How to Manage Pests

UC Pest Management Guidelines

Apricot

General Properties of Fungicides

(Reviewed 10/14, updated 10/14)

In this Guideline:


Caution: Never apply sulfur to apricot trees or captan to apricot fruit.

Common name (Example trade name) Chemical class Activity Mode of action (FRAC Group No. 1) Resistance potential Comments
azoxystrobin (Abound) QoI2 contact, systemic single-site (11) high3  
captan phthalamide contact multi-site (M4) low highly toxic to honey bee larvae
chlorothalonil (Bravo, etc.) chloronitrile contact multi-site (M5) low  
copper inorganic contact multi-site (M1) low  
copper -bordeaux inorganic contact multi-site (M1) low  
cyprodinil (Vangard) anilinopyrimidine mostly contact; slight systemic single-site (9) high3  
dicloran (Botran) aromatic hydrocarbon mostly contact; slight systemic single-site (14) medium  
difenoconazole / cyprodinil (Inspire Super) DMI4-triazole/ anilinopyrimidine systemic (local)5/mostly contact single-site / single site (3 / 9) high  
difenoconazole / azoxystrobin (Quadris Top) DMI-triazole/QoI2 systemic (local)5 single-site / single site (3 / 11) medium  
fenbuconazole (Indar) DMI4-triazole systemic (local) 5 single-site (3) high  
fenhexamid (Elevate) hydroxyanilide contact single-site (17) high3  
fludioxonil (Scholar) phenylpyrrole contact multi-site (12) medium postharvest fruit treatment
fosetyl-al (Aliette) phosphonate systemic unknown (33) low  
iprodione (Rovral, Nevado, Iprodione) dicarboximide systemic (local) single site? (2) medium highly toxic to honey bee larvae
mefenoxam (Ridomil Gold) phenylamide contact; systemic single-site (4) high3  
metconazole (Quash) DMI4-triazole systemic (local)5 single-site (3) high  
myclobutanil (Rally) DMI4-triazole systemic (local)5 single-site (3) high  
penthiopyrad (Fontelis) SDHI7 contact single-site (7) high  
phosphorous acid (ProPhyt, Fungi-Phite) phosphonate systemic multi-site (33) low  
propiconazole (Bumper ES, Tilt) DMI4-triazole systemic (local)5 single-site (3) high  
propiconazole / azoxystrobin (Quilt Xcel) DMI4-triazole / QoI2 systemic (local)5 single-site / single site (3 / 11) medium  
pyraclostrobin / boscalid (Pristine) QoI2/SDHI7 contact; systemic5 single-site / single site (11 / 7) high  
pyraclostrobin / fluxapyrazad (Merivon) QoI2/SDHI7 systemic5 single-site / single site (11 / 7) high / med  
pyrimethanil (Scala) anilinopyrimidine mostly contact; slight systemic single-site (9) high  
quinoxyfen (Quintec) quinoline contact single-site (13) medium  
tebuconazole (Tebucon, Toledo) DMI4-triazole systemic (local)5 single-site (3) high  
thiophanate-methyl (Topsin M) MBC8 systemic (local) single-site (1) very high  
trifloxystrobin (Gem) Qol2 contact; systemic5 single-site (11) high  
ziram carbamate (DMDC6) contact multi-site (M3) low highly toxic to honey bee larvae
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, 7, 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 SAR = systemic acquired resistance induced in host
4 DMI = demethylation (sterol) inhibitor
5 Generally considered to have systemic action based on performance data but has not been proven experimentally.
6 DMDC = dimethyl dithiocarbamate
7 SDHI = succinate dehydrogenase inhibitor
8 MBC= methyl benzimidazole carbamate

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Apricot
UC ANR Publication 3433

Acknowledgment: Adaskaveg et al., 2015. Efficacy and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut, Strawberry, and Vine Crops. (PDF).

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