity Mode of action1 Resistance potential Comments
azoxystrobin (Heritage) Qol2 single-site 11 high  
Bacillus subtilis (Rhapsody) biological contact NC low  
chlorothalonil (Daconil) chloronitrile multi-site M5 low  
dicloran aromatic hydrocarbon systemic (local) 14 medium  
dimethomorph (Stature) carboxylic acid amines — 40 low-medium  
etridiazole (Terrazole CA) heteroaromatic — 14 low-medium  
fenarimol (Rubigan) DMI3-pyrimidine single-site 3 medium  
fenhexamid (Decree) hydroxyanilide — 17 low-medium  
fixed copper (Kocide, etc.) inorganic multi-site M1 low  
fludioxonil (Medallion) phenylpyrroles — 12 low-medium  
flutolanil (Prostar) carboxamides — 7 medium  
fosetyl-al (Aliette) phosphonate multi-site 33 low  
Gliocladium virens (SoilGard) biological — NC low  
iprodione (Chipco 26019) dicarboximide multi-site 2 medium-high  
lime sulfur inorganic multi-site M2 low incompatible with most other pesticides
mancozeb (Dithane) dithio-carbamate (EBDC)3 multi-site M3 low  
mefenoxam (Subdue Maxx) acylalanine single-site 4 high  
myclobutanil (Hoist) DMI3-triazole single-site 3 medium  
neem oil (Triact) oil — NC none  
PCNB (Terraclor) aromatic hydrocarbon single-site 14 low-medium  
piperalin (Pipron) amines — 5 low-medium  
potassium bicarbonate (Kaligreen) inorganic — NC none  
potassium phosphate (Fosphite) inorganic contact NC low  
propiconazole (Banner Maxx) DMI3-triazole single-site 3 medium  
Streptomyces griseoviridis (Mycostop) biological — NC low  
stylet oil (JMS) oil — NC none  
thiophanate-methyl (FungoFlo, etc.) benzimidazole single-site 1 high  
triadimefon (Strike, etc.) DMI3-triazole single-site 3 medium  
Trichoderma spp. (Garden Solutions, etc.) biological — NC low  
trifloxystrobin (Compass) Qol2 single-site 11 high  
triflumizole (TerraGuard) DMI3-imidazole single-site 3 medium  
wettable sulfur inorganic multi-site M2 low  
— = no information
NC = not classified
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 Qol = quinone outside inhibitor
3 DMI = demethylation (sterol) inhibitor
4 EBDC = ethylene bisdithiocarbamate

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Floriculture and Ornamental Nurseries
UC ANR Publication 3392
Diseases
S. T. Koike, UC Cooperative Extension Monterey County
C. A. Wilen, UC IPM Program, UC Cooperative Extension San Diego County
Acknowledgment for contributions to Diseases:
R. D. Raabe, (emeritus) Environmental Science, Policy, and Management (ESPM), UC Berkeley
A. H. McCain, (emeritus) Environmental Science, Policy, and Management (ESPM), UC Berkeley
M. E. Grebus, Plant Pathology, UC Riverside

Top of page

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2009 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/r280390511.html revised: March 10, 2009. Contact webmaster.