Onion - Home Use Fungicides

Fungicides for HOME use on Onions in Utah, organized by Mode of Action (MoA).

Active Ingredient Brand Name MoA Residual (days) Purple Blotch Stemphylium Leaf Blight Botrytis Neck Rot Pink Rot
copper Natural Guard Copper SoapB, Monterey liqui-CopB, Bonide Copper FungicideB M1 7 See label for listed diseases
chlorothalonil Bonide Fung-onil, Fertilome Broad Spectrum Landscape & Garden Fungicide, Hi-Yield Vegetable Flower Fruit & Ornamental Fungicide, Ortho Max Garden Disease Control M5 7 X      
Bacillus subtilis strain QT 713 Serenade Garden Disease ControlB 44 7 X   X  

B= Biopesticide

Note: All brands are registered trademarks. The brands listed in this table are not all-inclusive, but are meant to provide examples of products for these crops in Utah. Always check the label for the specific crop you are treating, application and safety information, and protection and pre-harvest intervals.