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Rainfall-free periods, preharvest intervals (PHI), and crop safety restrictions for postemergence herbicides

Herbicide
Time before rainfall
PHI (crop safety restriction)
2,4-D and MCPA 6 to 8 hr Corn: 7 days (Overtop- 8; drop nozzles- before tasseling)

Grain sorghum: (Overtop- 8; drop nozzles- 15)

Rice: (Before internode exceeds 1/2)

Wheat: (Before jointing)

Wheat harvest aid: Hard dough

2,4-DB NI* Soybeans: 60 days
Accent 4 hr Corn: 30 days (overtop- before 20/6 collars; drop nozzles-before 36/10 collars)
Achieve 1 hr Wheat: 60 days
Aim 1 hr Corn: (14 collars)

Cotton: 7 days

Grain sorghum: (6-leaf stage post; harvest aid: 3 days

Rice: 60 days

Soybeans: (V3-V10 post; harvest aid: 3 days)

Wheat: (Jointing; harvest aid: 3 days)

Assure II 1 hr Cotton: 80 days

Soybeans: 80 days

Atrazine 1 to 2 hr Corn: (12)

Grain sorghum: (12)

Authority MTZ NI* Soybeans: 120 days
Banvel 6 to 8 hr Corn: (1 pt- 5; 1/2 pt- 36)

Grain sorghum: (Overtop- 8; drop nozzles- 15)

Wheat: (Before jointing)

Basagran 8 hr*** Corn: No Restrictions

Rice: No Restrictions

Soybeans: No restrictions

Basis 4 hr Corn: (4-leaf)
Beacon 4 hr Corn: 60 days (overtop- before 20; drop nozzles- before tassel emergence)
Bicep products 1 to 2 hr Corn: NA, (5)
Blazer 6 hr Rice: 50 days (Before boot stage)

Soybeans: 50 days

Bronate NI* Wheat: NI*
Buctril Corn: 30 days

Sorghum: (Before boot stage)

Cotton: 60 days

Wheat: NI*

Buctril + Atrazine 1 hr Corn: NI*

Grain sorghum: NI*

Callisto 1 hr Corn: 45 days (30 or 8-leaf)
Clarity 4 hr Corn: (1 pt- 5; 1/2 pt- 36)

Grain sorghum: (Overtop- 8; drop nozzles- 15)

Wheat: (Before jointing)

Classic 1 hr Soybeans: 45 days
Clincher 2 hr Rice: 60 days
Cobra 30 min. Cotton: 70 days

Soybeans: 45 days

Concert 1 hr Soybeans: 60 days
Conclude Xact 4 hr Soybeans: 75 days
Distinct 4 hr Corn: 72 days (24)
Dual II Magnum NA** Corn: (5)
Exceed 4 hr Corn: 60 days (overtop- before 20, drop nozzles- before 30)
Extreme NI* Soybeans: 85 days (before bloom)
FirstRate 2 hr Soybeans: 65 days for grain, 14 days for forage (50% flowering)
Flexstar 4 hr Soybeans: (First bloom)
Frontrow 2 hr Soybeans: 70 days
Fultime NA** Corn: 60 days (11)
Fusilade 1 hr Cotton: 90 days

Soybeans: (First bloom)

Fusion 1 hr Cotton: 90 days

Soybeans: 1st bloom

Gramoxone Max 30 min Burndown: NA**

Corn harvest aid: 7 days

Soybean harvest aid: 14 days

Guardsman Max 1-2 hours Corn: 40 days (8)
Halex GT NI* Corn: 45 days
Harmony Extra Several hours Burndown: NA**

Wheat: 45 days

Harmony GT XP/Unity 1 hour Soybeans: 60 days

Wheat: Before flag leaf stage

Harness Xtra/ Degree Xtra 1 to 2 hr Corn: NA (11)
Harness/Degree NA** Corn: (11)
Hoelon 1 hr Wheat: 77 days
Hornet 2 hr Corn: 85 days (20)
Keystone/Breakfree ATZ NA** Corn: 60 days (11)
Laddok S-12 8 hr*** Corn: 21 days (Fifth leaf)

