How to Manage Pests

UC Pest Management Guidelines


Plum

General Properties of Fungicides Used in Plums

(Reviewed 5/06, updated 4/09)

In this Guideline:


Common name
(trade name)
Chemical class
(FRAC No.)1
Activity Mode of action Resistance potential Comments
azoxystrobin (Abound) strobilurin (11) contact, systemic singlesite high  
bordeaux inorganic (M1) contact multisite low  
captan phthalamide (M4) contact multisite low highly toxic to honey bee larvae
chlorothalonil (Bravo) chloronitrile (M5) contact multisite low  
copper inorganic (M1) contact multisite low  
cyprodinil (Vangard) anilinopyrimidine (9) mostly contact singlesite high  
fosetyl-al (Aliette) phosphorothiolate (33) systemic  
fludioxonil (Scholar) phenylpyrrole (12) contact few to multisite low  
iprodione (Rovral) dicarboximide (2) systemic (local) multisite low  
mefenoxam (Ridomil Gold) acylalanine (4) systemic single-ite high  
myclobutanil (Rally) DMI 2-triazole (3) systemic (local) singlesite high  
propiconazole (Bumper/Orbit) DMI 2-triazole (3) systemic (local) singlesite high  
pyraclostrobin/boscalid (Pristine) strobilurin/carboxyanilide (11/7) systemic singlesite/multisite medium/low  
pyrimethanil (Scala) anilinopyrimidine (9) mostly contact singlesite high  
sulfur inorganic (M2) contact multisite low highly toxic to native strains of western predatory mite (Galendromus occidentalis) and to parasites
thiophanate-methyl (Topsin) benzimidazole (1) systemic (local) singlesite very 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

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Plum
UC ANR Publication 3462
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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