Bret Rush PBI - Gordon Representative

Indiana & Illinois

Bret Rush PBI - Gordon Representative

Indiana & Illinois

Today’s agendaToday’s agenda

• * A few things to think about…

• * Weeds & Herbicides.

• * New Formulation Technology

• * Questions ??

2 Ft. of Snow!2 Ft. of Snow!

It’s coming !!It’s coming !!

When do I apply Post-emerge Herbicides

When do I apply Post-emerge Herbicides

• The weed must be actively growing in order to get control.

• Depending of the weed species in your lawn you may need to make an early spring application to control over-wintering annual and perennial weeds

• Common early spring weeds include:

– Dandelions, Clover, Chickweed, Henbit, and Mallow

When do I apply? (cont.)When do I apply? (cont.)

• Summer is generally not a good time for weed control. The hot dry conditions of summer causes the weeds to quit growing in order for the plant to conserve moisture. Also the turf may be stressed by these conditions.

• These weeds are best controlled with a late spring application-- not summer:

• Knotweed• Spurge • Purslane • Plantains • Oxalis • and others

Broadleaf Herbicidesand how they work

Broadleaf Herbicidesand how they work

• Different herbicides work well on specific weeds

– 2,4-D has superior control on dandelions and plantain.

– While MCPP (Mecoprop) provides strong clover, chickweed and black medic control.

– Dicamba has excellent control on knotweed.

When reacted together under the proper conditions, these three herbicides become stronger and more effect on more weeds than if use separately or just mixed together.

1. Understand the weeds you deal with

1. Understand the weeds you deal with

• Lifecycles

• Perennial• Annual

– Winter– Summer

• Biennial (not many in turf)

Perennial WeedsPerennial Weeds• Dandelion*• White clover*• Broadleaf plantain*• Creeping Charlie

(Ground Ivy)• Wild violet• Mouse-ear chickweed*…

• Best time for control of perennial weeds?

Fall

Life cycle of an annual weed

SeedSeedling

Plant flowers

Plant setsseed

Plant diesDead

Life cycle of a winter annual weed

Seed

Plant setsseed

Germination

Spring Winter

SummerDead

Fall

Winter AnnualsWinter Annuals

• Common chickweed*• Henbit• Common mallow• Corn speedwell…

• Best time for control– Fall

Life cycle of a summer annual weed

SeedSeedling

Plant flowers

Plant setsseed

Plant dies

Spring-SummerFall

Spring-Summer

DeadGermination

Summer AnnualsSummer Annuals

• Prostrate spurge*• Prostrate knotweed**• Black medic• Yellow woodsorrel• Common purslane

• Best time for control– Spring/Early Summer

3. Ester vs. Amine

Ester Formulations (Oil based)•Faster •Better in cool weather•Increased volatility

Amine Formulations (Water Based)•Slower •Better in warm weather•No volatility

High & low volatile estersHigh & low volatile esters• High Volatile Esters

• 2,4-D ethyl ester• 2,4-D butyl ester• 2,4-D iso-butyl ester

• Low Volatile Esters• 2,4-D ethyl hexyl ester• 2,4-D iso-octyl ester

Amine (Water based)Trimec on 5-10-2013 Sprayed on 5-4-2013

Soil Temp: 40⁰Air Temp: 37⁰

Ester (Oil based)SpeedZone on 5-10-2013

Sprayed on 5-4-2013Contains Carfentrazone

Soil Temp: 40⁰Air Temp: 37⁰

Trimec 992 on 5-10-2013 Sprayed on 5-4-2013

(Air Temp: 37⁰F, Soil Temp 40⁰F)

SpeedZone on 5-10-2013 Sprayed on 5-4-2013

Trimec 992 on 5-15-2013 Sprayed on 5-4-2013

SpeedZone on 5-15-2013 Sprayed on 5-4-2013

SAME RATE:

Per 1,000 Square Feet

3 gals./1,000 sq. ft.3 gals./1,000 sq. ft. 1 gal./1,000 sq. ft.1 gal./1,000 sq. ft.

Which applies MORE herbicide??

Follow label directions

??

Call someone

Low VolumeLow Volume

1 gallon/1,000 sq. ft.

or 44 gallons/acre

High volumeHigh volume

3 gallon/1,000 sq. ft.

or 132 gallons/acre

Do you use backpacks?Do you use backpacks?

Low volume-flat fan

Higher Volume – Hollow cone

Flat fan nozzles should only be held in a stationary position

while spraying.

Flat fan nozzles should only be held in a stationary position

while spraying.

Attached to a backpack sprayer

What happened?

Spray wand held correctly,non-swinging arm motionproviding a flat band pattern

Spray wand turned sideways“swinging arm motion” resultingIn a zig zag pattern.

Slide of Spray Techniques Used For Training of Applicators

Glyphosate mis-application

Uniform weed or insect control?

