How to Manage Pests

UC Pest Management Guidelines


General Properties of Fungicides

(Reviewed 11/09, updated 3/13)

In this Guideline:

Common name
(trade name)
Chemical class
(FRAC #)1
Activity Mode of action Resistance potential Comments
azoxystrobin (Abound) Qol5 (11) contact, systemic single-site high  
azoxystrobin/difenoconazole (Quadris Top) QoI5/DMI2-triazole (3/11) systemic (local) single-site medium  
azoxystrobin/propiconazole (Quilt Xcel) QoI5/DMI2-triazole (3/11) systemic (local) single-site medium  
Captan (Captan) phthalamide (M4) contact multi-site low highly toxic to honey bee larvae
chlorothalonil (Bravo/etc.) aromatic nitrile (M5) contact multi-site low  
dicloran (Botran 75W) aromatic hydrocarbon (14) systemic single-site high  
fenarimol (Rubigan) DMI2-triazole (3) systemic (local) single-site high  
fenbuconazole (Indar) DMI2-triazole (3) systemic (local) single-site high  
fenhexamid (Elevate/etc.) hydroxyanilide (17) contact single-site high pre- and postharvest
fosetyl-al (Aliette) systemic  
fludioxonil (Scholar) phenylpyrrole (12) systemic (local) single-site high postharvest on fruit
iprodione (Rovral/Nevado/etc.) dicarboximide (2) systemic (local) multi-site low  
fuopyram/trifloxystrobin (Luna Sensation) SDHI4 (7)/QoI5 (11) systemic (local) multi-site medium postharvest on fruit
metconazole (Quash) DMI2-triazole (3) systemic (local) single-site high  
mefenoxam (Ridomil Gold) acylalanine (4) systemic single-site high  
myclobutanil (Rally) DMI2-triazole (3) systemic (local) single-site high  
penthiopyrad (Fontelis) SDHI4 (7) systemic (local) single-site high  
pyraclostrobin/boscalid (Pristine) QoI5/SDHI4 (11/7) systemic single-site/multi-site medium/low  
propiconazole (Bumper/etc.) DMI2-triazole (3) systemic (local) single-site high pre- and postharvest
quinoxyfen (Quintec) quinoline (13) medium  
sulfur inorganic (M2) contact multi-site low highly toxic to native strains of western predatory mite (Galendromus occidentalis) and to parasites
tebuconazole (Elite/etc.) DMI2-triazole (3) systemic (local) single-site high pre- and postharvest
tebuconazole/trifloxystrobin (Adament) DMI2-triazole/strobilurin (3/11) systemic (local)/contact single-site medium  
thiophanate-methyl (Topsin-M,etc.) MBC3 (1) systemic (local) single-site very high  
triflumizole (Procure) DMI2-imidazole (3) systemic (local) single-site high  
1 Group numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of actions (for more information, see 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 DMI = demethylation (sterol) inhibitor
3 MBC = Methyl Benzimidazole Carbamate
4  SDHI = Succinate Dehydrogenase Inhibitor
5 QoI = Quinone outside Inhibitor



[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Cherry
UC ANR Publication 3440

General Information

Acknowledgment: Adaskaveg et al. Efficacy and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut, Strawberry, and Vine Crops. For the most current information see the 2012 edition (PDF).

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