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Weed Management Guide

CORN SOYBEANS Cereals

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Weed Management Guide CORN | SOYBEANS | Cereals I put this weed management guide together for Country Guide because I have noticed a change in some of the weed species commonly found in corn, soybean and cereal fields. There has also been a tremendous amount of research conducted by the University of Guelph (specifically, Dr. Peter Sikkema, University of Guelph – Ridgetown Campus) that sheds light on how to manage certain “problem weeds.” The presence of problem weeds, herbicide-resistant weeds (specifically glyphosate) and the entry of new herbicide-tolerant crop technologies makes it more challenging to select products for your farm operation. It was clear to me that it was time to change the way that we present weed management information to you. This insert provides an opportunity to construct weed control rating charts that better reflect the types of weed management challenges found in field crops throughout the season. Is it perfect? Probably not, but that is the goal, to make it a perfect resource for you. I would value any constructive suggestions that you have.

Mike Cowbrough Weed Management Program Lead, Field Crops Ministry of Agriculture and Food, Ministry of Rural Affairs 519-824-4120 Ext. 52580

SPECIAL SUPPLEMENT Weed Management Guide 2015

Table of contents CORN pg 6-13

SOYBEANS pg 14 -17

Cereals pg 18 & 19

Expert value In today’s ag, expert farmers farm with experts. In other words, the job starts with choosing the right experts, like Mike Cowbrough by tom button True expertise is invaluable. To a degree, of course, we can assign a dollar value to some aspects of it. If Mike Cowbrough’s ratings on the following pages help you select a herbicide treatment that can get your job done for less money, then that is part of the value of his expertise. And while it will be harder to calculate, it’s also part of his expert value if his recommendations help you select a treatment that gives you a higher yield. Harder to put a dollar value on, however, are aspects related to risk management, on the one hand, and management confidence on the other. Nevertheless, there can be doubt in the world of farming in 2015, risk management and management confidence are essential for success. To achieve this, Mike cultivates his expertise by not only from being up to the minute scientifically, and by being plugged into North America’s top weed control networks, but also by maintaining his connections with what’s actually going on in farm fields. At Country Guide, production editor Ralph Pearce and I are proud to bring you this special weed control insert, prepared by Mike for you to use. And with it, let us wish you the best in the 2015 growing season. Just imagine if consumers really understood how productive you are at producing the food that keeps them going. Thanks Mike!

Tom Button, Editor, Country Guide tom.button@fbcpublishing.com

Weed Management Guide 2015

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Table 1. Weed control ratings for pre-plant burndown treatments in corn

Witchgrass

Azuki bean, volunteer

Atriplex, spreading

Buckwheat, wild

Burcucumber

Burdock (2nd year)

Broadleaf plantain

Canola, volunteer (RR)

Carrot, wild

Chickweed

Dandelion

Fleabane, Canada

Glyphosate (3X rate)

All

Clover, red

Sandbur

All

Alfalfa, volunteer

Quackgrass

All

Bluegrass, annual

Glyphosate (2X rate)

Tolerant hybrids

Glyphosate (1X rate)

Herbicide Treatment

Mode of action

Foxtails

Weed species typically found at time of burndown

Glyphosate: Emerged weed control ratings at 4 weeks after application

Tank-mix partners with glyphosate (1X rate): Weed control ratings at 8 weeks after application – in other words “If I add a herbicide to glyphosate, will it improve 2,4-D ester 700

9,4

All

Aatrex 480

9,5

All

Banvel II, Hawkeye or Oracle + 2,4-D

9,4,4

All

Banvel II, Hawkeye or Oracle + Aatrex 480

9,4,5

All

Battalion Co-pack (Elim EP + Dual II Magnum + Banvel II)

9,2,15,4

All

9,2

All

Callisto + Aatrex 480

9,27,5

All

Converge XT Co-pack (Converge Flexx + Converge 480)

9,27,5

All

Broadstrike RC

Eragon + Merge

8 <5

9 8

<5 9

9,14

All

Engarde Co-pack (Elim EP + Callisto)

9,2,27

All

Focus Co-pack (Pyroxasulfone 85 + Aim EC)

9,15,14

All

Integrity

9,15,14

All

Lumax EZ

9,15,5,27

All

Marksman

9,4,5

All

Prowl H2O

9,6

All

8 5

9 9

8 <5

9 8 6 8

9 5

9 6

Herbicides and Co-packs that contain glyphosate: Emerged weed control ratings at 4 weeks after application Enlist Duo (Low Rate)

4,9

All

Enlist Duo (High Rate)

4,9

All

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Weed Management Guide CORN | SOYBEANS | Cereals

Horsenettle

Horsetail, field

Lettuce, prickly

Lamb’s-quarters

Mustards

Pigweed

Ragweed, common

Ragweed, giant

Violet (pre flower)

Vetch

Waterhemp

N.I.

9 6

Pineappleweed

Flower-of-an-hour

Three-seeded mercury

(Annual, biennial or perennial listed in alphabetical order)

control of the target weeds” 8

1,2

8 61,2

9 9

6 9

Corn Table 1

9 9

Top growth burnoff only, regrowth will occur. The addition of Merge at 0.4 l/ac. is required to achieve this level of control. Two applications will be required to achieve this level of control throughout the season. R Populations of this weed exist in Ontario that are resistant to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Tolerant Hyrbid Abbreviations

1,2

5 9

61,2 91

All = This treatment can be applied to any corn hybrid. RR = This treatment can only be applied to “Roundup Ready” corn hybrids. LL = This treatment can only be applied to “Liberty Link” corn hybrids. EN = This treatment can only be applied to “Enlist” corn hybrids.

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Table 2. Weed control ratings for pre-emergent herbicide treatments in corn (Weeds are not emerged at the time of application) Beggarsticks, nodding

Buckwheat, wild

Bur-cucumber

Chickweed

Cocklebur

Banvel II, Hawkeye or Oracle + Aatrex 480

4,5

Yes

All

Witchgrass <5

Sandbur <5

Proso millet <5

Foxtails <5

Fall panicum <5

Crabgrass <5

Barnyard grass <5

Crop tolerance E

All

Tolerant hybrids All

Yes

Field corn Yes

Seed corn

Banvel II, Hawkeye or Oracle

Sweet corn

Aatrex 480

Herbicide Treatment

Mode of action

Atriplex, spreading

Broadleaf weeds

Wild oats

Grassy weeds (Annual)

Pre-emergence Herbicides and Co-packs: Weed control ratings at 8 weeks after application (Weed species not emerged at time of application)

Battalion Co-pack (Elim EP + Dual II Magnum + Banvel II) Broadstrike RC

Yes

2,15,4

Yes

All

Yes

All

Yes

All

Yes

All

Yes

All

0 <5

Callisto + Aatrex 480

27,5

Converge XT Co-pack (Converge Flexx + Converge 480)

27,5

Dual II Magnum

Yes Yes

Engarde Co-pack (Elim EP + Callisto)

2,27

Yes

All

Focus Co-pack (Pyroxasulfone 85 + Aim EC)

