considering conventional soybeans - weed science, … · considering the $$ of pre’s treatments...

Considering Conventional Soybeans:Moving from the Simple to the Complex

What a Difference a Year Makes:Price of Herbicide Inputs Continues to Rise

Glyphosate Product

Price/Unita

2007 2008 2009b

Generic $13.00/gal $18.00/gal $32.00/galGlyphosate

3 /g$0.10/fl oz

$3.25/standard app

/g$0.14/fl oz

$4.48/standard app

3 /g$0.25/fl oz

$8.00/standard app

Roundup $34.00/gal $40.00/gal $67.00/galPowerMaxc $0.27/fl oz

$5.94/standard app$0.31/fl oz


$11.52/standard app

Touchdown T t l

$32.50/gal$0 25/fl

$36.00/gal$0 28/fl

$61.00/gal$0 48/flTotal $0.25/fl oz



$11.52/standard appaPrices obtained from major ag retailers in MO but should be viewed as approximates only.bProjected prices for early 2009.j p y 9cIndicates price of Roundup PowerMax in 2008 and 2009 but Roundup OriginalMax in 2007.

’…….but it’s not just glyphosate

Product

Price/Unita

2007 2008 2009b

Aatrex $11.38/gal $13.55/gal $18.50/gal3 /g$2.84/qt

3 55/g$3.39/qt

5 /g$4.63/qt

Classic $12.71/oz$6.36/standard app

$13.42/oz$6.71/standard app


Firstrate $25.98/oz$7.80/standard app


$36.00/gal$10.80/standard app

Prowl H2O $28.06/gal $34.20/gal $37.00/gal$7.02/standard app $8.55/standard app $9.25/standard app

Valor $4.31/oz$12.94/standard app



aPrices obtained from major ag retailers in MO but should be viewed as approximates only.bProjected prices for early 2009.

1. Preemergence residual herbicides are a requirement.

80

100

POST

m2)

Broadleaves Grasses

40

60

Den

sity at

cation

(#/m

0

20

Weed D

App

lic

0

Treatments

LSD 6

30

40

36 37 38 38 40 39 3836

40 38

cre)

LSD=6

20 21

eld (Bu/Ac

0

10Yie

0

300

350

T

Broadleaves Grasses

200

250

300

ty at PO

STn (#/m

2)

100

150

eed Den

sit

App

lication

0

50We A

Treatments

*= Indicates PRE herbicides that required only 1 POST glyphosate application**= Indicates PRE herbicides that required 2 POST glyphosate applications

Untreated IntRRo (21 May) Prowl (21 May)Rndup PwrMax (20 June) Rndup PwrMax (20 June)Rndup PwrMax (11 July) Rndup PwrMax (11 July)

Untreated Boundary (21 May) Authority Assist (21 May)Rndup PwrMax (25 June) Rndup PwrMax (25 June)Rndup PwrMax (29 July) Rndup PwrMax (29 July)

Untreated Prefix (21 May) Canopy (21 May)Rndup PwrMax (1 July) Rndup PwrMax (1 July)

Untreated Envive (21 May) Valor XLT (21 May)Rndup PwrMax (8 July) Rndup PwrMax (8 July)

60 LSD=7

40

50 55 55 53 51 53 5148

56 56 55 5457

54

/Acre)

20

30

25

Yield (Bu/

0

10

Y

*= Indicates PRE herbicides that required only 1 POST glyphosate application**= Indicates PRE herbicides that required 2 POST glyphosate applications

Considering the $$ of PRE’s

Treatments Rate/A Cost/A

Considering the $$ of PRE’s

Authority Assist 5 fl ozs 10.82 Authority First 3.2 ozs 12.10 Authority MTZ 10 ozs 10 19Authority MTZ 10 ozs 10.19 Boundary 1.5 pts 14.26 Canopy 3 ozs 8.90 Envive 3 5 ozs 12 18Envive 3.5 ozs 12.18 Gangster 0.3 oz + 1.5 oz 14.50 IntRRo 2 qts 11.20 Prefix 2 pts 11 05Prefix 2 pts 11.05 Prowl H2O 2 pts 9.25 Valor 2 ozs 9.31 Valor XLT 3 ozs 10.41Valor XLT 3 ozs 10.41 *Approximate re tail cost of PRE soybean trtmts in M issouri.

2. Once the preemergence residual herbicide breaks, you MUSTmake a timely postemergence herbicide application for late‐season broadleaf AND grass weeds.

G B dl fHerbicide

GrassWeeds

Broadleaf Weeds Comments

Aim No Yes fairly limited spectrum of broadleaves; no grass weeds

Assure II Yes No grasses only; often needs to be applied separatelyg y; pp p y

Basagran No Yes minimal grass control; potential for crop injury

Classic No Yes broadleaves only; possible antagonism with grass herbicides; ALS‐resistant weeds limits utility

Cobra/Phoenix Minimal Yes minimal grass control; potential for crop injury

Firstrate No Yes broadleaves only; possible antagonism with grass herbicides; ALS‐resistant weeds limits utility

Flexstar/Reflex Minimal Yes minimal grass control; potential for crop injuryFlexstar/Reflex Minimal Yes minimal grass control; potential for crop injury

Fusilade Yes No grasses only; often needs to be applied separately

Harmony GT No Yes broadleaves only; possible antagonism with grass herbicides; ALS‐resistant weeds limits utility

Poast Plus Yes No grasses only; often needs to be applied separately

Pursuit Yes Yes ALS‐resistant weeds limits utility

Raptor Yes Yes ALS‐resistant weeds limits utility

Resource No Yes fairly limited spectrum of broadleaves; no grass weeds

Select Max Yes No grasses only; often needs to be applied separately

Ultra Blazer Minimal Yes minimal grass control; potential for crop injury

An ExampleTreatm ents Tim ing Rate /A Cost/ARR Seed ---------- 150,000 35.28 G i Gl h t EPOST 1 t 8 00

p

Generic Glyphosate EPOST 1 qt 8 .00 AMS EPOST 2.5 lbs 0.50 Generic Glyphosate LPOST 1 qt 8 .00 AMS LPOST 2.5 lbs 0.50

Tota l: 52 .28

RR Seed ---------- 150,000 35.28 Prefix PRE 2 pts 11.05 pGeneric Glyphosate POST 1 qt 8 .00 AMS POST 2.5 lbs 0.50

Tota l: 54 .83

Conv Seed ---------- 150,000 21.00 Prefix PRE 2 pts 11.05 F lexstar POST 1.25 pts 17.95 Assure II POST 8 fl ozs 8 13Assure II POST 8 fl ozs 8.13 COC POST 1% v /v 0.66

Tota l: 58 .79

$37.79

• Fields with dense weed populations should probably be• Fields with dense weed populations should probably be avoided when possible.

• Preemergence herbicides are a necessity, timing of g y, gconventional postemergence herbicides is critical (i.e., they won’t kill big weeds).

M k f f i i l• Make sure of your reasons for growing conventional soybeans, not because the popular press says it MAY be a cheaper endeavor. Pencil your own seed costs/herbicide

d f lfprograms out and see for yourself.

• Don’t skimp on the weed management program in conventional soybeans There are few if any “rescue”conventional soybeans. There are few, if any, rescue options.

considering conventional soybeans - weed science, … · considering the $$ of pre’s treatments...

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