importance of weeds current herbicide options - · pdf fileoweed classification current...
TRANSCRIPT
![Page 1: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/1.jpg)
Weed Management in Christmas Trees
Jatinder S. AulakhAssistant Weed Scientist, Valley Laboratory, Windsor, CT
Email: [email protected]
![Page 2: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/2.jpg)
Importance of weedsoDefinition of a weedoWeed classification
Current herbicide optionsoPreemergenceoPostemergence
Future research chemicalsoPreemergenceoPostemergence
Weed identification quiz
Presentation Outline
![Page 3: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/3.jpg)
Importance of Weeds
What is a Weed?Why to Control Weeds?
![Page 4: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/4.jpg)
What is a Weed?
Common definitions:
oPlant whose virtue has not been discovered oPlant growing where it is not wanted oPlant out of place oPlant that is objectionable or
interferes with the activities or welfare of man (WSSA)
Monarch butterfly on milkweed
![Page 5: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/5.jpg)
What is a Weed?
![Page 6: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/6.jpg)
CompetitionoFor water oNutrients oLight leading to reduced crop growth and quality
Why to Control Weeds?
![Page 7: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/7.jpg)
Harbor insect and disease pests
Interfere with pruning and harvest opoison ivy, brambles
Health hazardopoison ivy
Provide cover for rodents
Why to Control Weeds?
![Page 8: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/8.jpg)
Weed Classification
![Page 9: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/9.jpg)
Weed Classification
Morphologyograssesobroadleafosedges
Life cycleoannualobiennialoperennial
Growth periodowinterosummer
Habitatoterrestrialsoaquatics
Family nameoasteraceaeopoaceaeomalvaceaeopolygonaceaeoleguminaceaeoonagraceaorubiaceae
![Page 10: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/10.jpg)
Morphology
cheeseweed/little mallow broomesedge/poverty grass yellow nutsedge
![Page 11: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/11.jpg)
Yes or Noo Noo A grass herbicide controls only grasseso Envoy plus, Select, Fusillade DX
Can a Postemergence Grass Herbicide Control Sedges?
![Page 12: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/12.jpg)
Annuals: complete their life cycle in 1 year. examples-annual grasses -crabgrass, foxtails, barnyard grass –annual broadleaves-pigweed, ragweed etc.
crabgrass giant foxtail redroot pigweed common ragweed
Life Cycle-Annual
![Page 13: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/13.jpg)
Life Cycle-Biennial
Biennials: complete life cycle in 2 years. In the first year, complete vegetative growth. In the second year, produce flowers and seeds e.g. wild carrot, etc.
wild carrot burdock bull thistle primrose
![Page 14: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/14.jpg)
Perennials: live many years by overwintering rootstocks, rhizomes, tubers, e.g. quackgrass, field bindweed, goldenrod, smooth bedstraw, etc.
quackgrass bindweed goldenrod smooth bedstraw
Life Cycle-Perennial
![Page 15: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/15.jpg)
Yes and Noo Yes: some, when growing from seedo Quackgrass, Canada thistle, and field bindweed
from seedo No, when growing from rhizomes, tuberso Quackgrass, Canada thistle, and field bindweed
from rhizomes
Can Preemergence Herbicides Control Perennial Weeds?
![Page 16: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/16.jpg)
Family Name
asteraceae poaceae malvaceae
![Page 17: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/17.jpg)
Family Name
polygonaceae leguminaceae onagraceae
![Page 18: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/18.jpg)
Family Name
Rubiaceae
![Page 19: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/19.jpg)
Yes or Noo No. Why?o Bedstraw belongs to rubiaceae family
ANDStinger (clopyralid) has activity only on weeds belonging to asteraceae, leguminaceae, and polygonaceae families.
Will Herbicide “Stinger” Control Smooth Bedstraw?
![Page 20: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/20.jpg)
Herbicides Currentlyin Use
Preemergence Herbicides
![Page 21: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/21.jpg)
Preemergence Herbicides
Preemergence herbicides kill weeds before they emerge from the soil. They kill germinating weeds and not the weed seeds.