15,14

Yes

All

Yes

All

Yes

All

Yes

All

Yes

All

Yes

All

Yes

All

Yes

All

Frontier Max

Yes

Integrity

15,14

Yes

Lumax EZ

15,5,27

Yes

Marksman

4,5

Prowl H2O

Princep Nine-T, Simadex or Simazine

Yes

15,5

Yes

Primextra II Magnum

Yes

Weed Management Guide CORN | SOYBEANS | Cereals

Jimsonweed

Lady’s thumb

Lamb’s-quarters

Nightshade

Pigweeds

Ragweed, common

Ragweed, giant

Three-seeded mercury

Velvetleaf

Waterhemp

< 5R

Mustards

Flower-of-an-hour

Lettuce, prickly

Fleabane, Canada

(Annual, winter annual)

Corn Table 2

The highest labelled rate is required to achive this level of control. The addition of Callisto or Callisto + Aatrex will improve control of this species. R Populations of this weed exist in Ontario that are resistant to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Tolerant Hyrbid Abbreviations

Give those weeds something to fear with the longer lasting residual weed control of Focus herbicide. Focus is a pre-plant/pre-emergence group-15 herbicide that offers longer residual activity on both grassy and broadleaf weeds – even those resistant to other groups. Since Focus is registered in both corn and soybeans, you’ll enjoy maximum application flexibility, helping you move from field to field with ease. www.fmccrop.ca

Table 3. Emerged annual grass and broadleaf weed control ratings for post-emergent herbicides in corn atriplex, spreading

beggarsticks, nodding

biennial wormwood

buckwheat, wild

bur-cucumber

NC NC <5 9 NC <5 NC 9 NC NC 9 NC 91 9 91 7 91 NC 91 <5 NC 9 NC NC NC 9 81 NC 9

7 NI <5 NI 6 7 <5 6 <5 5 7 7 NI NI NI <5 8 <5 9 7 7 NI 7 6 NI <5 NI NI NI

NI NI NI NI NI NI 9 NI NI NI NI NI <5 NI <5 NI NI NI NI NI NI NI NI NI NI NI NI NI NI

NI NI 9 NI 9 9 7 9 NI NI NI 9 NC NI NC NI NI NI NI 9 NI NI 9 9 NI NI NI NI NI

<5 <5 9 NC 9 9 7 9 9 8 8 9 <5 9 <5 8 9 9 9 9 <5 9 9 NI NI 9 NI 8 NC

NI NI 5 NI <5 6 NI <5 NI <5 5 <5 NC NI NI NI NI 6 NI 6 NI 5 8 7 6-7 5 NI NI NI

9 9 9 NC NI NI NI 9 NI 9 9 5 9 9 9 83 9 9 NI NI

chickweed

witchgrass

wild oats

sandbur

proso millet

foxtails

fall panicum

crabgrass

Barnyard grass

Crop tolerance

Tolerant hybrids

Field corn

Seed corn

Sweet corn

Herbicide Treatment

Mode of action

Grassy weeds (Annual)

Post-Emergent Treatments for “All” Field Corn Hyrbids – Emerged weed control ratings at 4-6 weeks after application 2,4-D 2,4-DB Aatrex 480 + Crop Oil Accent Banvel II, Hawkeye or Oracle Banvel II, Hawkeye or Oracle + Aatrex 480 Basagran Forté Battalion Co-pack Buctril M, Badge, Mextrol or Logic M Callisto + Aatrex 480 Converge XT co-pack Distinct Dual II Magnum Engarde Co-pack Frontier Max Impact or Armezon + Aatrex 480 Integrity Laddok Lumax EZ Marksman MCPA Option + Aatrex 480 Pardner, Bromotril, Brotex or Koril + Aatrex 480 Peak Permit Primextra II Magnum Prowl H2O Tropottox Plus, Clovitox Plus or Topside Ultim

4 4 5 2 4 4,5 5 2,15,4 4 27,5 27,5 19,4 15 2.27 15 27,5 15,14 6,5 15,5,27 4,5 4 2 6,5 2 2 15,5 6,5 4 2

Yes Yes

Yes

Yes Yes

Yes

Yes Yes Yes Yes Yes

Yes Yes

Yes

Yes Yes Yes Yes

Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

All All All All All All All All All All All All All All All All All All All All All All All All All All All All All

F F E E G G G G P E E G E E E E E E E G P G E E G E E G G

NC NC <5 9 NC <5 NC 9 NC NC 9 NC 91 9 91 7 91 NC 91 <5 NC 9 NC NC NC 9 81 NC 9

NC NC NC 72 NC NC NC 8 NC 82 9 NC 81 8 81 72 81 NC 81 NC NC 72 NC NC NC 83 81 NC 72

NC NC NC 9 NC NC NC 9 NC NC 9 NC 81 9 81 7 81 NC 81 NC NC 9 NC NC NC 8 81 NC 9

NC NC <5 9R NC <5 NC 9 NC NC 9 NC 91 9 91 7 91 NC 91 <5 NC 9R NC NC NC 9 81 NC 9R

NC NC <5 9 NC <5 NC 9 NC NC 8 NC <5 9 <5 7 <5 NC <5 <5 NC 9 NC NC NC <5 <5 NC 9

NC NC NI 8 NC NI NC 9 NC NC 7 NC 61 8 61 NI NI NC NI NI NC 9 NC NC NC 7 81 NC 9

NC NC 9 9 NC NI NC 9 NC NI 9 NC NI 9 NI NI NI NI NI NI NC 9 NI NC NI NI NI NI 9

<5 <5 9 NI 9 9 NI 9

Post-Emergent Treatments for “Roundup Ready” Corn Hybrids – Weed control ratings at 4 weeks after application Glyphosate 1X rate

Yes

7/8

Glyphosate 2X rate

Yes

Post-Emergent Herbicides and co-packs containing glyphosate for “Roundup Ready” Corn Hybrids – Weed control ratings at 8 weeks after application Galaxy 2 co-pack (Ultim + Polaris) Halex GT + Aatrex 480

2,9 15,27,9,5

Yes

Post-Emergent tank-mix partners with glyphosate (1X rate) for “Roundup Ready and Enlist” Corn Hybrids – Weed control ratings at 8 weeks 9,5

Yes

RR, EN

Callisto + Aatrex 480

9,27,5

Yes

RR, EN

Engarde Co-pack

9,2.27

Yes

RR, EN

Impact or Armezon + Aatrex 480

9,27,5

Yes

RR, EN

Marksman

9,4,5

Yes

RR, EN

Primextra II Magnum

9,15,5

Yes

RR, EN

Vios G3

2,27,9

Yes

RR, EN

Aatrex 480

Yes Yes

Post-Emergent Treatments for “Liberty Link and Enlist” Corn Hybrids – Weed control ratings at 4 weeks after application Liberty 200SN

Yes

LL, EN

Post-Emergent tank-mix partners with Liberty for “Liberty Link and Enlist” Corn Hybrids – Weed control ratings at 8 weeks after application Aatrex 480 Callisto + Aatrex 480 Engarde Co-pack Impact or Armezon + Aatrex 480 Marksman Primextra II Magnum Vios G3

