Onion Weed Control

Onion Preplant and Preemergent Weed Control
Weeds Herbicide, Mode of Action Code, and Formulation Amount of Formulation per Acre Pounds of Active Ingredient per Acre
Suppression or control of most annual grasses and broadleaf weeds, full rate required for nutsedge control

metam sodium

(Vapam HL) 42%

37.5 to 75 gal 15.7 to 31.5
Contact kill of all green foliage, stale bed application

paraquat, MOA 22

(Firestorm, Parazone) 3 S

1.7 to 2.7 pt

0.65 to 1

paraquat, MOA 22

(Gramoxone SL) 2 SL

2.5 to 4 pt

0.65 to 1
Annual and perennial grass and broadleaf weeds

glyphosate, MOA 9

(numerous brands and formulations)

See labels See labels
Most broadleaf weeds less than 4 in. tall or rosettes less than 3 in. in diameter; does not control grasses

carfentrazone-ethyl, MOA 14

(Aim) 2.0 EC

Up to 2 oz Up to 0.031
Annual grasses and small-seeded broadleaf weeds

bensulide, MOA 8

(Prefar) 4 E

5 to 6 qt 5 to 6

DCPA, MOA 3

(Dacthal) W-75

8 to 10 lb

6 to 7.5

DCPA, MOA 3

(Dacthal) 6 F

8 to 10 pt

6 to 7.5
Annual broadleaf weeds

oxyfluorfen, MOA 14

(Galigan) 2 E

1 to 2 pt

0.25 to 0.5

oxyfluorfen, MOA 14

(Goal 2 XL) 2 EC

1 to 2 pt

0.25 to 0.5

oxyfluorfen, MOA 14

(GoalTender) 4 E

1 pt 0.5
Most annual grasses and some broadleaf weeds

pendimethalin, MOA 3

(Prowl) 3.3 EC

See label See label

pendimethalin, MOA 3

(Prowl) 3.8 AS

See label See label

dimethenamid-P, MOA 15

(Outlook) 6 EC

12 to 21 oz 0.6 to 1
Annual grasses and broadleaf weeds, yellow nutsedge suppression

S-metolachlor, MOA 15

(Dual Magnum) 7.62 EC

8 to 16 oz 0.47 to 0.96
Onion Postemergent Weed Control
Weeds Herbicide, Mode of Action Code, and Formulation Amount of Formulation per Acre Pounds of Active Ingredient per Acre
Most annual broadleaf weeds

oxyfluorfen, MOA 14

(Galigan) 2 E

 

0.5 pt

 

0.12

oxyfluorfen, MOA 14

(Goal 2 XL) 2 EC

0.5 pt

0.12

oxyfluorfen, MOA 14

(GoalTender) 4 E

0.25 pt 0.12
Common lambsquarters, common chickweed, common purslane, black nightshade, ladysthumb, Pennsylvania smartweed, redroot pigweed, and some annual grasses

ethofumesate, MOA 8

(Nortron) 4 SC

16 to 32 oz 0.5 to 1
Most broadleaf weeds less than 4 in. tall or rosettes less than 3 in. in diameter; does not control grasses

carfentrazone-ethyl, MOA 14

(Aim) 1.9 EW or 2 EC

Up to 2 oz Up to 0.031
Most emerged weeds

glyphosate, MOA 9

(numerous brands and formulations)

See labels See labels
Annual and perennial grasses only

fluazifop, MOA 1

(Fusilade DX) 2 EC

6 to 16 oz 0.1 to 0.25

sethoxydim, MOA 1

(Poast) 1.5 EC

1 to 1.5 pt 0.2 to 0.3

clethodim, MOA 1

(Arrow, Clethodim, Intensity, Select) 2 EC

6 to 16 oz

0.09 to 0.25

clethodim, MOA 1

(Intensity One, Select Max) 1 EC

9 to 32 ox

0.07 to 0.25