Weed Seed
Herbicide Barrier
![Page 22: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/22.jpg)
Herbicide Product name Mode of actionIndaziflam Specticle flo, Marengo Cellulose biosynthesis inhibitor
Isoxaben Gallery Cellulose biosynthesis inhibitor
Flumioxazin Sureguard Protoporphyrinogen oxidase inhibitor
Oxyflourfen Goal 2XL, Goal Tender, Galligan
Protoporphyrinogen oxidase inhibitor
Oxadiazon Ronstar 2 G Protoporphyrinogen oxidase inhibitor
Preemergence Herbicides
![Page 23: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/23.jpg)
Preemergence Herbicides
Herbicide Product name Mode of actionPendimethalin Pendulum 3.3 EC Seedling root growth Inhibitor
Oryzalin Surflan AS Seedling root growth Inhibitor
Trifluralin Treflan Seedling root growth Inhibitor
Napropamide Devrinol 50 DF Seedling shoot growth Inhibitor
S-metolachlor Pennant Magnum Seedling shoot growth Inhibitor
![Page 24: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/24.jpg)
Herbicide Product name Mode of actionSimazine Princep 4L, Princep 90 DF Photosystem II Inhibitor
Atrazine Atrazine 4L, Atrazine 90 DF Photosystem II Inhibitor
Hexazinone Velpar Photosystem II Inhibitor
Hexazinone + Sulfometuron
Westar Photosystem II + ALS Inhibitors
Oxyfluorfen + Prodiamine
Biathlon PPO and seedling root growth inhibitors
Preemergence Herbicides
![Page 25: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/25.jpg)
Preemergence Herbicides
Grass activeo Surflan AS, Pennant Magnum, Pendulum 3.3 EC, Pendulum Aquacap, Treflan, Devrinol
Broadleaf activeo Atrazine, Gallery, Gemini, Goal 2XL, Marengo, Simazine, Specticle Flo, Sureguard, Westar, Velpar
![Page 26: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/26.jpg)
Preemergence Herbicides
Indaziflamo Marengo, Spectacle flo, Alion
Flumioxazino Sureguard, Sureguard SC
Isoxabano Gallery
![Page 27: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/27.jpg)
Preemergence Herbicides
Isoxaban + Prodiamineo Gemini
Hexazinone + Sulfometurono Westar
Prodiamine + Oxyfluorfeno Biathlon
![Page 28: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/28.jpg)
Indaziflam
![Page 29: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/29.jpg)
Active ingrediento7.4%
Rate/aco6 – 10 floz
Max seasonal use rateo18.5 floz
Specticle FLO (Indaziflam)
![Page 30: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/30.jpg)
Active ingrediento7.4%
Rate/aco7.5 – 15.5 floz
Max seasonal use rate/aco 18.5 floz
Marengo (Indaziflam)
![Page 31: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/31.jpg)
Active ingrediento 19.05%
Rate/aco 3.5 – 6.5 floz
Max seasonal useo 10.5 floz/ac
Alion (indaziflam)
![Page 32: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/32.jpg)
Strengths oBroader weed control spectrum
o Grasses and broadleaf weeds o Triazine resistant weeds
o Lambsquarters, redroot pigweed etc
oLonger weed control durationo6-8 months
oExcellent crop toleranceoLabelled rates and species
Indaziflam
Weaknesseso In consistent control of Horseweed, common ragweed, yellow foxtail in CT trials.
![Page 33: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/33.jpg)
Flumioxazin
![Page 34: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/34.jpg)
Over-the-topoBefore bud-break or after
hardening off
Rate/aco8 - 12 oz/floz
Max seasonal useo 24 oz/ac
o 2 applications of 12 oz ORo 3 applications of 8 oz
Flumioxazin
![Page 35: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/35.jpg)
Tolerant conifers (OTT)oConcolor, Douglas, Fraser, Grand, Noble,
Turkish, Eastern White Pine, Norway spruce, Colorado blue spruceo BALSAM?oDirected/Test on small scale
Flumioxazin
![Page 36: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/36.jpg)
Weeds Controlled- SimazineFlumioxazin
StrengthsoExcellent broadleaf activityoBroader spectrum of weed control than Simazine
oControls many grassesoControls emerged weeds < 2” in heightoLonger weed control durationo6-7 months under ideal conditions
![Page 37: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/37.jpg)
Isoxaben
Tree species:oBF, Concolor Fir, WS,
NS, CS, CBS, WP, SPoDF, FF ?
Weeds controlled:o ~60 broadleaf species
![Page 38: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/38.jpg)
Isoxaben
Over-the-topoBefore bud-break or after
hardening off
Rate/aco0.66 – 1.33 lb
Max seasonal useo 4 lb/ac
o60 d interval between applications
![Page 39: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/39.jpg)
Isoxaben + Prodiamine
Over-the-topoBefore bud-break or after
hardening off
Rate/aco38 – 87 floz
![Page 40: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/40.jpg)
Hexazinone + Sulfometuron
Active Ingredientso Hexazinone: 68.6%o Sulfometuron methyl:
6.5%
Rate/aco 6-12 oz
![Page 41: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/41.jpg)
Hexazinone + Sulfometuron
Tree specieso Fraser Fir, Douglas Fir,
Colorado blue spruce, Scotch pine, White pine
o Balsam Fir- No injury (2016 Trials)
Colorado spruceo Injured in CT trials.