9,5 9,27,5 9,2.27 9,27,5 9,4,5 9,15,5 2,27,10

Yes Yes

Yes

Yes Yes Yes Yes Yes Yes Yes

LL, EN LL, EN LL, EN LL, EN LL, EN LL, EN LL, EN

E E E E G E E

<5 NC 9 7 <5 9 9

NC 82 8 72 NC 83 8

NC NC 9 7 NC 8 9

<5 NC 9 7 <5 9 9

<5 NC 9 7 <5 <5 7

NI NC 8 NI NI 7 8

9 NI 9 NI NI NI 9

<5 NC 9 7 <5 9 9

<5 5 NI <5 7 <5 NI

NI NI NI NI NI NI NI

9 NI NI NI 9 NI NI

9 8 9 8 9 9 9

5 <5 NI NI 6 5 6

9 9 NI NI 9 9 8

Post-Emergent Treatments for “Enlist” Corn Hybrids – Weed control ratings at 8 weeks after application

Enlist Duo (Low Rate)

4,9

Yes

Enlist Duo (High Rate)

4,9

Yes

Weed Management Guide 2015

Weed Management Guide CORN | SOYBEANS | Cereals

jimsonweed

lady’s thumb

lamb’s-quarters

lettuce, prickly

mustards

nightshade

pigweeds

ragweed, common

ragweed, giant

NI NI 7 NI 9 9 8 9 NI NI NI <5 NC NI NI NI NI 6 NI 9 NI 7 8 7 8 NI NI NI NI

NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI 83 9 NI NI NI

<5 NC 9 NI 9 9 9 9 9 9 9 9 <5 9 <5 9 8 9 9 9 NC 9 9 9 83 9 6 NC 5

9 7 9R NI 9 9 8 9 9 9 9 9 <5 9 <5 9 9 9 9 9 9 9R 9 9R 83 9R 9 7 5

8 8 7 NC 8 9 <5 8 8 NI NI 9 NC NI NI NI NI NI NI 9 8 7 9 8 NI NI NI NI NC

9 8 9R NC 6 9 9 6 9 9 9 6 <5 9 <5 9 9 9 9 9 9 9R 8 9 8 9 9R 8 7

7 7 9 NC 9 9 7 9 9 9 9 9 81 9 81 9 9 9 9 9 NI 9 9 NI NI 9 8 7 <5

9 9 9R 9R 9 9 7 9 8 9 9 9 81 9 81 9 9 9R 9 9 7 9R 8R 9R 8R 9 8R 9 9R

8 8 9R NC 9 9 7 9 9 9 9 9 <5 8 <5 9 8 9 8 9 9 9R 9 9R 8R 7R <5 9 NC

9 NI 7 NC 8 9 6 8 7 6 7 7 NC NI NC 5 5 NI 5 9 8 7 7 7R 8R <5 NC NI NC

7/8

NI 8

waterhemp

flower-of-an-hour

8 NI <5 NI 9 9 5 9 6 6 7 9 0 NI NC <5 9 NI 7 9 6 <5 8 7R 83R <5 NI NI NI

violet, field

fleabane, Canada

<5 NI <5 NI <5 <5 NI NI NI <5 NI <5 NI NI NI NI NI NI NI <5 <5 NI 7 NI NI NI NI NI NI

velvetleaf

chamomile, scentless

8 8 6 NC 9 9 9 9 9 8 7 8 0 5 NC 7 8 5 7 9 7 6 7 9 83R <5 NI 8 NC

three-seeded mercury

cocklebur

Broadleaf weeds (Annual, winter annual)

9 NI 9 NI 7 9 NI 7 NI <5 NI 9 NC NI NC NI NI NI NI 9 NI 9 9 8 NI 9 NI NI NI

8 8 <5 NC 9 9 9 9 9 9 9 9 NC 9 NC 7 9 9 9 9 7 <5 9 9 8 <5 6 9 5

5 NI 6 NI <5 NI <5 <5 NI NI NI NI NC NI NC NI 8 NI NI NI NI 6 NI 6 NI NI NI NI NI

NI NI NC NI 8 9 <5 8 NI 9 9 8 61 NI 61 NI NI NI 9 9 NI NC 5 <5 NI 9 7 NI NI

7/8

7 6

after application 6

NC 9

8/9

6 8 5 7 9 <5 8

NI NI NI NI NI NI NI

<5 6 NI <5 9 <5 6

7 NI NI NI 9 NI 8

NI NI NI NI NI 9 8

9 9 9 9 9 9 9

9R 9 9 9 9 9R 9

7 NI NI NI 9 NI NI

9R 9 9 9 9 9 9

9 9 9 9 9 9 9

9R 9 9 9 9 9 9

9R 9 8 9 9 7R 9

7 6 NI 5 9 <5 8

9 <5 NI NI 9 9

<5 9 9 7 9 <5 8

6 NI NI NI NI NI

NC 9 NI NI 9 9 9

Weed Management Guide 2015

Corn Table 3

Weeds with more than two leaves emerged at time of application will not be controlled. Large crabgrass only. 3 Weeds cannot be emerged at time of application to achieve this level of control. 4 Top growth control only. R Populations of this weed exist in Ontario that are resistant to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment. 1

Tolerant Hyrbid Abbreviations

Table 4. Emerged perennial weed and volunteer crop control ratings for post-emergent herbicides in corn

quackgrass

redtop

sow-thistle, perennial

Swamp smartweed

thistle, Canada

vetch, tufted

wire-stem muhly

nutsedge, yellow

milkweed

horsetail, field

horse-nettle

dandelion

carrot, wild

bindweed, field

Crop tolerance

Tolerant hybrids

Field corn

Seed corn

Sweet corn

Herbicide Treatment

Mode of action

Perennial weeds (Listed in alphabetical order)

NC NC NC

NC NC NC 9 NC NC 7 NC NC NC NI NC 7 NC NC NC NC 9 NC NC NI NC 9

NC NC NC 8 NC NC NI NC NC NC NI NC NI NC NC NC NC 9 NC NC NI NC 9

NI NI 8 NC 8 6-9 7 NI NI <5 NI 8 NI 6 6-9 9 NI NC 7 8 NI NI NC

NI NI <5 NC 6 NI NI NI NI NI NI 5 NI NI NI <5 NI NC <5 6 NI NI NC

7-9 7-9 <5 NC 8 7-9 NI NI <5 <5 NI 9 NI NI 7-9 8 7-9 NC 7 5-9 NI 8 NC

8 NI NI NC 9 NI 9 <5 5 9 NI 9 NI NI NI 8 7 NC NI 7 NI NI NC

NC NC NC <5 NC NC NI NC NC NC NI NC NI NC NC NC NC 9 NC NC NI NC 6

7-8 8-9

5 NI

8 9

5 7

8 9

7-8

NI 9

NC 83

NI NI

NC 83

9 9

NI NI

Pre-Emergent Treatments for “All” Corn Hyrbrids – Control ratings for unemerged weeds at 4-6 weeks after application Dual II Magnum Frontier Max Integrity

15 15 15,14

Yes Yes Yes

Yes Yes

Yes Yes Yes

All All All

E E E

NC NC <5

NC NC 6

NC NC 7

NC NC NC

NC NC 5

NC NC NC

8 8 8

Post-Emergent Treatments for “All” Corn Hyrbrids – Control ratings for emerged weeds at 4-6 weeks after application 2,4-D 2,4-DB Aatrex 480 + Crop Oil Accent Banvel II, Hawkeye or Oracle Basagran Forté Battalion Co-pack Broadstrike RC Buctril M, Badge, Mextrol or Logic M Callisto + Aatrex 480 Converge XT Co-pack Distinct Engarde Co-pack Impact or Armezon + Aatrex 480 Laddok Marksman MCPA Option + Aatrex 480 Pardner, Bromotril, Brotex or Koril + Aatrex 480 Peak Permit Tropottox Plus, Clovitox Plus or Topside Ultim

