WEED MANAGEMENT ISSUES

Slides:



Advertisements
Similar presentations
Managing Tropic Croton with Cadre/Ultra Blazer Tank-Mixes in Peanut E. P. Prostko and J. A. Kichler Dept. of Crop & Soil Sciences University of Georgia.
Advertisements

Verdict Herbicide Preemergence in Corn Stronger and Simple 2010 Field Performance Verdict (13 fl oz/A)Lumax ® (1.5 qts/A)Corvus (3 oz/A) University of.
Peanut Weed Control Update 2004 Eric P. Prostko Extension Weed Specialist.
2009 Weed Management in Cotton. Getting Serious About Herbicide-Resistant Weeds.
Herbicide Resistance. Discussion Topics What is resistance? What causes resistance?
Weed Control in Carrot PNVA, Pasco
Peanut Response to Warrant (Acetochlor) E.P. Prostko*, T.L. Grey, and D.L. Jordan.
Response of Glyphosate-Resistant Palmer Amaranth to Thirteen Residual Herbicides Jeremy Kichler.
2010 Corn Herbicide Update Brian Jones Agronomy Extension Agent
Weed Management in Strawberry Katie Jennings North Carolina State University Dept. of Horticultural Science.
Weed Control Update For Grain Crops J. R. Martin & J. D. Green Extension Weed Science Plant & Soil Sciences University of Kentucky.
It’s Time for Glyphosate Stewardship Can PSEP Help? Chris Boerboom Extension Weed Scientist University of Wisconsin-Madison.
TECHNICAL NOTE: – AGRONOMY – OH-1 Controlling Kochia and Palmer Amaranth in Warm Season Grass Stands and in Cropland. United States Department of Agriculture.
Using The Herbicide Classification Chart
Post emergence soybean lync training Jim Martin. Duration of Weed Competition Common Guidelines  Corn  Remove at 2-4” weeds  Soybean  Remove at 6-8”
Weed Control in Carrot 2007 Ontario Muck Growers Conference Bradford, Ontario March 21, 2007 Bernard Zandstra Michigan State University.
Weed Control in Sweet Corn 2007 Bernard H. Zandstra Michigan State University.
Eric P. Prostko, Ph.D. Professor and Extension Weed Specialist Dept. Crop & Soil Sciences Whole-Farm Weed Management Practices For Palmer Amaranth Control.
Peanut Weed Control Update (County Extension Agents) Eric P. Prostko Professor and Extension Weed Specialist Department of Crop & Soil Sciences.
Weed Management in Brassica and Other Oilseed Crops Joe Yenish Extension Weed Scientist Washington State University.
Increasing Feed Grain Production in North Carolina Wesley Everman Extension Weed Specialist Department of Crop Science.
HAS ROUNDUP READY FLEX MISSED PRIME TIME IN GA?. planting harvest 4 leafLayby60% open bolls Roundup Ready ® Flex Cotton In-season; emergence to 60% open.
Dr. Eric P. Prostko Extension Weed Specialist Dept. Crop & Soil Sciences University of Georgia December Weed Control Update (Peanut, Field Corn,
Evaluating Chemical Fallow Herbicides for Potential use in Controlling Glyphosate Resistant Kochia Fabian Menalled & Ed Davis December, 2012.
Taproot of Palmer Amaranth Allen 2009 Living with Palmer amaranth in Georgia cotton.
Herbicide Product Update January 9, 2008 Ed Davis.
New Developments in Field Crop Weed Control (corn, soybean, peanut, sorghum) Eric P. Prostko Extension Weed Specialists Department of Crop & Soil Sciences.
Glyphosate-Resistant Palmer Amaranth Has the Potential to Devastate Georgia Agriculture A. Stanley Culpepper University of Georgia Tifton Campus.
Herbicide Resistant Weeds and Their Management Eric P. Prostko and A. Stanley Culpepper Extension Weed Specialists The University of Georgia Updated October.
Economics of Roundup Ready Crops: Farmer Benefits and the Impact of Weed Resistance Paul D. Mitchell Ag & Applied Economics, UW-Madison Wisconsin Crop.
Glyphosate Resistant Weeds Got Questions? We’ve Got Answers 1.Are glyphosate resistant weeds real? YES.
Herbicide-Resistant Weeds: A Dilemma in Dixie Culpepper, York, Steckel, Prostko.
Managing glyphosate-resistant Palmer amaranth in Liberty Link ® cotton. A.W. MacRae 1, A.S. Culpepper 1, and J.M. Kichler 2 1 Crop and Soil Sciences Department.
The current state of herbicidal weed control Micheal D. K. Owen Iowa State University Ames, IA USA
Diversity and Integration: Keys to Surviving in a Palmer World Stanley Culpepper, University of Georgia, Tifton.
2011 Glyphosate-Resistant Palmer Amaranth Management in Cotton Culpepper, Steckel, York.
2012 Cotton Production Meeting Stanley Culpepper, University of Georgia, Tifton.
2007 Peanut Weed Management Update for County Agents Eric P. Prostko Extension Weed Specialist Department of Crop & Soil Sciences The University of Georgia.
2014: Herbicide Resistance Changes Agriculture Forever Stanley Culpepper Tifton, GA.
Soybean Weed Control Eric P. Prostko Extension Weed Specialist Department of Soil & Crop Science The University of Georgia.
Know how. Know now. Managing Agronomic Input Costs Nathan Mueller UNL Extension Educator – Cropping Systems and Ag Technologies
Weed Control Research in Southwest North Dakota Caleb Dalley Hettinger Research Extension Center.
Eric P. Prostko, Ph.D. Extension Weed Specialist Dept. Crop & Soil Sciences 2012 Weed Management Update Field Corn and Grain Sorghum.
Peanut Weed Control Update 2010 (County Extension Agents) Eric P. Prostko Extension Weed Specialist Department of Crop & Soil Sciences The University of.
Soybean Weed Control for New Agents Eric P. Prostko Professor and Extension Weed Specialist Dept. Crop & Soil Sciences.
Field Corn Weed Management Update
2017 Field Corn Weed Management Update
Developing An Herbicide-Resistant Weed Management Plan
2015 Soybean Weed Control Update
Weed Shifts in RR Crops Two types of shifts
2008 Soybean Weed Control Update
RR Cotton Tolerance to Glyphosate and Managing Difficult to Control Weeds A. Stanley Culpepper.
Perplexing Pigweed Problems in 2004
Managing ALS-Resistant Palmer Amaranth in Peanuts
GRAIN SORGHUM WEED CONTROL UPDATE – 2017
Culpepper, York, Kichler, MacRae
Palmer Amaranth Most Troublesome Weed in US
Culpepper, York, Kichler, MacRae
Peanut Weed Control: Are We Out of Silver Bullets?
Herbicide Resistance: Protecting the PPO’s
GRAIN SORGHUM WEED CONTROL UPDATE – 2018
Evaluation of Acuron as a new Herbicide for Weed Control in Corn
Micheal D. K. Owen Iowa State University Ames, IA USA
Yield Protecting Soybean Herbicide!
Management Systems for Glyphosate-Resistant Palmer Amaranth
Weed Control in Strip-Tillage Peanuts
What’s Happening in Weed Control 2001
2018 Sweet Corn Weed Control
Eric P. Prostko Extension Weed Specialist
2011 Cotton County Weed Meetings
Presentation transcript:

