Important Preharvest Intervals (PHIs) for Vegetables

Revised: 
March 2020

Important Preharvest Intervals (PHIs) for Vegetables

Vegetable

Herbicide

PHI (days)

Bean

bentazon (Basagran)

30

clethodim (Select Max)

30 dry; 21 snap

clomazone (Command)

45 snap

fomesafen (Reflex)

30

halosulfuron (Sandea)

30

imazamox (Raptor)

0 for snap or dry

lactofen (Cobra)

55 for snap beans, Oregon only

quizalofop P-ethyl (Assure II)

15 for snap bean; 30 dry bean; 60 lentils

sethoxydim (Poast)

15 for snap beans; 30 dry

Beet, table

clethodim (Select)

30

clopyralid (Stinger)

30

ethofumesate (Nortron)

30

phenmedipham (Spin-Aid)

60

phenmedipham + desmedipham (Sugarbeet Mix)

50

triflusulfuron (Upbeet)

30

Broccoli, Brussels sprout, cauliflower, leafy brassicas

clethodim (Select)

14 leafy brassica crops; 30 others

clopyralid (Stinger)

30

S-metolachlor (Dual Magnum)

60

sethoxydim (Poast)

30; 15 for leafy greens

Cabbage

clethodim (Select)

30

clomazone (Command)

45

Carrot

clethodim (Select)

30

ethofumesate (Nortron)

30

fluazifop (Fusilade DX)

45

linuron (Lorox)

14

metribuzin (Glory)

60

pendimethalin (Prowl H2O)

60

sethoxydim (Poast)

30

Celery

linuron (Lorox)

67

Coriander, Cilantro

linuron (Lorox)

21

prometryn (Caparol)

30

sethoxydim (Poast)

15

Corn, sweet

clopyralid (Stinger)

30 ears and forage; 60 stover

clomazone (Command)

45

dimethenamid-P (Outlook)

50 ears; 40 forage

foramsulfuron (Option)

45

fluroxypyr (Starane)

31 ears and forage

S-metolachlor (Dual Magnum)

30

mesotrione (Callisto)

45

tembotrione (Laudis)

45

tolpyralate (Shieldex)

35

topramezone (Impact)

45

Cucurbit/vine crops (all)

clethodim (Select)

14

clomazone (Command)

30

dimethenamid-P (Outlook)

90 on Golden Delicious squash

halosulfuron (Sandea)

30 squash, cucumber, and pumpkin; 57 melon

sethoxydim (Poast)

3 cantaloupe; 14 others

Dill

linuron (Lorox)

21

Edamame

bentazon (Basagran)

30

fomesafen (Reflex)

30

pendimethalin (Prowl)

85

S-metolachlor (Dual Magnum)

120 for hay; 60 for forage

Garlic

bromoxynil (Buctril)

112

clethodim (Select)

45

dimethenamid-P (Outlook)

30

fluazifop (Fusilade DX)

45

oxyfluorfen (GoalTender)

60

paraquat (Gramoxone)

60

pendimethalin (Prowl)

45

sethoxydim(Poast)

30

Lettuce and leaf crops

clethodim (Select)

14

pronamide (Kerb)

55

sethoxydim (Poast)

15 leaf; 30 head

triflusulfuron (UpBeet)

60 for endive and chicory

Onion

clethodim (Select Max)

45 bulb only

dimethenamid-P (Outlook)

28

ethofumesate (Nortron)

30

fluazifop (Fusilade)

45 bulb only

oxyfluorfen (Goal)

45 bulb only

oxyfluorfen (GoalTender)

60

paraquat (Gramoxone)

60

sethoxydim (Poast)

30

trifluralin (Treflan)

60 bulb only

Pea (green or English)

metribuzin (Glory)

50

quizalofop P-ethyl (Assure II)

30

Pepper, bell

pendimethalin (Prowl H2O)

70

S-metolachlor (Dual Magnum)

60

sethoxydim (Poast)

7

Rhubarb

clethodim (Select)

30

S-metolachlor (Dual Magnum)

62

mesotrione (Callisto)

21

pronamide (Kerb)

38

quinclorac (Quinstar)

30

sethoxydim (Poast)

30

sulfentrazone (Zeus)

80

Spinach

clethodim (Select)

14

phenmedipham (Spin-Aid)

21

sethoxydim (Poast)

15

Tomato, eggplant

clethodim (Select)

20

metribuzin (Glory)

7

paraquat (Gramoxone Inteon)

30 tomato

pendimethalin (Prowl H2O)

21 tomato; 70 eggplant

rimsulfuron (Matrix)

45

sethoxydim (Poast)

20 tomato and eggplant

S-metolachlor (Dual Magnum)

90