4 4 5 2 4 6 2,15,4 2 4 27,5 27,5 19,4 2.27 27,5 6,5 4,5 4 2,5 6,5 2 2 4 2

Yes Yes

Yes

Yes Yes

Yes

Yes Yes Yes

Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

All All All All All All All All All All All All All All All All All All All All All All All

F F E E G E G E P E E G E E E G P G E E G G G

7 7 7 NC 8 <5 NI NI 7 <5 NI 8 NI NI 7 8 7 NC 7 6 6-7 8 NC

<5 <5 <5 NC <5 <5 NI NI <5 6 NI 7 NI <5 5 <5 <5 NC 6 9 NI NI NC

<5 <5 <5 NC 6 <5 NI NI <5 6 NI 6 NI NI <5 6 <5 NC <5 5 NI <5 NC

NI NI NI NI 81 <5 NI NI NI NI NI 81 NI NI NI 81 NI NI NI 81 NI NI 82

<5 <5 <5 5-9 <5 <5 NI 7-8 7 <5 NI <5 NI <5 <5 <5 7 5-9 <5 <5 6 <5 6-9

<5 <5 <5 6 6 <5 NI NI 6 <5 NI 6 NI NI <5 6 6 6 <5 6 7 6 6

NC NC NC <5 NC 7 NI NI NC <5 NI NC 7 NC 7 NC NC <5 NC NC 9 <5 <5

Post-Emergent Treatments for “Roundup Ready” Corn Hyrbrids – Control ratings for emerged weeds at 4 weeks after application Glyphosate 1X rate Glyphosate 2X rate

9 9

Yes Yes

RR RR

E E

7 8

<5 7-9

6 8-9

8 9

<5 6

9 9

6 8

9 9

Post-Emergent Treatments for “Liberty Link” Corn Hybrids – Weed control ratings for emerged weeds at 4 weeks after application Liberty 200SN

Yes

6-7

Post-Emergent Treatments for “Enlist” Corn Hybrids – Weed control ratings for emerged weeds at 4 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

Yes Yes

EN EN

E E

NC 83

NC <5

NC 8

NI NI

8 8

NI 93

NI 83

NC 9

Corn Table 4

A tank mix with Ultim (nicosulfuron/rimsulfuron) is required to achieve this level of control. A tank mix with Distinct, Marksman or dicamba is required to achieve this level of control. Two applications will be required to achieve this level of control throughout the season. R Populations of this weed exist in Ontario that are resistant to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment. 1 2 3

Tolerant Hyrbid Abbreviations

Weed Management Guide 2015

Weed Management Guide CORN | SOYBEANS | Cereals

alfalfa, volunteer

adzuki beans, volunteer

canola, volunteer

canola (LL), volunteer

canola (RR), volunteer

clover (red), volunteer

cereals, volunteer

Volunteer crops

NC NC NC

NC NC NI

NC NC 9

<5 <5 <5

6 0 <5 <5 8 0 9 0 <5 <5 <5 8 NI <5 <5 8 <5 <5 <5 7-8 <5 <5 <5

NI NI 8-9 NI 8-9 <5 8-9 NI NI 8-9 NI 6-9 8-9 NI NI 9 NI NI 8-9 6-9 0 NI NI

9 NI <5 9 8 NI 9 8 8 9 9 8 9 9 NI 8 8 9 9 9 NI NI 9

<5 <5 <5 <5 9 <5 9 8 0 9 NI 9 9 9 <5 9 0 <5 <5 8 NI 0 <5

NC NC <5 8 <5 NC 8 NC NC <5 <5 <5 8 <5 <5 <5 NC 8 <5 NC NC NC 8

6 7

9 9

NC NC

6 7

9 9

NI NI

9 9

<5 <5

9 9

Weed Management Guide 2015

Table 1. Weed control ratings for pre-plant burndown treatments in soybeans Canola, volunteer (RR)

Carrot, wild

Chickweed

Clover, red

Dandelion

Fleabane, Canada

Flower-of-an-hour

<5 6 8

6 9 9

0 0 0

7 8 9

9 9 9

7 8 9

7 9 9

9R 9R 9R

9 9 9

8 9

9 9 9 9

Horsenettle

broadleaf plantain

7 9 9

burdock (2nd year)

7 8 9

burcucumber

9 9 9

atriplex, spreading

quackgrass

9 9 9

alfalfa, volunteer

foxtails

0 0 0

azuki bean, volunteer

corn, volunteer (RR)

bluegrass, annual

Tolerant varieties

Herbicide Treatment

Mode of action

Weed species typically found at time of burndown

Glyphosate: Emerged weed control ratings at 4 weeks after application Glyphosate (1X rate) Glyphosate (2X rate) Glyphosate (3X rate)

9 9 9

All All All

9 9 9

7 8

81 81

Herbicides and Co-packs that contain glyphosate: Weed control ratings at 8 weeks after application Assignment Co-pack (Pursuit + RU Weathermax) Flexstar GT + Turbocharge Guardian Co-pack (Polaris + Classic) Guardian Plus Co-pack (Polaris + Classic + Valtera)

2,9 9,14 9,2 9,2,14

All All All All

<5 <5 <5 <5

8 <5 7

9 8

Tank-mix partners with glyphosate (1X rate): Weed control ratings at 8 weeks after application 2,4-D ester 700 Amitrol 240 Blackhawk Co-pack (2,4-D Ester 700 + Aim EC) Boundary LQD Broadstrike RC Classic or Chaperone Conquest LQ Co-pack (Pursuit + Sencor 480F) Eragon + Merge Fierce (84 g/ac.) FirstRate Focus Integrity Lorox L (High rate) Optill Prowl H2O Pursuit, Phantom or Nu-Image Sencor or Tricor (High rate) Step Up Co-pack (Chaperone + Valtera) Valtera (High rate)

9,4 9,11 2,14 9,15,5 9,2 2 9,2,5 9,14 9,15,14 9,2 9,15,14 9,15,14 9,5 9,2,14 9,6 9,2 9,5 9,2,14 9,14

All All All All All All All All All All All All All All All All All All All

<5 8 8

<5 <5 <5

0 0 0 0 0 <5 <5 0 0 <5 0 0 0 <5 0 <5 0 <5 0

9 9 9

8 7 7

9 9 9 8

8 <5 9

7 8 8

<5 9 9

9 9 9

9 8 9

7 9

8 9

5 5 6

9 9 8 9 8 9 9 9 7 7

8 9

5 4 6

9R 8R <5 9

9 8R 7

9 9 9 9 9 9 9

<5 <5

9 9

6 6

8 9 8

9 <5 9 <5 <5 9 5 5

Herbicides and Co-packs that contain glyphosate: Emerged weed control ratings at 4 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

EN EN

NI NI

0 0

9 9

NC 9

NI NI

NC 81

8 8

9 9

<5 <5

NC 8

8 9

NI NI

Table 2. Weed control ratings for pre-emergent herbicide treatments in soybeans (weeds are not emerged at the time of application) Flower-of-an-hour