![Page 42: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/42.jpg)
Hexazinone + Sulfometuron
Suppressiono Yellow nutsedge, quackgrass,
field horsetail, wild carrot, goldenrod, Canada thistle, pink sorrel
Cautiono Calibrationo Tree age
![Page 43: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/43.jpg)
Oxyflorfen + Prodiamine
![Page 44: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/44.jpg)
Oxyflorfen + Prodiamine
Granular herbicideRate/ac: 100 lbControls grassy and broadleaf weeds
oCrabgrass, green foxtail, yellow foxtail, barnyardgrass, goosegrass, fall panicum, horseweed, pigweed, sowthistle, shepherd’s purse
![Page 45: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/45.jpg)
Current Postemergence Herbicide Options
![Page 46: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/46.jpg)
Postemergence broadleaf herbicides
ClopyralidoStinger 3L, Lontrel 3L, Clopyralid 3
TriclopyroGarlon 3 A, Triclopyr 3 A
GlyphosateoRoundup Original, Roundup Pro 4L, others
![Page 47: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/47.jpg)
Clopyralid
Labelled specieso BF, FF, DF, GF, NF, BS, WP
Postemergence control:o Weeds up to 6” tall or 5 leafo asteraceaeo leguminaceaeo polygonaceae
![Page 48: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/48.jpg)
Clopyralid
Will not controlo weeds larger than 6
inch in sizeo grasses and sedgeso many biennial and
perennial weedso woody vines
![Page 49: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/49.jpg)
Clopyralid
Rate/aco 8 – 10.7 floz
Cost/ac (banded on 3’ row)o Varies with
manufacturer, product rate, packing size, and application method
$16-21Or
$8-10.5
$23-30Or
$12-15
1 floz = $1.31 1 floz = $2.501 floz = $2
$10.5-14Or
$5.3- 7.0
![Page 50: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/50.jpg)
Will Clopyralid Control Mile-A-Minute?
Polygonaceae
![Page 51: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/51.jpg)
Triclopyr
BF, FF, BS, WS are more tolerant than DF and WPRate/aco 2-5 pints (0.75-1.75 lb ai)/acre.
Appliction timingoLate summer or early fall after
conifer terminal growth has hardened off.
Poison ivy
Oriental bittersweet
![Page 52: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/52.jpg)
Triclopyr
Weeds controlledobindweed, burdock,
curly dock, Canada thistle, dandelion, plantains, white clover, wild lettuce
mugwortCanada thistle Wild grapeVirginia creeper
![Page 53: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/53.jpg)
Glyphosate
![Page 54: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/54.jpg)
Glyphosate
![Page 55: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/55.jpg)
Glyphosate
32 floz of Roundup original= 21 floz of Roundup powermax.
Calculate required amount based on the acid component not the active ingredient component.
![Page 56: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/56.jpg)
Glyphosate
Max seasonal use rate (roundup original)o 2 qts/ac true firso 1.0 - 1.5 qts/ac (DF, WP)
Semi-directed applicationso Minimize contact to basal 12-14
inch o 30 GPA solution o Fall application
![Page 57: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/57.jpg)
Glyphosate
Weed species shifto Species naturally
tolerant to glyphosate
Resistant Weedso Horseweed, common
ragweed, pigweeds
Asiatic dayflower Horsenettle
Hairy vetch Common primrose
![Page 58: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/58.jpg)
Postemergence Control of Grassy Weeds
Fluazifopo Fusilade DXo Ornamec
Clethodimo Select, Envoy,
Envoy plus
![Page 59: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/59.jpg)
Postemergence Control of Grassy Weeds
Fusiladeo24 floz/appoTwo apps/yro48 floz/yr
Envoy Pluso16-32 floz/appoTwo apps/yro64 floz/yr
![Page 60: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/60.jpg)
Future Research Chemicals
Preemergence Herbicides
![Page 61: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/61.jpg)
Cleantraxx (penoxsulam + oxyfluorfen)
![Page 62: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/62.jpg)
Cleantraxx (penoxsulam + oxyfluorfen) ?
Pre and postemergence controlo ~ 70 weed specieso Grasses, broadleaf weeds, and woody tree seedlingso 4 leaf or 4” tall
o Field bindweed suppression
Pre rate/aco 1.5-3.0 pt
Post rate/aco 3.0- 4.5 pt
![Page 63: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/63.jpg)
Lumax (atrazine + s-metolachlor + mesotrione) ?