Drying Patterns

Flat fan nozzleturned sidewaysusing a “swinging arm motion”Initially the pattern appears uniform

Zig Zag patternis starting toshow

Over application in others areas can result in injury.

Drying Patterns

Uneven pattern-- under application can result in poor control

Over Application

As the sprayingpattern continuesto dry, underapplicationbecomes moreobvious.

Drying Patterns

Uniform weed or insect control?

Boom sprayer – clogged nozzles

CALIBRATION

CALIBRATION

CALIBRATION

CALIBRATION

CALIBRATION

CALIBRATION

CalibrationCalibration

Spray Ratevs

Spray Volume

Spray Ratevs

Spray VolumeRATE: Per 1,000 Square Feet

Current T-Zone Emulsifiable Concentrate (EC)

Current T-Zone Emulsifiable Concentrate (EC)

• Solvents & emulsifiers are used in the EC formulation to allow the formulation to be mixed with water & form a temporary emulsion in the spray tank.

• Thus, the milky white appearance when mixed.

Why a new TZoneWhy a new TZone

• EPA regulations (of course) – VOCs (Volatile Organic Compounds) – VOCs are “ozone precursors”– Regulated under the U.S. Clean Air Act

• T-Zone EC has VOCs typical of other commercial EC-s in the market.

Solid:(Sulfentrazone)

Suspo-Emulsion FormulationSuspo-Emulsion Formulation• A Suspo-Emulsion (SE) is used for a

combination of active ingredients with very different physical properties in one formulation. The combination of a suspended solid active(s) & physically stabilized emulsified oil active ingredients in a continuous aqueous phase is defined as a Suspo-Emulsion.

T-Zone SE ContainsT-Zone SE Contains• Suspended solid: Sulfentrazone• Oil droplets: Triclopyr ester, 2,4-D ester &

Dicamba– 2,4-D ester is used as the solvent/emulsifier.

• Water– Becomes the carrier (solvent)

Oil:(Triclopyr +

2,4-D +Dicamba)

Solid: (Sulfentrazone)

Real World Suspo-EmulsionsReal World Suspo-Emulsions

• Improved Profile– Lower VOC

• EPA won’t let PBI claim low VOCs (go figure)

– No solvent– Reduced Phyto Potential due to

reduced solvent.– Less odor

• Same Dependable Performance

Benefits of SE FormulationBenefits of SE Formulation

• T-Zone EC vs. T-Zone SE– The difference

• “SE” on the label • The concentrated

product will be milky white.

T-Zone (EC formulation)

• Same ai Load as Current T-Zone– % ai Slightly Less - Due to the

product being slightly heavier per gallon.

– Lb. ai/gal is the same.T-Zone

Contains the exact same amount of active ingredient

per gallon

Tzone SE and Tzone EC Comparisons

Tzone SE and Tzone EC Comparisons

Tzone SE Tzone EC% A.I. # A.I./Gal % A.I. # A.I./Gal

2,4-D Acid 19.44% 1.75 21.18% 1.75

Triclopyr Acid 5.55% 0.50 6.04% 0.50

Dicamba 2.22% 0.20 2.43% 0.20

Sulfentrazone 0.66% 0.06 0.73% 0.06

Specific Gravity

8.98 #/gal 8.26 #/gal

Water-Based Oil-Based

Labeled for:Labeled for:Cool-season turf:• Kentucky bluegrass• Ryegrass• Fescues

Warm-season turf (Dormant turf only):• Hybrid bermudagrass • Common bermudagrass• Zoysiagrass• Bahiagrass

Target Weeds – Triclopyr Weeds* with a sulfentrazone boost for speed

and yellow nutsedge suppression

Target Weeds – Triclopyr Weeds* with a sulfentrazone boost for speed

and yellow nutsedge suppression

2X the Triclopyr per Acre

Effective control of tough weeds

2X the Triclopyr per Acre

Effective control of tough weeds

Company Product Rates Triclopyr a.i./ acre Comparison

PBI-Gordon T-Zone 3.25 to 4.0 pts/ acre 0.20 to 0.25 Nearly 2X more pounds on the ground

NuFarm 4-Speed XT 3.0 to 4.0 pts/acre 0.11 to 0.143 - -

NuFarm Cool Power 2.5 to 3.5 pts/acre 0.09 to 0.131 - -

NuFarm Horse Power 2.0 to 3.0 pts/acre 0.10 to 0.143 - -

Helena Battleship III 3.0 to 4.0 pts/acre 0.10 to 0.135 - -

JDL/LESCO Momentum FX2 3.0 to 4.0 pts/acre 0.10 to 0.135 - -

Triclopyr active ingredient (applied)

• Sizes available• 2 x 2.5 gallon• 4 x 1 gallon• 12 x 1 quart