Fleabane, Canada

Cocklebur

Chickweed

Chamomile, scentless

Bur-cucumber

Buckwheat, wild

Beggarsticks, nodding

Atriplex, spreading

Wild oats

Broadleaf weeds (Annual, winter annual)

Witchgrass

Sandbur

Proso millet

Foxtails

Fall panicum

Crabgrass

Barnyard grass

Crop tolerance

Tolerant varieties

Herbicide Treatment

Mode of action

Grassy weeds (Annual)

Pre-emergence Herbicides and Co-packs: weed control ratings at 8 weeks after application (Weed species not emerged at time of application) Assignment Co-pack Boundary LQD Broadstrike RC Canopy Pro Co-pack (Classic + Tricor 75 DF) Classic or Chaperone Command 360 ME Conquest LQ Co-pack (Pursuit + Sencor 480F) Dual II Magnum Fierce FirstRate Focus Co-pack (Pyroxasulfone 85 + Aim EC) Freestyle Co-pack (Classic + DuPont Imazethapyr) Frontier Max Lorox L Optill Prowl H2O Pursuit, Phantom or Nu-Image Sencor or Tricor (Low rate) Sencor or Tricor (High rate) Step Up co-pack (Chaperone + Valtera) Treflan, Bonanza or Rival Triactor Co-pack (Nu-Image + Chaperone + Valtera) Valtera 14

2,9 15,5 2 2,5 2 27 2,5 15 15,14 2 15,14 2,2 15 5 2,14 6 2 5 5 2,14 3 2,2,14 14

All All All All All All All All All All All All All All All All All All All All All All All

G E E G G G G E G E E G E G E G G G G G G G G

7 9 NC 6 NC 8 9 9 9 NC 9 7 9 5 7 8 7 7 7 <5 9 7 <5

7 9 NC 6 NC 9 7 9 9 NC 9 7 9 5 7 8 7 6 6 <5 9 7 <5

7 8 NC 6 NC 8 7 8 NI NC 8 7 8 5 7 8 7 7 7 <5 8 7 <5

9R 9 NC 6 <5 91 9R 9 9 NC 9 9R 9 5 9R 8 9R 5 5 5 9 9R <5

7 <5 NC 6 NC NI 7 <5 NI NC NI 7 <5 5 7 <5 7 <5 <5 NI 6 7 NI

72 <5 NC <5 NC 6 72 <5 6 NC 6 72 <5 <5 72 8 72 NI NI NI 6 72 <5

7 9 NC 6 NC 8 8 9 NI NC 9 7 9 5 7 8 7 8 8 <5 9 8 <5

NC NC NC 82 NC NI 82 NC NI NC NC 82 NC NC NC NC NC 82 82 NI 8 NI NI

NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI

8 NI 9 NI NI 9 NI <5 NI 9 NI 8 <5 9 8 NI 8 NI 7 9 NI NI NI

8 NI 9 8 NI 8 9 <5 NI NI NI 8 <5 8 8 NI 8 7 7 7 <5 9 7

NI NI NI NI NI NI NI NC NI NI NI NI NI NI NI NI NI NI 7 8 NI NI NI

NI NI NI 82 NI NI 82 NC NI NI NI NI NI NI NI NI NI 82 82 NI NI NI NI

9 NI 8 NI NI NI 9 NC 9 9 NI 9 NI 9 9 9 9 9 9 9 9 9 9

7R NI 7R 7R NI 6 8 0 <5 9R <5 7R NC 5 7R NI 7R 7 7 7R <5 8 <5

<5 6 9R 8R 8R <5 <5 0 <5 9R NC 8R NC <5 9 <5 <5 6 91 8R <5 8R <5

9 NI 8 NI NI NI NI NC NI NI NI 9 NI 9 9 NI 9 NI 9 NI NI NI NI

Weed Management Guide 2015

Weed Management Guide

CORN | SOYBEANS | Cereals

Three-seeded mercury

9 9 9

6 7

9 9 8 8

9R 9 7 8

6 61,2

4 7 8

7 9R 6R 9R

8 9

9R 6 6 9 9 9 9R 9R 7 7

7 9R 7R 9R

61,2 61,2 9 61,2 4 61,2

4 61,2 61,2

9 9

6 61,2

<5 9 <5 9

<5 81,2 9 9 9 7R

7 92 82 8

9 <5 <5 <5 5 61,2 61,2 <5

6R 7 8R

8 9 8

6 6 7

61,2

9 9 9 9

8R 9R <5 <5

6R 6 <5 <5

81,2 81,2

61,2 61,2

NI NI

9 9

6 6

91 91

Nightshade

Pigweeds

Ragweed, common

Ragweed, giant

Three-seeded mercury

Velvetleaf

Waterhemp

NI NI

Mustards

9 9

9 9 9

Lettuce, prickly

9 9

9R 9R 8 8

4 6 8

Lamb's-quarters

NI NI

7 8 9

Lady's thumb

8 8

9 9 9 9 9 8

9R 9 <5 9R 9

7 8 7 6R 8R 5R 8R 8 7 9R

Waterhemp

Ragweed, giant 6

9 9

<5 9 5 <5

9 9 9

Vetch

Ragweed, common

8 9 9

<5 <5 N.I.

Violet (pre flower)

Pineappleweed

9R 9R 9R

Mustards

9R 9R 9R

Lamb's-quarters

<5 6 9

Lettuce, prickly

9 9 9

Horsetail, field

Pigweed

(Annual, biennial or perennial – listed in alphabetical order)

9 NI 8 9 NI 8 9 <5 7 NI <5 9 <5 9 9 NI 9 9 9 9 <5 9 7

9R 7 9R 9R 6R 8 9R <5 9 9R <5 9R <5 9 9R 8 9R 9R 9R 9 8 9 9

NI NI NI NI NI NI NI NC NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI

9 8 9 9 NI <5 9 <5 9 NI NI NI <5 9 9 NI 9 9 9 9 <5 9 8

9R 8 7R <5 NC <5 9R 81 9 <5 9 9R 81 9 9R NI 9R <5 <5 9 <5 9 9

9R 8 9R 9R 7R <5 9R 81 9 9R 9 9R 81 9R 9R 8R 9R 9R 9R 9 8 9 9

8R <5 8R 8R 5R 8 8R <5 7 9R <5 8R <5 8 8R <5 8R 8R 8R 8R <5 8 7

6 <5 7R 8R NI <5 6 NC <5 9R NC 8R NC 6 7 NC 6 7 7 8R <5 6 <5

6 NI 8 7 NI NI 5 NC NI 9 NI NI NC 7 6 NI 6 8 9 7 NI 5 9

9 <5 9 8 <5 9 9 NC 7 9 NI 9 NC 6 9 NI 9 7 7 8 <5 9 7

< 5R 6 < 5R < 5R < 5R NI < 5R 6 9 < 5R 9 < 5R 6 NC < 5R 7 < 5R < 5R < 5R 81,2 8 8 8

Weed Management Guide 2015

6 <5 < 5R <5

9 9

Soybeans table 1 1 2

Top growth burnoff only, regrowth will occur. The addition of Merge at 0.4 l/ac. is required to achieve this level of control.

table 2 1 2

The highest labelled rate is required to achieve this level of control. This level of control is achieved when the weed is emerged at the time of application.

