2016 Vegetable Weed Control Herbicide/ Fumigant DIVERSIFICATION - - PowerPoint PPT Presentation

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2016 Vegetable Weed Control Herbicide/ Fumigant DIVERSIFICATION - - PowerPoint PPT Presentation

Jan 20, 2023 16 likes •590 views

2016 Vegetable Weed Control Herbicide/ Fumigant DIVERSIFICATION Focus Points 1)Weed Seed Production 2)Tillage-Stale Seedbed 3)Avoiding Herbicide Injury 4)Specific Crop Programs About 3 wk after emergence = tubers Tillage can be

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2016 Vegetable Weed Control

Herbicide/ Fumigant

DIVERSIFICATION

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Focus Points 1)Weed Seed Production 2)Tillage-Stale Seedbed 3)Avoiding Herbicide Injury 4)Specific Crop Programs

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About 3 wk after emergence = tubers

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Tillage can be helpful……or harmful.

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Tillage can be helpful……Stale Seedbed.

1) Stimulation of weed seed germination can be helpful in a stale seedbed approach in crops challenged with weeds. 2) At times, at least half your weeds will emerge in the first 7-10 days after a tillage. 3) Prepare bed for planting, spray with Roundup or Gramoxone

  • r both prior to planting.

Double Knock: Spray Roundup fb Gramoxone 5-7 days later.

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No Deep Tillage Deep Turn

No Herbicide Treatment

Number of Palmer Amaranth Plants During Early

  • Season. Macon Co., Georgia 2008.*
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1) Plowing emerged weeds is an effective tool. 2) Plowing up residual herbicide….not so much. 3) If plowing, apply residual herbicide after plowing if possible.

Tillage can be helpful……Plowing.

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Avoiding Herbicide Injury

Greatly influenced by excess moisture, cold, and incorrect spray calibration.

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Seed needs to imbibe water free

  • f herbicides

Crop seeds

Herbicide

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Seed needs to imbibe water free

  • f herbicides

Crop seeds

Herbicide

Factors Reducing Injury

  • 1. High vigor seed
  • 2. Ideal plant depth
  • 3. Right rate
  • 4. Plant into moist soil
  • 5. Smart irrigation
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Roundup Preplant No Roundup

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Sandea Dissipation on Mulch

Event

1 2 3 4 5

halosulfuron retained (%)

20 40 60 80 100 % halosulfuron Dry % halosulfuron Wash off

65% 6% Work by Tim Grey

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Non-treated Sandea prior to transplant

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Herbicide Preplant Application Procedure in Plasticulture is Critical

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Lima, Snap, Southern Pea

  • 1. Start Clean: Tillage/Roundup/Gramoxon
  • 2. Treflan/Prowl preplant incorporated

Crop seeds

Herbicide

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Lima, Snap, Southern Pea

(BASE PROGRAM)

  • 1. Start Clean: Tillage/Roundup/Gramoxone
  • 2. Treflan/Prowl preplant incorporated
  • 3. Dual Magnum preemergence
  • 4. Grass herbicide as needed POST
  • 5. Dual Magnum directed while cultivating
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Lima

Sandea PRE Sandea POST Basagran Pursuit PRE

Snap Bean

Reflex PRE Reflex POST Sandea PRE Sandea POST Basagran Pursuit PRE

  • South. Pea

Basagran Pursuit PRE Pursuit POST

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Lima, Snap, Lima, Cowpea, Lima, Cowpea

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Lima, Snap, Lima, Cowpea, Lima, Cowpea

Reflex 8 oz/A + Dual Magnum 12 oz/A

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Southern Pea

Treflan PPI Treflan + Reflex PPI Reflex + NIS POST Reflex at 1 pt/A

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Bareground (most aggressive):

  • 1. Incorporate Treflan and prepare beds
  • 2. Apply Goal (add gramoxone if weeds up)
  • 3. Lightly irrigate; wait 3 days with 1 sunny day
  • 4. Transplant
  • 5. Irrigate before applying Dual Mag.
  • 6. Apply 10-12 oz of Dual Mag. topically 7-10 DAP.
  • 7. Grass herbicide as needed.

Cabbage, Broccoli, and Cauliflower (transplants)

Cultivation kills the herbicide program!!!!!!!!!!!!!!!

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Bareground (most aggressive):

  • 1. Incorporate Treflan and prepare beds
  • 2. Apply Goal (add gramoxone if weeds up)
  • 3. Lightly irrigate; wait 1 to 2 sunny days
  • 4. Transplant
  • 5. Irrigate before applying Dual Mag.
  • 6. Apply 10-12 oz of Dual Mag. topically 7-10 DAP.
  • 7. Grass herbicide as needed.

Collard (transplants)

Cultivation kills the herbicide program!!!!!!!!!!!!!!!

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  • 1. Incorporate Treflan
  • 2. Seed
  • 3. Spray 12 oz of Dual Magnum topically when 3”.
  • 4. Grass herbicide as needed.