Grain sorghum: NI*

Lexar 1 hr Corn: 60 days (12)
Liberty 4 hr Corn: 70 days for grain, 60 days for forage (Overtop- 24 or 7 collars, drop nozzles- 36)
Liberty ATZ 4 hr Corn: 70 days for grain, 60 days for forage (12 corn)
Linex NI* Corn: NI*

Grain sorghum: NI*

Soybeans: 60 days

Lumax 1 hr Corn: 45 days (5)
NorthStar 4 hr Corn: 60 days for grain, 45 days for silage (Overtop- 20 or 4 collars, drop nozzles- 36)
Olympus 4 hr Wheat: 71 days
Olympus Flex 4 hr Wheat: 71 days
Osprey 4 hr Wheat hay, grain, and straw: 60 days; Wheat forage: 30 days
Outlook NA** Corn: 40 days (8)
Paramount 6 hr Grain sorghum: (12 inches)
Peak 4 hr Corn: 60 days (48 inches)

Grain sorghum: 60 days (30 inches)

Wheat: 60 days (Second node)

Permit 4 hr Corn: Forage/Silage- 30 days (grain- lay-by)

Grain sorghum: Forage/Silage- 30 days (grain- lay-by)

Rice: 28 days (Preflood application only)

Phoenix 30 min. Soybeans: 45 days
Pinnacle 1 hr Soybeans: 60 days

Wheat: Before flag leaf stage

Poast/Poast Plus/Prestige 1 hr Corn: Grain- 60 days; Forage/Silage- 45 days

Cotton: 40 days

Soybeans: 75 days

Prefix NA** Soybeans: 90 days
Pursuit 1 hr Corn: 45 days

Soybeans: 85 days (Before bloom)

Raptor 1 hr Soybeans: 85 days (Before bloom)
Ready Master ATZ 2 hr Corn: 50 days (12)
Reflex 4 hr Soybeans: (Before bloom)
Resource 1 hr Corn: Forage/Silage- 28 days; Grain- 60 days

Soybeans: 60 days

Roundup 2 hr

(1 hour UltraMax)

(30 min WeatherMax)

Burndown: NA**

Corn: 50 days (24 inches or 6 collars)

Cotton: 7 days (Overtop- 4 leaf; directed- not specified)

Soybeans: 14 days

Harvest aid (Corn, Cotton, Grain sorghum, Small grain, Soybeans) : 7 days

Scepter 2 hr Soybeans: 90 days
Select/ Select Max 1 hr Cotton: 60 days

Soybeans: 60 days (40 days for 4-oz red rice seedhead suppression label)

Sencor NI* Wheat: 21 days Corn: prior to tasseling
Shotgun NI* Corn: (Overtop- 4 leaf or 8, drop nozzles- 12)

Grain sorghum: (Overtop- 4 leaf or 8, drop nozzles- 12)  

Spirit 4 hr Corn: Forage/Silage 40 days; Grain- 60 days (Overtop- 20 or 6 collars, drop nozzles- 24)
Steadfast 4 hr Corn: 30 days (12inches or 6 collars)
Storm 6 hr Rice: 50 days (End of tillering)

Soybeans: 50 days

Surestart NI* Corn: 85 days
Surpass/Breakfree NA** Corn: (11)
Synchrony XP 1 hr Soybeans: 60 days
Touchdown HiTech RR Soybean: 14 days with no more than 20 fl oz/A

RR Corn: 7 days with no more than 20 fl oz/A

Conventional soybean: 7 days with no more than 3.6 Qts/a

Conventional corn: 7 days

Touchdown Total NI* Corn and soybeans: 7 days
Tough 1 to 2 hr Corn: 68 days
Typhoon 4 hr Soybeans: (Before bloom)
Ultra Blazer 4 hr Rice: 50 days

Soybeans: 50 days

Valor 1 hr
Valor XLT 1 hr No information on label
Yukon 4 hr Corn: 30 days (36)

Grain sorghum: 30 days (Overtop- 8 drop nozzles 15)

*No information on label.
**Not applicable
***Label now states that rainfall soon after application may decrease effectiveness.

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