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Onion -  Commercial Fungicides


Fungicides registered for COMMERCIAL 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 Root
iprodione Iprodione, Meteor Nevado, Rovral 2 7-14 See label See label See label See label
propiconazole Amtide, Bumper Fitness, Propi-star Propimax, Sharshield, Tilt, Topaz 3 7 X      
tebuconazole Monsoon, Orius, Tebu-crop Tebuzol, Toledo 3 10 X      
difenoconazole + cyprodinil Inspire 3/9 7 X X    
difenoconazole + azoxystrobin Quadris Top 3/11 7 X X    
propiconazole + azoxystrobin Quilt 3/11 7 X      
mefenoxam + chlorothalonil Ridomil 4/M5 7 X      
boscalid Endura 7 7 X      
penthiopyrad Fontelis 7 7 X X X  
boscalid + pyraclostrobin Pristine 7/11 14 X X X  
cyprodinil Vangard 9 7 X   X  
pyrimethanil Scala 9 7 X   X  
cyprodinil + fludioxonil Switch 9/12 7 X X X  
azoxystrobin Quadris, Satori 11 7 X      
fenamidone Reason 11 5 X      
pyraclostrobin Cabrio 11 7 X      
famoxadone + cymoxanil Tanos 11/27 5 X      
fluazinam Omega 29 7 X   X  
fosetyl-al Aliette, Linebacker 33 7 X      
Bacillus subtilis strain QST 73 CeaseOB SerenadeOB 44 7 See label See label See label See label
copper-based Champ, Cuprofix Cuproxat, C-O-C-S, Kocide, Mastercop Nordox, Nucop M1 7 X      

B= Biopesticide
R= Restricted Use
O= Organic