Skip to main content

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
chlorothalonil FertiLome; Bonide Fung-onil M1 7 X      
copper Monterey Liqui-cop; Bonide Copper Spray M1 7 See label See label See label See label
Bacillus subtilis strain QST 713 Bayer NatriaB M5 7 X   X  

Note: The information provided is not an endorsement or recommendation for any particular product. Always read the label before applying and follow the directions. Some of these materials may be tank mixed with other herbicides.