Tolerant Varieties

All = This treatment can be applied to any soybean variety. RR = This treatment can only be applied to “Roundup Ready” soybean varieties. LL = This treatment can only be applied to “Liberty Link” soybean varieties. EN = This treatment can only be applied to “Enlist” soybean varieties. opulations of this weed exist in Ontario that are resistant to P this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Table 3. Emerged annual grass and broadleaf weed control ratings for post-emergent herbicides in soybeans Beggarsticks, nodding

Biennial wormwood

Buckwheat, wild

Bur-cucumber

Chamomile, scentless

Chickweed

Cocklebur

Fleabane, Canada

Atriplex, spreading

Witchgrass

Broadleaf weeds (Annual, winter annual)

Wild oats

Sandbur

Proso millet

Foxtails

Fall panicum

Crabgrass

Barnyard grass

Crop tolerance

Tolerant varieties

Herbicide Treatment

Mode of action

Grassy weeds (Annual)

NC NC NC NC NC 9 <5 9 9 8 <5 9 7

NC NC NC NC NC 7 7 7 7 NI NI 8 NI

NC NC NC NC NC 7 7 4 7 NI 8 8 8

NC NC NC NC NC NI NI <5 NI <5 NI NI NI

NC NC NC NC NC <5 <5 NI NI <5 <5 <5 NI

NC NC NC NC NC NI NI NI NI NI NI 9 9

NC NC NC NC NC 9 6 8R 9R 5 7 9 8R

NC NC NC NC NC 5 <5 8R 9R <5 <5 5 <5

Post-Emergent Treatments for “All” Soybean Varieties – Weed control ratings at 4-6 weeks after application Assure II or Yuma GL Excel Super Poast Ultra Select or Arrow Venture L Basagran Forté Blazer Classic or Chaperone FirstRate Pinnacle SG Reflex Cleansweep Co-pack (Pursuit + Basagran Forté) Pursuit or Panthom or Nu-Image

1 1 1 1 1 5 14 2 2 2 14 2,5 2

All All All All All All All All All All All All All

E E E E E G F G G G F/G G G

9 9 9 9 9 NC NC NC NC NC NC 8 8

8 8 8 8 8 NC NC NC NC NC NC 8 8

9 9 9 9 9 NC NC NC NC NC NC 6 6

9 9 9 9 8 NC NC NC NC NC NC 9R 9R

9 9 9 9 9 NC NC NC NC NC NC 7 7

9 8 7 7 9 NC NC NC NC NC NC NI 7

9 9 9 9 9 NC NC NC NC NC NC 8 8

9 9 9 9 9 NC NC NC NC NC NC 9 9

NC NC NC NC NC <5 NI NI NI 6 NI 5 NI

Post-Emergent Treatments for “Roundup Ready” Soybean Varieties – Weed control ratings at 4-6 weeks after application Assignment Co-pack (RU Weathermax + Pursuit) Flexstar Glyphosate 1X rate Glyphosate 2X rate Guardian Co-pack (Polaris + Classic)

9,2 9,14 9 9 9,2

RR RR RR RR RR

G G E E G

9 9 9 9 9

7/8 7/8 7/8 8 7/8

8 8 8 8 8

9 9 9 9 9

8 7/8 7/8 8 8

8 8 8 8 8

9 9 9 9 9

9R 9R 9R 9R 9R

Post-Emergent Treatments for “Liberty Link and Enlist” Soybean Varieties – Weed control ratings at 4-6 weeks after application Liberty 200SN

LL, EN

NI NI

NI 94

NI 9

NI NI

9 9

8 9

NI NI

8 9

Post-Emergent Treatments for “Enlist” Soybean Varieties – Weed control ratings at 4-6 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

EN EN

E E

NI 9

8 9

NI 9

NI NI

9 9

NI NI

Table 4. Emerged perennial weed and volunteer crop control ratings for post-emergent herbicides in soybeans

Sow-thistle, perennial

Thistle, Canada

Vetch

Wire-stem muhly

Alfalfa, volunteer

Adzuki beans, volunteer

Canola, volunteer

Canola (LL), volunteer

Redtop

Quackgrass

Nutsedge, yellow

Milkweed

Horsetail, field

Horse-nettle

Dandelion

Carrot, wild

Bindweed, field

Crop tolerance

Tolerant varieties

Herbicide Treatment

Mode of action

Perennial weeds (Listed in alphabetical order)

NC NC NC NC NC 6-9 6-9 5-9 5-9 4-7 5-8 6-9 4-7

NC NC NC NC NC 7-9 6-9 7-9 7-9 4-8 5-9 7-9 5-9

NC NC NC NC NC <5 5 5 5 <5 5 <5 <5

7 5 6 6 8 NC NC NC NC NC NC <5 <5

NC NC NC NC NC 0 6 <5 <5 0 6 0 0

NC NC NC NC NC <5 <5 4-8 <5 <5 <5 <5 <5

NC NC NC NC NC NI NI 9 8 <5 8 9 9

1 1 1 1 1 5 14 2 2 2 14 2,5 2

All All All All All All All All All All All All All

E E E E E G F G G G F/G G G

NC NC NC NC NC <5 <5 <5 <5 <5 <5 <5 <5

NC NC NC NC NC <5 <5 6-9 2-7 <5 <5 2-6 2-7

NC NC NC NC NC <5 <5 6 <5 <5 <5 <5 <5

NC NC NC NC NC <5 <5 <5 6 <5 <5 <5 <5

NC NC NC NC NC <5 6 <5 <5 <5 6 <5 <5

NC NC NC NC NC <5 <5 9 <5 <5 <5 <5 <5

NC NC NC NC NC 7 <5 9 <5 <5 <5 7 7

9 <5 6 7 8 NC NC NC NC NC NC <5 <5

6 <5 6 7 7 NC NC NC NC NC NC NI NI

9,2 9,14 9 9 9 9,2

RR RR RR RR RR RR

G G E E E G

7 7 7 8 8 7

<5 <5 <5 7-9 7-9 <5

7 7 6 8-9 9 9

8 8 8 9 9 8

<5 6 <5 6 6 <5

9 9 9 9 9 9

6 6 6 8 8 9

9 9 9 9 9 9

7-8 7-8 7-8 8-9 8-9 7-8

8 8 8 9 9 8

5 5 5 7 8 5

8 8 8 9 9 8

6 6 6 7 8 6

9 9 9 9 9 9

Post-Emergent Treatments for “Liberty Link and Enlist” Soybean Varieties – Weed control ratings at 4-6 weeks after application Liberty 200SN

LL, EN

6-7

NC 83

9 9

NI NI

9 9

Post-Emergent Treatments for “Enlist” Soybean Varieties – Weed control ratings at 4-6 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

