Agriculture: Cherry Pest Management Guidelines

General Properties of Fungicides

Common name
(Example 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) contact, systemic (local) single-site/ single site medium
azoxystrobin/propiconazole (Quilt Xcel) QoI5/DMI2-triazole (3/11) contact, systemic (local) single-site/ 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 (local) single-site medium
fenarimol (Rubigan) DMI2-triazole (3) systemic (local) single-site high
fenbuconazole (Indar) DMI2-triazole (3) systemic (local) single-site high
fenhexamid (Elevate) hydroxyanilide (17) contact single-site high pre- and postharvest
fosetyl-al (Aliette) ethyl phosphonate (33) systemic unknown low
fludioxonil (Scholar) phenylpyrrole (12) systemic (local) single-site medium postharvest on fruit
fluopyram/trifloxystrobin (Luna Sensation) SDHI4/QoI5 (7/11) contact, systemic (local) single-site/ single site high postharvest on fruit
iprodione (Rovral/Nevado/) dicarboximide (2) systemic (local) single-site medium
metconazole (Quash) DMI2-triazole (3) systemic (local) single-site high
mefenoxam (Ridomil Gold) acylalanine (4) contact, systemic single-site high
myclobutanil (Rally) DMI2-triazole (3) systemic (local) single-site high
penthiopyrad (Fontelis) SDHI4 (7) contact single-site high
propiconazole (Bumper) DMI2-triazole (3) systemic (local) single-site high pre- and postharvest
pyraclostrobin/boscalid (Pristine) QoI5/SDHI4 (11/7) contact, systemic single-site/single-site high
quinoxyfen (Quintec) quinoline (13) contact single-site medium
sulfur inorganic (M2) contact multi-site low highly toxic to native strains of western predatory mite (Galendromus occidentalis) and to parasites
tebuconazole (Elite) DMI2-triazole (3) systemic (local) single-site high pre- and postharvest
tebuconazole/trifloxystrobin (Adament) DMI2-triazole/ QoI5 (3/11) contact, systemic (local) single-site/ single-site medium
thiophanate-methyl (Topsin-M) 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 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 DMI = demethylation (sterol) inhibitor
3 MBC = Methyl Benzimidazole Carbamate
4 SDHI = Succinate Dehydrogenase Inhibitor
5 QoI = Quinone outside Inhibitor

Acknowledgment: Adaskaveg et al., 2017. Efficacy and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut, Strawberry, and Vine Crops (PDF).

Text Updated: 03/13