weed management. weed management tools rotation fast, uniform growing crop cultivation herbicides
TRANSCRIPT
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)