WEED MANAGEMENT ISSUES Pigweeds Marestail Control Volunteer Corn Herbicide Update

Turn Out the Lights - The Party’s Over Aaron G. Hager Department of Crop Sciences University of Illinois

? Lyrics Turn out the lights, the party’s over They say that all good things must end Let’s call it a night the party’s over And tomorrow starts the same old thing again ?

Waterhemp Spp. Common Waterhemp (Amaranthus rudis) Tall Waterhemp (Amaranthus tuberculatus)

Waterhemp Spp. Source: Dr. Aaron Hager, Univ of IL

Palmer Amaranth

Palmer Amaranth in Fulton County - 2009 Dr. Bill Witt Cam Kenimer

Vegetative Characteristics of Pigweeds In KY SPECIES CHARACTERISTICS Smooth Pigweed Hairy stems Redroot Pigweed Waterhemp Smooth stems Leaves long, narrow, & waxy Palmer Amaranth Smooth stems, Long petioles Symmetrical leaf arrangement Spiny Amaranth Spines at leaf nodes

Reproductive Characteristics of Pigweeds In KY SPECIES CHARACTERISTICS OF FLOWERING BRANCHES MONOECIOUS Smooth Pigweed Compact short, slender & somewhat prickly Redroot Pigweed Compact short & prickly Spiny Amaranth Male flowers top of plants & female flowers at bottom & middle of plants DIOECIOUS Waterhemp spp. Long, slender, & smooth Palmer Amaranth Very long (males smooth / females prickly)

COMPARASION OF FLOWERING STRUCTURES

WATERHEMP & PALMER AMARANTH BIOLOGY CREATE CHALLENGES FOR SOYBEAN GROWERS Prolific seed producers. Seed scattered with combines. Dioecious (male & female plants). Pollen flow contributes to dispersal. Multiple events of plant emergence throughout the season. Palmer grows rapidly and difficult to control: 3” tall with Flexstar 5” to 6” tall for Ignite in LL soybean.

