Onion - Home Use Insecticides

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

Active Ingredient Brand Name MoA Residual (days) Thrips Maggots Leafminers Spider Mites
malathion Bonide Malathion, Spectracide Malathion; Ortho Max Malathion 1B 5 See label for listed pests
gamma-cyhalothrin Spectracide Triazicide 3 14 X X X  
pyrethrin Monterey Bug Buster -OOB, Worry Free Insecticide and MiticideB 3 5 X X X  
pyrethin + piperonyl butoxide Bonide Bon-Neem II 3 5 X   X  
zeta-cypermethrinrin GardenTech Sevin 3 14 X X X  
pyrethrins + potassium salts of fatty acids (insecticidal soap) Safer Brand Tomato & Vegetable Insect KillerOB 3/NC 5 X   X  
pyrethrin + sulfur Bonide Tomato and Vegetable 3 in 1B, Natria Insect, Disease, & Mite ControlB , Ortho Insect, Mite, & Disease 3 in 1B 3/M2 5 X X X X
spinosad Bonide Captain Jack'sB, Monterey Garden Insect SprayOB 5 7-10 X   X  
neem oil plus pyrethrin Fertilome Triple ActionB, NC 3 X   X X
neem oil plus pyrethrin FertiLome Triple ActionB --- 3 X   X X
oils: plant-based Garden Safe Neem OilOB, Natural Guard Neem SprayOB; Monterey Neem OilOB NC 1       X
potassium salts of fatty acids (insecticidal soap) Safer 3-in-1 Garden SprayB; Natria Insecticidal SoapB NC 7 See label for listed pests

B= Biopesticide
ᴼ = Organic
UN = MoA Unknown
NC = Not Classified

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.