EN EN

E E

NC 83

NC <5

NC 8

NI NI

8 8

NI 93

NI 83

NC 9

NI 9

Weed Management Guide 2015

Weed Management Guide Flower-of-an-hour

Lady's thumb

Lamb's-quarters

Lettuce, prickly

Mustards

Nightshade

Pigweeds

Ragweed, common

Ragweed, giant

Three-seeded mercury

Velvetleaf

Violet, field

Waterhemp

CORN | SOYBEANS | Cereals

NC NC NC NC NC 8 6 7 8 8 7 8 7

NC NC NC NC NC 9 8 8 NI 8 8 9 9

NC NC NC NC NC 8 6 <5 <5 9R 6 8 8R

NC NC NC NC NC <5 <5 6 6 <5 6 <5 <5

NC NC NC NC NC 9 9 9 9 8 9 9 9

NC NC NC NC NC 7 8 <5 <5 <5 8 9R 9R

NC NC NC NC NC 7 9 9R <5 9R 9 9R 9R

NC NC NC NC NC 7 9 8R 9R 5 9 9R 9R

NC NC NC NC NC 6 7 8R 9R <5 7 7R 8R

NC NC NC NC NC 5 6 7 7 5 7 6 5

NC NC NC NC NC 9 7 8 9 8 6 9 9

NC NC NC NC NC <5 6 5 8 <5 7 5 5

NC NC NC NC NC <5 9 <5 <5 <5 9 <5 <5

9 9 9 9 9

8 8 7/8 8 8

9 9 9 9 9

9R 8 9R 9R 9R

7R 7R 7R 8R 7R

8 8 8 9 8

9 9 9 9 9

7/8 7/8 7/8 8 7/8

9 9 9 9 9

8/9

NI NI

NI 9

9 9

NI NI

9 9

NI 9

9 9

NI NI

NI 9

NI NI

Canola (RR), volunteer

Clover (red), volunteer

Corn, volunteer

Corn (LL), volunteer

Corn (LL/RR), volunteer

Corn (RR), volunteer

Corn (Enlist), volunteer

Cereals, volunteer

Volunteer crops (Listed in alphabetical order)

NC NC NC NC NC NI NI 9 8 <5 8 9 9

NC NC NC NC NC <5 6 <5 <5 <5 6 <5 <5

8-9 7-9 6-8 7-9 7-9 NC <5 <5 <5 NC <5 <5 <5

0 0 4-9 6-9 0 NC <5 <5 <5 NC <5 <5 <5

9 9 9 9 9 NC NC <5 <5 NC <5 <5 <5

9 8 NC NC NC 8

6 6 6 7 8 6

9 9 9 9 9 9

<5 <5 NC NC NC <5

9 9 9 9 9 9

9 9

<5 <5

9 9

NC NC

9 9

Weed Management Guide 2015

Soybeans table 3 & 4

= Populations of this weed exist in Ontario that are resistant to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Tolerant Varieties

Table 1. Weed control ratings for pre-plant burndown treatments in cereals

Chickweed

Clover, red

Dandelion

Fleabane, Canada

Flower-of-an-hour

Henbit

Horsenettle

9 9 9

Carrot, wild

Buckwheat, wild

7 9 9

Canola, volunteer (RR)

Atriplex, spreading

7 8 9

Broadleaf plantain

Alfalfa, volunteer

8 NI NI

Burdock (2nd year)

Azuki bean, volunteer

9 9 9

Burcucumber

Witchgrass

Sandbur

Quackgrass

Foxtails

Bluegrass, annual

Mode of action

Herbicide Treatment

Tolerant hybrids

Weed species typically found at time of burndown (Annual, biennial or perennial – listed in alphabetical order)

<5 6 8

6 9 9

0 0 0

7 8 9

9 9 9

7 8 9

7 9 9

9R 9R 9R

9 9 9

81 81 NI

Glyphosate: Emerged weed control ratings at 4 weeks after application Glyphosate (1X rate) Glyphosate (2X rate) Glyphosate (3X rate)

9 9 9

All All All

9 9 9

7 8

Tank-mix partners with glyphosate (1X rate): Weed control ratings at 8 weeks after application – in other words “If I add a herbicide to glyphosate, will it improve 2,4-D Ester 700 Eragon + Merge

9,4 9,14

All All

8 6

6 71

8 9

9 9

<5 5

9 9

<5 <5

8 7

7 7

8 9

<5 8

<5 <5

NC 8

8 9

NI NI

Herbicides and Co-packs that contain glyphosate: Emerged weed control ratings at 4 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

All All

NI NI

9 9

NI 9

NI NI

NC 9

NI NI

NC 81

8 8

9 9

Table 2. Emerged annual grass and broadleaf weed control ratings for post-emergent herbicides in cereals

Bluegrass, annual

Foxtails

Fowl meadow grass

Wild oats

Atriplex, spreading

Biennial wormwood

Buckwheat, wild

Bur-cucumber

Carrot, wild

Chickweed

Cocklebur

Chamomile, scentless

Dandelion

Centgrass, loose silky

Cereal crop tolerance

Red clover underseeded

Grassy weeds (Annual)

Alfalfa underseeded

Wheat

Rye

Oats

Barley

Herbicide Treatment

Mode of action

Crop Uses

NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC

NC NC NC NC 9 NC 9 NC NC NC NC NC NC NC NC NC NC NC NC NC 9 NC NC NC NC NC NC NC

NC NC NC NC 8 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC

NC NC NC NC 9 NC 9 NC NC NC NC NC NC NC NC NC NC NC NC NC 9 NC NC NC NC NC NC NC

NI 9 NI NI NC 6 NC 9 <5 NI 9 9 3 9 9 NI 9 NI NI NI NC NI 9 9 NI 9 NI 6

NI NI NI NI NC 9 NC NI NI NI NI NI NI NI NI NI NI NI NI NI NC NI NI NI NI NI NI 9

<5 <5 <5 6 NC 9 NC 9 9 9 8 9 8 8 8 2 2 2 2 8 NC 9 9 9 9 7 7 9

NI NI NI NI NC <5 NC NI NI NI NI NI NI NI NI NI NI NI NI NI NC NI NI NI NI NI NI 7

<5 <5 <5 <5 NC <5 NC 7 <5 <5 <5 5 7 7 7 <5 <5 <5 <5 <5 NC 7 7 7 <5 <5 <5 8

<5 <5 <5 <5 NC 9 NC 7 <5 NI <5 7 <5 <5 5 5 5 NI NI NI NC 7 7 7 5 8 NI <5

8 8 8 8 NC 9 NC 7 9 NI NI NI 5 8 7 7 7 7 NI 8 NC NI 8 7 NI 9 NI 9

<5 <5 NI NI NC <5 NC 8 NI NI 6 NI NI <5 <5 <5 <5 NI NI NI NC 8 8 8 5 NI NI NI

<5 <5 <5 <5 NC NI NC 5 <5 NI 6 8 <5 <5 <5 <5 <5 <5 <5 NI NC NI NI 5 NI 5 NI 5

Pre-Emergent Treatments – Emerged weed control ratings at 4-6 weeks after application Eragon + Merge

Yes

Post-Emergent Treatments – Emerged weed control ratings at 4-6 weeks after application 2,4-D Amine 2,4-D Ester 2,4-DB (Embutox, Caliber, Cobutox) 2,4-DB + MCPA Achieve Liquid or Bison Banvel II, Hawkeye or Oracle Bengal or Vigil Boost M Co-pack Buctril M, Badge, Mextrol or Logic M Dyvel Estaprop XT, Dichlorprop DC or Turboprop Infinity Lontrel Lontrel + 2,4-D Lontrel + MCPA MCPA Amine MCPA Ester MCPA Sodium Mecoprop or Compitox Pardner, Bromotril, Brotex or Koril Puma Advance Refine SG Refine SG + 2,4-D Refine M Co-pack Target, Tracker XP or Sword Trophy Co-pack Tropotox Plus, Clovitox Plus or TopSide Peak + Pardner

