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How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Onion and Garlic

General Properties of Fungicides

(Reviewed 1/07, updated 1/07)

In this Guideline:

Common name
(trade name)		 Chemical class Activity Mode of action
(FRAC # 1)		 Resistance potential
azoxystrobin (Amistar/Quadris) QoI2 contact, systemic single-site (11) high
chlorothalonil (Applause, Bravo, Echo) aromatic nitrile contact multi-site (M4) low
copper inorganic contact multi-site (M1) low
fenamidone (Reason) QoI2 contact & systemic single-site (11) high
iprodione (Rovral) dicarboximide systemic (local) multi-site (M1) low
maneb carbamate (EBDC) contact multi-site (M3) low
mefenoxam (Ridomil Gold) acylalanine systemic single-site (4) high
pyraclostrobin (Cabrio) QoI2 contact & systemic single-site (11) high
tebuconazole (Folicur) DMI3-triazole systemic (local) single-site (3) high
1  Group numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of actions. Fungicides with a different Group number are suitable to alternate in a resistance management program. For more information, see http://www.frac.info/.
2 QoI = quinone outside inhibitor (strobilurin).
3 DMI = demethylation (sterol) inhibitor.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Onion and Garlic
UC ANR Publication 3453
General Information
Information from: Fungicide Resistance Action Committee (http://www.frac.info.)

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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