TYPES OF HERBICIDE RESISTANCE IN MAJOR PIGWEED SPECIES IN THE US MODE/SITE OF ACTION SMOOTH PIGWEED WATERHEMP SPP PALMER AMARANTH ALS X GLYCINE - PS II DNA ALS + GLYCINE ALS + PS II ALS + PPO ALS + PS II + PPO ALS + PPO + GLYCINE X = Resistance has been documented. Most of these confirmed based on criteria in International Survey of Herbicide Resistant Weeds (11-07-09)

HERBICIDE OPTIONS FOR WATERHEMP CONTROL IN SOYBEAN SOIL APPLIED POSTEMERGENCE Authority Assist Authority First / Sonic Authority MTZ Boundary Envive Gangster Linex Prefix Spartan Valor Sx / Encompass Valor XLT Cobra Flexstar Reflex Ultra Blazer

HERBICIDE OPTIONS FOR WATERHEMP CONTROL IN SOYBEANS SOIL APPLIED Authority Assist Authority First / Sonic Authority MTZ Boundary Envive Gangster Linen Prefix Spartan Valor Sx / Encompass Valor XLT POSTEMERGENCE Cobra Flexstar Reflex Ultra Blazer

HERBICIDE OPTIONS FOR PALMER AMARANTH CONTROL IN SOYBEANS SOIL APPLIED Dual Intrro Prefix Prowl Sencor Treflan Authority First/Sonic Authority MTZ Valor Sx / Encompass Valor XLT > POSTEMERGENCE Cobra Flexstar Ultra Blazer Ignite in LL soybeans >

Burndown Control of Marestail 2,4-D ester Sharpen Optill Ignite

VOLUNTEER CORN IS A WEED Corn yield reduced 42 to 60 % due to interference from volunteer corn plants (Source Univ. of Illinois) 1 Volunteer Corn Clump/8 ft2 Reduces Soybean Yield 25% Source: Becket & Stoller 1988 UK Weed Sci

Herbicide Options for Controlling Unwanted Corn Plants Prior to Planting Field Corn Approx. Cost/A Previous Corn Hybrid Conventional Hybrid Roundup Ready Liberty Link Clearfield IMI-Corn Glyphosate $ 4 - 15/A ++ X Paraquat + Photo System II Inhibitor (e.g.. Atrazine, Linex, Metribuzin) $ 11 - 22/A + Select MAX * $9/A + = Recommended ++ = Highly recommended X = No control * SELECT MAX Replant no sooner than 6 days after application UK Weed Sci

Soybean Herbicides Labeled For Controlling Volunteer Corn Postemergence Herbicide Cost/A* Max Corn Height Arrow (4-6 oz/A $ 4.50 – 7.0/A 4” to 12” Assure II (4 to 8 oz/A) $ 4.50 – 8.75/A 18” to 30” Fusion (4 to 6 oz/A) $ 5.25 - 7.75/A 24” Poast (0.75 pt/A) $ 6.75/A 20” Select Max,etc (6 / 9 / 12 oz/A) $ 6.25- 12.50/A (12”) (24”) (36”) ** Glyphosate (0.56 to 10.75 lbae/A) $ 2.50 - 7.75/A 12” to 20” ** Sequence (2.5 pt/A) $?/A 18” * Price does not include cost of application or adjuvants * * Will not Control Glyphosate -Tolerant Volunteer Corn. UK Weed Sci

Corn Herbicide Update Sharpen (saflufenacil) * Integrity (saflufenacil + dimethenamide) * Corvus (isoxaflutol + thiencarbazone) Accent Q (nicosulfuron + safener) Steadfast Q (nicosulfuron + rimsulfuron + safener) Valor (14-Day EPP) * Kixor technology

Soybean Herbicide Update Sharpen (saflufenacil) * Optill (saflufenacil + imazethapyr) * Envive (chlorimuron + thifensulfuron + flumioxazin) Ignite 280 (glfosinate ) Burndown & Post in LL soybean * Kixor technology

Wheat Herbicide Update PowerFlex (pyroxsulam)