Atrazine @ 1-2 lb ai /acS-Metolachlor @ 4.8 lb ai/acMesotrione @ 0.75 lb ai/ac
![Page 64: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/64.jpg)
Preemergence Herbicide Costs
CostoSimazine
~ $60/2.5 gal
oSurflan AS~ $167/2.5 gal
oPennant Magnum~ $224/gal
oGoal 2XL~ $179/2.5 gal
Cost/ac (3’ band application) o Simazine @ 3-4 qt
$6 - 9
o Surflan AS @ 3-4 qt$17 - 22
o Pennant Magnum @ 2-2.5 pt$19 - 24
o Goal 2XL @ 4.5-6.0 pt$14 - 18
Herbicide costs were adapted from Kellysolutions.com
![Page 65: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/65.jpg)
Preemergence Herbicide Costs
Costo Westar
~ $692/15 lbo Sureguard
~ $745/5 lbo Gallery 75 DF
~ $100/lbo Lumax
~ $190/2.5 gal
Cost/ac (banded application) o Westar @ 6-12 oz
$5.75 - 11.5o Sureguard @ 10-12 oz
$31 - 37o Gallery 75 DF @ 0.66-1.0 lb
$22 - 33o Lumax @ 3-4 qt
$19 - 25
Herbicide costs were adapted from Kellysolutions.com
![Page 66: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/66.jpg)
Preemergence Herbicide Costs
Costo Specticle flo
~ $1550/galo Marengo SC
~ $1115/0.5 galo Alion
~ $420/1qt
Cost/ac (3’ banded application) o Specticle flo @ 6-10 floz
$24 - 40o Marengo @ 6-10 floz
$35 - 58o Alion @ 3.5-6 floz
$15 - 26
Herbicide costs were adapted from Kellysolutions.com
![Page 67: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/67.jpg)
Potential Postemergence Herbicides
![Page 68: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/68.jpg)
Potential Postemergence Herbicides
![Page 69: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/69.jpg)
Weed Identification
Weed Identification
Quiz
![Page 70: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/70.jpg)
Weed IdentificationQuiz
What plant is this?
A. HoneysuckleB. Oriental bittersweetC. Wild grapeD. Virginia creeper
![Page 71: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/71.jpg)
Answer: Wild grape
![Page 72: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/72.jpg)
Weed IdentificationQuiz
What plant is this?
A. HoneysuckleB. Oriental bittersweetC. Trumpet creeperD. Virginia creeper
![Page 73: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/73.jpg)
Answer: Virginia creeper
![Page 74: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/74.jpg)
Weed IdentificationQuiz
What plant is this?
A. Mile-a-minuteB. Oriental bittersweetC. Trumpet creeperD. Virginia creeper
![Page 75: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/75.jpg)
Answer: Oriental bittersweet
![Page 76: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/76.jpg)
Weed IdentificationQuiz
A. Common burdockB. Curly dockC. Common ragweedD. Horseweed
What plant is this?
![Page 77: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/77.jpg)
Answer: Horseweed
![Page 78: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/78.jpg)
Weed IdentificationQuiz
A. Evening primroseB. Asiatic dayflowerC. Pink sorrel D. Cocklebur
What plant is this?
![Page 79: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/79.jpg)
Answer: Asiatic dayflower
![Page 80: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/80.jpg)
Weed IdentificationQuiz
A. Common burdockB. HorsenettleC. lambsquartersD. Cocklebur
What plant is this?
![Page 81: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/81.jpg)
Answer: Horsenettle
![Page 82: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/82.jpg)
Weed IdentificationQuiz
A. Milkweed B. Canada thistleC. Common ragweedD. Horseweed
What plant is this?
![Page 83: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/83.jpg)
Answer: Common ragweed
![Page 84: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/84.jpg)
A. Yellow toadflaxB. Common ragweedC. Butter and eggsD. Kochia
Weed IdentificationQuiz
What plant is this?
![Page 85: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/85.jpg)
Answer: Yellow toadflax
![Page 86: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/86.jpg)
A. Canada thistleB. Common ragweedC. HorseweedD. Wild radish
Weed IdentificationQuiz
What plant is this?
![Page 87: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/87.jpg)
Answer: Canada thistle
![Page 88: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/88.jpg)
A. Canada thistleB. Common ragweedC. HorseweedD. Wild radish
Weed IdentificationQuiz
What plant is this?
![Page 89: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/89.jpg)
Answer: Wild radish
![Page 90: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/90.jpg)
Weed IdentificationOnlineo Identifying Weeds in Christmas Treeshttp://www.ipm.msu.edu/agriculture/christmas_trees/identifying_weeds_in_christmas_trees
Bookso Weeds of the Northeast – Cornell Presso Weeds of the South - University of Georgia
Press
Weed Identification
![Page 91: Importance of weeds Current herbicide options - · PDF fileoWeed classification Current herbicide options oPreemergence ... barnyard grass ... common ragweed, yellow foxtail in CT](https://reader031.vdocuments.us/reader031/viewer/2022011800/5ab437007f8b9ab7638b75c3/html5/thumbnails/91.jpg)
Questions?