Post on 02-Jan-2016
description
transcript
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