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Tom Wolf Agrimetrix Research & Training, SK @nozzle_guy Jason Deveau OMAFRA, ON @spray_guy Learning to Spray …again complying with new dicamba & 2,4-D choline labels Presented by HELMUT SPIESER

Learning to spray again

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Page 1: Learning to spray again

Tom Wolf Agrimetrix Research & Training, SK

@nozzle_guy

Jason Deveau OMAFRA, ON @spray_guy

Learning to Spray …again complying with new dicamba & 2,4-D choline labels

Presented by HELMUT SPIESER ●

Page 2: Learning to spray again

Old is new again

Monsanto’s Xtend: glypho + dicamba (VaporGrip)

*BASF’s Engenia: dicamba

Dow’s Enlist Duo: glyphosate + 2,4-D choline

2,4-D

Dicamba

Monsanto’s XtendiMax: dicamba (VaporGrip)

Dicamba

2,4-D

*submitted to PMRA for registration

Page 3: Learning to spray again

What’s the big deal?

• Synthetic auxins can cause a lot of damage when there is off-target movement (from drift, vapour & contaminated sprayers)

• New traits means 2,4-D and

dicamba will be sprayed by: • more producers, • on more acreage, • and because of post-

emergent applications, later in the season

• Plus, low-cost, generic and

more volatile chemistries (e.g. 2,4-D amine or ester) may be (inadvisably) substituted https://www.extension.purdue.edu/extmedia/id/id-453-w.pdf

Page 4: Learning to spray again

Photo source Monsanto demo plots: Chatham, Ontario

Powerful herbicides

• Even trace amounts have big impacts

• These are rinses with water, sprayed over conventional soybeans

Page 5: Learning to spray again

Choline chemistry = low volatility

• Humidomes (lab) and field work indicate low volatility

Imag

e so

urce

: Dow

(201

6)

Page 6: Learning to spray again

Colex-D formulation = low drift

• Dow Agro-Sciences research farm in Fowler ON, in 4 mph winds

• Low-drift formulation claim 75% less physical drift

Imag

e so

urce

: Dow

(201

6)

Page 7: Learning to spray again

Gov’t, media and industry: Renewed focus on stewardship

• There is more attention than ever before on spray drift and sprayer settings

Image source: Monsanto (2014)

XC

Page 8: Learning to spray again

1) Nozzle selection (>Coarse) 2) Boom height (<24 inches) 3) Wind direction & speed (<15 mph) 4) Application volume (15 g/ac or greater) 5) Observe buffer zones & nearby sensitive crops 6) Greater attention to sprayer cleanout

Renewed focus on stewardship

• BASF founded this academy comprised of independent application tech specialists

• There are six major tenants:

Page 9: Learning to spray again

What should the producer / custom applicator do?

• Droplet size is a component in how the PMRA determines ‘risk’ and establishes buffer zones

• And, because the labels specify, it’s the law

• To reduce the potential for unhappy surprises, comply with the label

• Central to compliance is knowing the size of the droplets coming out of your sprayer

Page 10: Learning to spray again

Droplet size and the label: Enlist Duo

coarse to extremely coarse spray

Page 11: Learning to spray again

Droplet size and the label: XtendiMax (same as Banvel II)

extremely coarse to ultra coarse

Page 12: Learning to spray again

Droplet size and the label: Engenia

extremely coarse to ultra coarse

Submitted to PMRA for registration Label not yet finalised

Page 13: Learning to spray again

One nozzle makes many droplet sizes

• A single nozzle produces a range of droplet sizes

• The median droplet size changes with pressure

• Rate controllers adjust pressure according to travel speed

Page 14: Learning to spray again

Spray quality

ASABE 572.1 is a standard that defines categories for flat fan spray quality based

on the droplet size range, & number relative to volume

Page 15: Learning to spray again

Spray quality categories

• Most nozzle manufacturers voluntarily comply with this standard and provide spray quality information

Page 16: Learning to spray again

ISO flat fan rates for water at 40 psi

• Nozzle colour does not indicate spray quality

• Nozzle colour indicates rate

• So how do you figure out spray quality?

Page 17: Learning to spray again

How to determine your spray quality

1. ID the nozzles on the sprayer

2. Match the nozzle to published spray quality data

3. ID the expected pressures for expected travel speed range and water volume

Page 18: Learning to spray again

Hardi Flat Fan

• Type, Material, Flow Rate, Angle (…except Deere)

• Hardi • (F) = Flat fan • (03 & blue colour) = 0.3 gpm @ 40 psi • (110) = 110° fan angle

• Catalogue gives data

Page 19: Learning to spray again

TeeJet AI TwinFan

• ID may be hidden under cap

• Note AI spray quality vs. conventional

Page 20: Learning to spray again

• Some tips can be tougher to ID…

GreenLeaf (Agrotop) TurboDrop Asymmetrical Dual Flat Fan (TADF)

Page 21: Learning to spray again

TurboDrop Venturi TeeJet VisiFlo SprayMax XR

GreenLeaf (Agrotop) TurboDrop Asymmetrical Dual Flat Fan (TADF)

Page 22: Learning to spray again

• Venturi metres pressure and flow, so it dictates overall rate • Droplet size is determined by the tips • Venturi rate is generally ½ combined rate of the two tips

Venturi (04) Fan (05) Fan (03)

= ( ) ÷ 2 +

GreenLeaf (Agrotop) TurboDrop Asymmetrical Dual Flat Fan (TADF)

Page 23: Learning to spray again

http://www.greenleaftech.com/dynamic.php?pg=Choosing_the_Right_Nozzle/Nozzle_Calculator

• Thankfully, you can just look up the whole combo in the catalogue

• Don’t have a catalogue? Go online to the manufacturer’s website

GreenLeaf (Agrotop) TurboDrop Asymmetrical Dual Flat Fan (TADF)

Page 24: Learning to spray again

Hypro Guardian Flatfan

• Some nozzle/cap combos print the ID in ink

• While rare, some catalogues don’t specify spray quality… so what to do?

Page 25: Learning to spray again

Smartphone nozzle wizards and calculators

• As they say, “there’s an app for that”

Page 26: Learning to spray again

Smartphone nozzle wizards and calculators

• This app has every flat fan typically used in Canada

• Search spray quality by nozzle, or nozzle by spray quality!

Page 27: Learning to spray again

Make your pressure gauge your speedometer (Tom Wolf)

• When using rate controllers, operate nozzle from mid-to-high pressure range (especially AI tips)

• Now you can slow down (e.g. turns) without compromising spray quality or uniformity

Page 28: Learning to spray again

• Identify your nozzles

• Look up the recommended pressure range of your nozzle

• Determine the spray quality over the pressure range

• Identify the travel speeds at which you will meet the label spray quality requirements

Homework

For once, Calvin is mistaken.

Page 29: Learning to spray again

Dr. Tom Wolf

@nozzle_guy Dr. Jason Deveau

@spray_guy

To learn more about spraying, subscribe to

www.sprayers101.com

…and follow us on Twitter