Insecticides for Small-Scale Onion Production

Insecticides registered for small-scale use on onions in Utah, Organized by Mode of Action (MoA).

Active Ingredient	Brand Name	MoA	Residual Days	Thrips	Maggots	Leafminers	Bulb Mites	Spider Mites
bifenthrin	Ferti-lome Broad Spectrum Insecticide, Ferti-lome Broad Spectrum Insecticide RTS	3A	2-3 wks	X		X		X
deltamethrin	Hi-Yield Multi-Use Dust	3A	14	X	X	X
deltamethrin	Ortho Insect Killer Flower & Vegetable Garden	3A	14	X	X	X		X
lambda-cyhalothrin	Bonide Eight Garden & Home RTU, GardenTech Sevin Insect Killer RTU, Spectracide Trazicide Insect Killer for Lawns & Landscapes RTU	3A	10-14	X	X	X
pyrethrins^O	Monterey Bug Buster-O	3A	5-7	X	X	X	X
zeta-cypermethrin	GardenTech Sevin Insect Killer Concentrate, GardenTech Sevin Insect Killer RTS	3A	10-14	X	X	X
pyrethrins^O + neem oil^O	Ferti-lome Triple Action, Ferti-lome Triple Action Plus RTU	3A/UN	5-7	X	X	X	X	X
pyrethrins^O + canola oil^O	Espoma Organic Insect Control	3A/UN	5-7	X	X	X	X	X
malathion	Hi-Yield 55% Malathion Spray	3B	5-7		X	X
malathion	Ortho MAX Malathion Insect Spray Concentrate, Bonide Malathion Concentrate	3B	5-7	X	X	X
spinosad^O	Natural Guard Spinosad Concentrate, Natural Guard Spinosad RTS, Monterey Garden Insect Spray, Bonide Captain Jack’s Deadbug Brew Concentrate, Bonide Colorado Potato Beetle Beater	5	7-10
sulfur^O	Garden Tech Sevin Sulfur Dust	UN	7-10				X	X
sulfur^O + pyrethrins^O	Ortho Insect, Mite & Disease, 3-in-1 RTU, Natria Insect Disease, and Mite Control RTU, Natria Insect, Disease, and Mite Control RTS, BioAdvanced Fruit and Vegetable 3-in-1 Solution RTS, BioAdvanced Fruit and Vegetable 3-in-1 Solution Concentrate	UN/3A	10-14	X	X	X	X	X
neem oil^O	Safer Brand Neem Oil Concentrate, Natural Guard Neem Concentrate, Natural Guard Neem RTU, Monterey 70% Neem Oil, Monterey Neem Oil RTU, Natria Neem Oil Concentrate, Natria Neem Oil RTU, BioAdvanced Organics Neem Oil RTU, Espoma Organic Neem Oil 3n1	UN	3	X			X	X
potassium salts of fatty acids^O + seaweed extract^O	Safer Brand Insect Killing Soap RTU Spray	UN	5-7	X			X	X
potassium salts of fatty acids^O	Natural Guard Insectidcal Soap, Monterey Insecticdal Soap RTU, Bonide Insecticidal Soap RTU, Natria Insecticial Soap RTU, BioAdvanced Insecticidal Soap RTU, Espoma Organic Insect Soap	UN	5-7	X			X	X
potassium salts of fatty acids^O + spinosad^O	Natural Guard Spinosad Soap RTU, Natural Guard Spinosad Soap Concentrate, Natural Guard Spinosad Soap RTS, Monterey Garden Insect Soap RTU, Bonide Insecticidal Super Soap RTU, BioAdvanced Organic Tomato, Vegetable, and Fruit	UN/5	7-10	X			X	X
potassium salts of fatty acids^O + sulfur^O	Safer Brand 3-in-1 Concentrate, Safer Brand 3-in-1 RTU Garden Spray, Safer Brand Insect Killing Soap Concentrate	UN	7-10	X			X	X
silicon dioxide	Bonide Diatamaceous Earth	UN	7-14	X	X	X	X	X

Note: All products listed in this table are registered trademarks. The list is not all-inclusive, but provides examples of products that are available for small acreage and home use. Always review the product label for the specific crop you are treating, targeted pests, safety information, and preharvest intervals. All product information was reference in 2023 from various major personal-use pesticide suppliers.
^O = Organic Active Ingredient