4 4 4 4,4 1 4 1 2,4 4,5 4 4 27,5 4 4,4 4,4 4 4 4 4 5 1 2 2,4 2,4 4 4,4 4 2,4

Yes1 Yes1 Yes Yes Yes1 Yes1

Yes Yes

Yes Yes Yes Yes

Yes

Yes1 Yes1 Yes Yes1 Yes1 Yes1 Yes1 Yes1 Yes1 Yes1 Yes1 Yes Yes1 Yes1 Yes1 Yes1 Yes1 Yes

Yes Yes Yes

Yes1

Yes

Yes Yes Yes Yes Yes

Yes

Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes1 Yes Yes Yes Yes Yes Yes1 Yes1 Yes1 Yes Yes Yes Yes Yes Yes1 Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes

Yes

G G G G G P G G E P G E G G G G G G G E G E G G P G G E

NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC

Weed Management Guide 2015

Weed Management Guide CORN | SOYBEANS | Cereals Cereals Table 1

Pigweed

Pineappleweed

Ragweed, common

Ragweed, giant

9 9 9

5 6 9

9 9R 9R

Top growth burnoff only, regrowth will occur. The addition of Merge at 0.4 l/ac. is required to achieve this level of control.

Table 2: Cereals

Waterhemp

Mustards

9 9 9

Vetch

Lamb's-quarters

9 9 9

Violet (pre flower)

Lettuce, prickly

<5 <5 NI

Three-seeded mercury

Horsetail, field

1 2

Only labelled for use on spring-planted varieties. Top growth control only.

Populations of this weed exist in Ontario that are resistant to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

R R

8 9 9

7 8 9

<5 6 8

9 9 9

7 8

9 7

6 92

91 61,2

NI NI

9 9

NI NI

6 6

91 91

NI NI

control of the target weeds” 8

61,2 8 8

NI NI

9 9

NI NI

Fleabane, Canada

Flower-of-an-hour

Ground ivy

Henbit

Hemp nettle

Horsetail

Lady's thumb

Lamb's-quarters

Lettuce, prickly

Mustards

Nightshade

Pigweeds

Ragweed, common

Ragweed, giant

Speedwell species

Shepherd's purse

Sow-thistle

Stinkweed

Thistle, Canada

Three-seeded mercury

Velvetleaf

Vetch

Violet, field

Waterhemp

Broadleaf weeds (All life cycles listed in alphabetical order)

8 9 NI NI NC 9 NC 6 6 NI 9 9 9 9 9 7 8 NI NI NI NC NI NI 6 NI 8 NI 7

NI NI NI NI NC NI NC NI NI NI NI NI NI NI NI NI NI NI NI NI NC NI NI NI NI NI NI NI

7 7 NI NI NC NI NC 8 9 NI 7 NI NI 7 8 8 9 NI NI NI NC 6 8 8 9 NI NI NI

<5 <5 NI NI NC <5 NC <5 <5 <5 <5 NI NI NI NI <5 <5 NI NI NI NC <5 <5 <5 <5 NI NI NI

<5 <5 <5 <5 NC 7 NC 9 7 9 7 9 NI <5 7 8 8 8 <5 <5 NC 9 9 9 8 8 8 9

9 9 NI NI NC NI NC 9 9 NI 9 6 8 9 9 9 9 NI NI NI NC NI NI 9 NI 9 NI 9

<5 <5 <5 <5 NC 9 NC 9 9 9 8 9 <5 9 9 9 9 9 9 8 NC 9 9 9 9 7 <5 9

9 9 7 9 NC 9 NC 9 9 9 9 9 <5 9 9 9 9 9 9 9 NC 9R 9 9 9 9 9 9

9 9 NI NI NC 6 NC 9 8 9 9 8 NI 9 9 9 9 NI NI NI NC 8 9 9 9 8 NI 8

9 9 7 9 NC 6 NC 9 9 9 9 9 <5 9 9 9 9 9 9 7 NC 8 9 9 9 9 9 9

7 7 7 7 NC 9 NC 7 9 NI NI 9 <5 7 NI NI NI NI NI 9 NC NI 7 NI NI NI NI NI

9 9 9 9 NC 9 NC 9 8 9 9 9 <5 9 9 9 9 9 9 7 NC 9R 9 9 9 9 9 9

9 9 8 8 NC 9 NC 9 9 9 9 9 7 9 9 9 9 8 9 9 NC 7R 9 9 9 9 9 9

9 9 NI NI NC 8 NC 7 7 NI 9 8 9 9 9 8 8 NI NI NI NC NI NI 7 9 9 NI 5

6 8 NI NI NC 5 NC 9 5 8 9 <5 NI NI NI 9 9 NI <5 NI NC 9 9 9 9 NI NI 8

9 9 8 8 NC 6 NC 9 9 9 9 9 NI 9 9 9 9 9 NI 8 NC 9 9 9 9 9 9 9

5 5 5 5 NC 8 NC 8 7 8 8 8 9 9 9 7 7 NI NI 6 NC 8 8 8 8 8 9 8

9 9 6 6 NC 6 NC 9 9 9 9 9 NI 9 9 9 9 9 7 8 NC 9 9 9 9 9 9 9

8 8 NI NI NC 7 NC 7 5 8 8 <5 9 9 9 8 8 NI 7 5 NC 7 7 7 8 8 9 5

8 9 NI NI NC 7 NC NI NI NI NI NI NI NI NI 8 8 NI 7 <5 NC NI NI NI NI NI NI 8

8 8 8 8 NC 9 NC 8 9 NI NI 9 NI 8 8 8 8 8 NI 9 NC 8 9 9 NI NI 9 9

8 8 <5 <5 NC 8 NC 6 5 8 7 5 9 9 9 7 7 NI NI NI NC NI 6 6 8 9 NI NI

5 5 NI NI NC <5 NC 8 NI 7 9 NI NI NI NI 8 8 NI NI NI NC 8 8 8 NI NI NI 6

NI NI NI NI NC 8 NC NI 8 NI NI NI NI NI NI NI NI NI NI NI NC NI NI NI NI NI NI NI

Weed Management Guide 2015

WIN WITH ENTER FOR A CHANCE TO WIN A NEW TEMPO® HIGH SPEED PLANTER. You could win an 8-row Tempo High Speed Planter, courtesy of the Enlist™ Weed Control System from Dow AgroSciences. Two additional winners will each be awarded 80 acres of Enlist corn seed and Enlist Duo™ herbicide. Enter today at WinWithEnlist.ca Find out more about the evolution of speed and precision at TempoPlanter.com Advance your acres.

™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Regulatory approvals are pending in other geographies for the Enlist™ herbicide solution and crops containing Enlist herbicide tolerance traits. The information presented here is not an offer for sale. Always read and follow label directions. ©2014 Dow AgroSciences LLC.

TEMPO®, VÄDERSTAD® and VÄDERSTAD Design® are trademarks being used under license. 02/15-41404 CGE