Slide Presentation
TITLE
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2016 Wheat Weed Control
AUTHOR
Stanley Culpepper
Professor and Extension Weed Specialist
University of Georgia
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TABLE OF CONTENTS
2016 Wheat Weed Control
Discussion Topics
Controlling Broadleaf Weeds
Controlling Broadleaf Weeds
MCPA vs 2,4-D
Ryegrass Control in Wheat
Ryegrass Control in Wheat
Hoelon 2X rate
PowerFlex 3X rate or Osprey at 3X rate
Axial XL 2X rate
Annual Ryegrass - In Crop
Ryegrass Control in Wheat
Proper Timing of POST Materials
Ryegrass Resistant to ALL POST'S
Ryegrass planted 0.5 inch followed by deep turning
Deep turning reduces ryegrass emergence. Webster, 2014.
New Products: Zidua and Fierce (section 24 c)
Zidua- Effective on Ryegrass
Zidua- Effective on Ryegrass
UGA Data With Zidua on Ryegrass
UGA Data With Zidua on Ryegrass
Fierce (Section 24 c GA Label)
Fierce (Section 24 c GA Label)
UGA Data With Fierce on Ryegrass
UGA Data With Fierce on Radish
Summary
SLIDE CONTENTS
Treated Untreated 2016 Wheat Weed Control A. Stanley Culpepper University of Georgia Tifton, GA
1. Review traditional control methods 2. Discuss new approaches Discussion Topics 1. Broadleaf control 2. Ryegrass control
Controlling Broadleaf Weeds 1. Harmony Extra fb MCPA or 2,4-D 2. Harmony Extra + MCPA or 2,4-D 3. 2,4-D alone 4. MCPA alone 5. Harmony Extra alone Most effective program Least effective program
Controlling Broadleaf Weeds 1. Harmony fb MCPA or 2,4-D 2. Harmony TS + MCPA or 2,4-D 3. 2,4-D alone 4. MCPA alone 5. Harmony Extra alone Most effective program Least effective program
CROP RESPONSE: MCPA: 2 tiller to full tiller wheat 2,4-D: full tiller wheat WEED RESPONSE: Similar on small weeds; 2,4-D better on larger weeds. Both outstanding on radish. MCPA vs 2,4-D
Ryegrass Control in Wheat 1. A genetic stud– will develop resistance to ALL herbicides more quickly than any other known plant. 2. Extremely competitive with grain production. 3. Great options available ……….
Ryegrass Control in Wheat IF YOU DON’T HAVE RESISTANCE 1. A genetic stud– will develop resistance to ALL herbicides more quickly than any other known plant 2. Extremely competitive with grain production. 3. Great options available ……….
Non-treated control Hoelon 2X rate
Non-treated control PowerFlex 3X rate or Osprey at 3X rate
Non-treated control Axial XL 2X rate
Annual Ryegrass – In Crop ACCase Inhibition Holeon Axial ALS Inhibition Osprey PowerFlex PSII and VLCFA Axiom Inhibit Microtubule Prowl
Efforts underway to understand impacts of deep turning. Ryegrass Resistant to ALL POST’S
Ryegrass planted 0.5 inch without tillage. Ryegrass planted 0.5 inch followed by deep turning.
Deep turning reduces ryegrass emergence. Webster, 2014. Control Deep Turn Ryegrass was planted with a grain drill at a depth of 0.5 inch followed by no tillage (control) or by deep turning seeds 10 to 12 inches deep. Plant/A are the number of plants that emerged by late-season. 809,000 Plant/A 1210 Plant/A
Efforts underway to understand impacts of deep turning. New products: Zidua Fierce (section 24 c) Ryegrass Resistant to ALL POST’S
Outstanding residual ryegrass control! Suppression of few broadleaf weeds. Zidua: Effective on Ryegrass If Zidua is activated prior to ryegrass emergence, excellent control expected! If ryegrass is up when applied then control of emerged plants not likely.
Delayed preemergence: Seed planted at least 0.75” deep 80% of seed germinated with 0.5” shoot 0.75 to 1 oz (sands); 1 to 1.25 oz (med texture) Zidua: Effective on Ryegrass Early POST (spike through 4-tiller): Seed planted at least 0.5” deep 1 to 2 oz/A
UGA Data With Zidua on Ryegrass W2-11; W3-11; W14-11; W5-12; W13-12, W1-13
UGA Data With Zidua on Ryegrass W2-11; W3-11; W14-11; W5-12; W13-12, W1-13 W11-12; W14-12; W1-12; W7-12; W8-12; W1-13; W2-13; W7-13
Good ryegrass & I think broadleaf control! Must walk slowly with injury concerns. Fierce (Section 24 c GA Label)
Outstanding ryegrass & I think broadleaf control! Must walk slowly with injury concerns. Fierce (Section 24 c GA Label) Application between spike and 2 lf wheat: Seed planted between 1 and 1.5 inch deep Apply at 1.5 oz/A Do not apply on sands!!!! Do not mix with anything but water!!! MUST BE ACTIVATED PRIOR TO WEEDS ˝”
UGA Data With Fierce on Ryegrass W7-12; W8-12; W3-13; W4-13; W7-13; W11-13 Residual component must be activated for acceptable control. (100 vs 71)
UGA Data With Fierce on Radish Residual component must be activated for acceptable control. W3-13; W4-13; W7-13; W11-13
Summary 1. Great options for broadleaves Using same herbicide MOA on a piece of ground guarantees resistance in 3 yr Walk slowly with Fierce! Do not treat the same ground 2 years in a row with Fierce or Zidua!