Cabbage, Broccoli, Cauliflower, Collards (seeded)

Cultivation kills the herbicide program!!!!!!!!!!!!!!!

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  • 1. Incorporate Treflan
  • 2. Seed
  • 3. Grass herbicide as needed.

Turnips and Mustard (seeded)

Cultivation kills the herbicide program!!!!!!!!!!!!!!!

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Grower Standard + Future Product? Grower Standard (not a check!!)

Notice pigweed

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Fruiting Vegetables On Mulch

Herbicides under mulch generally don’t perform well and can be problematic (injury, carryover, etc.)

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BELL PEPPER HERBICIDE PROGRAM

Preplant under mulch Topical 7-10 d after transplant Topical as needed 1.Devrinol 2.Devrinol + Command 3.Devrinol + Reflex (Dual is labeled but can cause Stunting) Dual Magnum 10-12

  • z/A

Select Max TapOut No adjuvant needed

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REFLEX IN TOMATO/PEPPER

EXCELLENT CROP TOLERANCE; 50-70% yellow nutsedge under mulch control, excellent Pigweed control

LABELED

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REFLEX PREPLANT ON YELLOW NUTSEDGE

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No Reflex Reflex 1 pt/A applied 205 days before transplanting

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Palmer Amaranth Control With Pic Chlor 60. Tift Co., 2013.

Plus Dual Mag 12 oz/A No Herbicide

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TOMATO HERBICIDE PROGRAM

Preplant under mulch Topical 10-14 d after transplant; pre-bloom Topical as needed 1.Devrinol + Dual Mag. 2.Devrinol + metribuzin 3.Devrinol + Reflex

  • 1. Sandea 0.75 oz
  • 2. Dual Magnum
  • 1. Select Max

No adjuvant needed

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No Dual Magnum

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Dual Magnum 8

  • z/A
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Dual Magnum 12

  • z/A
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Dual Magnum 16

  • z/A
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Dual Magnum 24

  • z/A
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EGGPLANT HERBICIDE PROGRAM

Preplant under mulch No POST broadleaf

  • ption

Topical as needed Devrinol Select Max TapOut

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Control Dual Magnum

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Sinbar + Reflex + Yellow + Roundup or Gramoxone

Under mulch? Reflex/Sinbar/Sandea? Metam sodium/Pic

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Sinbar + Reflex + Yellow + Roundup or Gramoxone

Under mulch? Reflex/Sinbar/Sandea-- Metam sodium/Pic

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Other Thoughts

Sinbar: great tool except intercropping Sandea: 7 d preplant, RM Yellow: great tool, not under mulch Select Max: least injurious Rotational: Staple, Envoke, Cadre, Strongarm are often problematic

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Watermelon and Cantaloupe

  • Row middle bareground: 8 to 12 oz/A
  • Row middle mulch: 12 to 16 oz/A
  • Do not apply topically
  • Do not broadcast over mulch

2015 New Labels-Dual Magnum

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Mulched watermelon injury to Dual Magnum applied post-transplant on mulch. TyTy, 2010.

20 40 60 80 100

8 d 16 c 40 b 8 oz 12 oz 50 a 24 oz 36 oz

%

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Cantaloupe – Preplant/At Plant

Command: watch carryover Curbit: don’t put under plastic Metam: under mulch?? Sandea: 7 day preplant

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Cantaloupe – Preplant/At Plant

Sandea: POST for nutsedge Select Max: Grasses 3” or smaller Treflan: row middle

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Cantaloupe – Preplant/At Plant

Sandea: POST for nutsedge Select Max: Grasses 3” or smaller Treflan: row middle NEED NEW TOOLS!!!!!

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Squash – Last 2 years game change

Interestingly seeded squash will likely give you the best control options. Curbit + Reflex PRE Dual Magnum POST ONCE LABELED

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REFLEX - SQUASH

Bareground seed: 8 oz/A PRE + yellow Bareground transplants:

  • A. Prepare land;
  • B. Apply 8 oz Reflex
  • C. Irrigate
  • D. Punch hole and transplant
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Summer Squash (Yellow & Zucchini) Dual Magnum

Bareground seed: 8-12 oz POST after 3” Bareground transplants: 8-12 oz 10-14 DAT Mulch seed: 8-12 oz POST after 3” Mulch transplants: 8-12 oz 7-10 DAT.

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Dual Magnum and Reflex Indemnified Labels

  • 1. www.farmassist.com
  • 2. Products
  • 3. Indemnified labels
  • 4. Login (or create login and password)
  • 5. Georgia, Dual Magnum or Reflex
  • 6. Accept Waiver
  • 7. Print label
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Rye/Mulch System

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INDUSTRY

Georgia Department of Agriculture Commissioner Gary Black

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Georgia Vegetable Commodity Commission

Support for most of this work!!!!

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