Weed Management

Weed Management Tools

• Rotation

• Fast, uniform growing crop

• Cultivation

• Herbicides

Herbicide Usage

Herbicide % of Acres None 8

Spartan (Charge) 39 Command 46

Prowl 26 Tillam 3

Devrinol 9 Poast Aim

15 5?

Prowl 3.3E

• Common name: Pendimethalin, • Dinitroaniline, prevents separation of

chromosomes during mitosis– similar to Balan, Surflan, Treflan, Prime +

• Rate: 1.8 - 2.4 pts (1.5 pts)• Application: PPI and Layby (directed)

– should be incorporated for max. control

• annual broadleaf weeds and grasses

Prowl 3.3E

• Can cause injury to tobacco

• Stunted and club-like roots– more of a problem on sandy soils– poor incorporation– high rate

• If used with Spartan: Prowl PPI, Spartan PRE-T

Poast 1.5EC

• Common name: Sethoxydim, BASF• Inhibits ACCase, blocks building of new

membranes– similar to Select and Achieve

• Rate: 1-1.5 pts – 2 pts crop oil or 1 pt DASH

• Application: POST over-top– 42 d prior to harvest

• Annual and perennial grass control

Poast 1.5EC

• Applied to actively growing weeds

• Up to 42 before harvest

• One of two remedial control herbicides labeled on tobacco

• Phyto possible on tender tobacco because of adjuvant

Tillam 6E• Common name: Pebulate• Thiocarbamate, inhibits biosynthesis of lipids,

proteins, fatty acids, etc.– weeds fail to emerge– similar to Sutan, Bolero, Vernam

• Rate: 2.7 qts• Application: PPI• annual grasses, some broadleaf weeds

– some nutsedge suppression

Tillam 6E

• Breakdown in control (grasses) during the season is not unusual

• Can cause stunting– uneven growth, restricted root growth

Devrinol 50DF

• Common name: Napropramide

• Acetamide: Inhibits cell division– somewhat similar to Lasso, Frontier, and Dual

• Rate: 2 - 4 lbs

• Application: PPI, POST-OT and Layby

• annual grasses and some broadleaf weeds

• Rotation restriction with small grain

Devrinol 50DF

• Breakdown in control (grasses) during the season is not unusual

• Can cause stunting– uneven growth, restricted root growth

Command 3ME

• Common Name: Command, FMC• Carotenoid Biosynthesis Inhibitor, weeds emerge,

but are bleached white and die within several days– Loosely similar to Zorial, Sonar and Amitrol

• Rate: 2 - 2.67 pts• Application Timing: PRE-T, PPI, and POST-T

(overtop within 7 days)• Annual broadleaf and grass weeds

Command 3ME

• Rotation restrictions:– 12 months for small grains and vegetables

• High drift potential• Do not apply:

– Winds over 10 mph– Over 30 PSI– Within 1,200 ft of non-target sensitive plants

• ornamentals, vegetables etc.

AimShielded or Hooded Spray Prior to LaybyDirected After First Harvest

Some small broadleaf weedsPigweed and Morningglory

Common Name: CarfentrazonePROTOX Inhibitor, Cell membranes leak

Spartan 4F• Common name: Spartan, FMC• Aryl Triazinone, PROTOX inhibitor, cell

membranes begin to leak– similar to Blazer, Reflex and Goal

• Rate: 8.0 - 12.0 ounces• Application: PRE-T and PPI• Broadleaf weeds and sedges

– some grass suppression

Spartan 4F

• 18 month rotation restriction on cotton • For adequate grass control, grass herbicide

must also be used• Can cause stunting especially when

incorporated• Weed control reduced from PRE-T in dry

years• “Reach-back” potential is high

Cotton

Tobacco

Distribution of Cotton and Tobacco Acreage

Spartan

• Can be applied PPI or PRE-T

• PPI– Can injure tobacco

• PRE-T– Not convenient for growers

Spartan Charge

• Aim/Spartan PreMix

• No need for Aim Pre Tobacco Production

• Check the label for equivalent rates of Spartan 4F

Aminopyralid

• Forefront

• Milestone

• Auxin Mimic

• Drift

• Carryover

Ignite(1/32nd full rate)

Ignite (1/16th full rate)

Ignite (1/8th full rate)

Ignite(1/4 full rate)

Ignite (1/2 full rate)

Dicamba (1/512th full rate)

Dicamba (1/128th full rate)

Dicamba (1/32nd full rate)

Dicamba (1/8th full rate)

Dicamba (1/2 full rate)

2,4-D (1/512th full rate)

2,4-D (1/128th full rate)

2,4-D (1/32nd full rate)

2,4-D (1/8th full rate)

2,4-D (1/2 full rate)