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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

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Weed management issues

WEED MANAGEMENT ISSUES

Pigweeds

Marestail Control

Volunteer Corn

Herbicide Update


Turn out the lights the party s over

Turn Out the Lights -The Party’s Over

Aaron G. Hager

Department of Crop Sciences

University of Illinois


Lyrics
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
Waterhemp Spp.

  • Common Waterhemp (Amaranthus rudis)

  • Tall Waterhemp (Amaranthus tuberculatus)


Waterhemp spp1
Waterhemp Spp.

Source: Dr. Aaron Hager, Univ of IL



Palmer Amaranth in Fulton County - 2009

Dr. Bill Witt

Cam Kenimer





Waterhemp palmer amaranth biology create challenges for soybean growers
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
TYPES OF HERBICIDE RESISTANCE IN MAJOR PIGWEED SPECIES IN THE US

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
HERBICIDE OPTIONS FOR WATERHEMP CONTROL IN SOYBEAN THE US

  • Authority Assist

  • Authority First / Sonic

  • Authority MTZ

  • Boundary

  • Envive

  • Gangster

  • Linex

  • Prefix

  • Spartan

  • Valor Sx / Encompass

  • Valor XLT

  • Cobra

  • Flexstar

  • Reflex

  • Ultra Blazer

SOIL APPLIED

POSTEMERGENCE


Herbicide options for waterhemp control in soybeans
HERBICIDE OPTIONS FOR WATERHEMP CONTROL IN SOYBEANS THE US

SOIL APPLIED

  • Linen

  • Prefix

  • Spartan

  • Valor Sx / Encompass

  • Valor XLT

  • Authority Assist

  • Authority First / Sonic

  • Authority MTZ

  • Boundary

  • Envive

  • Gangster

POSTEMERGENCE

  • Cobra

  • Flexstar

  • Reflex

  • Ultra Blazer


Herbicide options for palmer amaranth control in soybeans
HERBICIDE OPTIONS FOR PALMER AMARANTH THE USCONTROL IN SOYBEANS

SOIL APPLIED

  • Authority First/Sonic

  • Authority MTZ

  • Valor Sx / Encompass

  • Valor XLT

  • Dual

  • Intrro

  • Prefix

  • Prowl

  • Sencor

  • Treflan

>

POSTEMERGENCE

  • Cobra

  • Flexstar

  • Ultra Blazer

  • Ignite in LL soybeans

>


Burndown control of marestail

Burndown Control of Marestail THE US

2,4-D ester

Sharpen

Optill

Ignite


VOLUNTEER CORN IS A WEED THE US

1 Volunteer Corn Clump/8 ft2

  • Reduces Soybean Yield 25% Source: Becket & Stoller 1988

Corn yield reduced 42 to 60 % due to interference from volunteer corn plants

(Source Univ. of Illinois)

UKWeed Sci


Herbicide options for controlling unwanted corn plants prior to planting field corn
Herbicide Options for Controlling Unwanted Corn Plants Prior to Planting Field Corn

* SELECT MAX Replant no sooner than 6 days after application

UK Weed Sci


Soybean herbicides labeled for controlling volunteer corn
Soybean Herbicides Labeled For Controlling Volunteer Corn to Planting Field Corn

* Price does not include cost of application or adjuvants

* * Will not Control Glyphosate -Tolerant Volunteer Corn.

UKWeed Sci


Corn herbicide update
Corn Herbicide Update to Planting Field Corn

  • 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
Soybean Herbicide Update to Planting Field Corn

  • Sharpen (saflufenacil) *

  • Optill (saflufenacil + imazethapyr) *

  • Envive (chlorimuron + thifensulfuron + flumioxazin)

  • Ignite 280 (glfosinate ) Burndown & Post in LL soybean

* Kixor technology


Wheat herbicide update
Wheat Herbicide Update to Planting Field Corn

  • PowerFlex (pyroxsulam)


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