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Microsoft word - prostak mlp april 19 2010.doc
A Close Look at Some Common
Herbicides for Turf and Landscape
Randy Prostak - UMass Extension Agriculture and Landscape Program
Massachusetts Association of Landscape Professionals
April 19, 2011
. Different from a weed- or pest-based presentation, this is an herbicide- or product-based
presentation, Aimed to increase your knowledge of the herbicides used in turf and
. Able to use and take advantage of off-patent generics or herbicides-on-fertilizer products
Hopefully a new way in which you look at weed management tools
. Review some old, long time standards, Some new herbicides and products that you may have
seen in trade magazines or electronic mailing lists
. Acetaminophen, Aspirin, Ibuprofen, and Naproxen, OH MY!!!! - OTC pain relievers with some
. aspirin – Bayer, Bufferin, several pharmacy generics first and most common over-the-counter
- treats headaches, minor body aches and pains, reduces inflammation
. acetaminophen (or paracetamol) - Tylenol and several pharmacy generics – combinations with
- relieve the symptoms of fever and headaches
- not an anti-inflammatory substance (not appropriate for arthritis or sprains)
- milder effect on the upper digestive tract than other OTC relievers (less irritating
to stomach lining, better for those with acid reflux disease, ulcers, etc)
- more dangerous than aspirin – (dosage and its amount are not very different)
. ibuprofen – Advil, Motrin, several pharmacy generics
- best product for pain resulting from inflammation (arthritis, sprains, sunburns)
- less irritation to esophagus and stomach lining than aspirin and naproxen
- better for those with ulcers or acid reflux disease
. naproxen (or naprosyn) - Aleve
- especially effective as an anti-inflammatory agent for arthritis, sprains, and other
- longer lasting - often for 8-12 hours instead of 4-8 hours for others
- may increase your risk of life-threatening heart or circulation problems (heart attack or
stroke). Do not use just before or after having heart bypass surgery.
Acetaminophen, Aspirin, Ibuprofen, and Naproxen, OH MY!!!!
- differ in side effects – short or long term
- one w/ role in treatment of heart disease
Common Herbicides for Turf and Landscape
Postemergence - roadleaf, grasses (graminicides), yellow nutsedge, non-selective
Common Herbicides for Turf and Landscape: Preemergence Herbicides 13.
dithiopyr - Armortech CGC 40, Crab and Spurge Preventer, Dimension (2EW, EC, Ultra SC,
Ultra 40WP, Ultra WSP), Dynamo 40WSP, Lifeguard, Quaili-Pro Dithiopyr 0WSB,
- preemergence herbicide and very early POST on 3-leaf growth stage crabgrass
- PRE control annual grasses including annual bluegrass, barnyardgrass,
crabgrass, downy brome, yellow foxtail and sandbur.
- PRE control of broadleaf weeds including carpetweed, henbit, purslane,
shepardspurse, spurge, and woodsorrel (yellow & creeping)
prodiamine - Barricade (4FL, 65WG), Calvalcade 65WDG, Echelon 45SC (combination with
sulfentrazone, Guardrail 65WDG, Knighthawk, Quail-Pro Prodiamine 65WDG, Stonewall
65WDG, Primeraone Prodiamine 65WDG, Proclipse (4F, 65WDG), Resolute 65WDG,
- very low water solubility, and is strongly adsorbed to soil.
- PRE control of crabgrass, goosegrass, annual bluegrass and other annual grasses.
- PRE control of broadleaf weeds including carpetweed, chickweed, henbit, purslane,
pendimethalin - Pendulum (2G, 3.3EC, AquaCap), Pre-M 3.3EC,
on-fertilizer formulations (Halts, Pre-M)
- low water solubility, and is strongly adsorbed to soil. low potential for leaching.
- PRE control of crabgrass, barnyardgrass, yellow foxtail, annual bluegrass and
- PRE control of broadleaf weeds including chickweed, prostrate knotweed, purslane,
isoxaben – Gallery, Snapshot (isoxben + trifluralin for nursery and landscape)
- only compound available exclusively for preemergence control of broadleaf weeds
- PRE control of a wide range of broadleaf weeds including black medic, carpetweed,
dandelion, henbit, plantain, purslane, red sorrel, spurge, white clover, yellow
trifluralin – Preen, Treflan, component of Team & Snapshot
- bagged mulch with trifluralin add, degraded by the time it is needed
annual bluegrass, barnyardgrass, carpetweed, chickweed, crabgrass, foxtail,
goosegrass, henbit, knotweed, lambsquarters, pigweed and sandbur
18 & 19.
Should they go on top or under mulch? 20.
Common Herbicides for Turf and Landscape: Postemergence Broadleaf Herbicides 21
. dicamba - Vanquish, Banvel, in many combination broadleaf herbicide products (Trimec,
Eliminate, Coolpower, Horsepower, Q4, T-Zone, Trupower)
- weeds curl and twist soon after application
- avoid drift to desirable plants, particularly flowers, ornamentals, and other BRDLF plants
dicamba (cont’d) - Vanquish, Banvel, in many combination broadleaf herbicide products
(Trimec, Eliminate, Coolpower, Horsepower, Q4, T-Zone, Trupower)
- leaches readily and is soil active; applications within the dripline of trees should be
- controls red sorrel, violets, plantains, chickweed, groundivy, buttercup,
triclopyr - Battleship III, Eliminate, Coolpower, Horsepower, Turflon II Amine, T-Zone,
Turflon Ester, Three-way Ester II, Momentum FX2, Garlon (brush control)
- POST broadleaf weeds and has little or no activity on grasses.
- translocated and symtoms induces an epinastic (leaf curling) response and death in
- potential for leaching decreases as soil organic matter increases and when conditions
are favorable for soil microbial activity
- effective control of poison ivy, ground ivy, wild violets, and other difficult-to-control
clopyralid – Lontrel, component of combination broadleaf herbicide products (Confront,
- translocated herbicide and injury symptoms include the epinastic bending and twisting
- clopyralid products are restricted on residential turf. Treated clippings should not be
collected for mulching and composting (at a recycling facility).
- VERY EFFECT on members of the aster family (dandelion & hawkweed) and bean
family (clover, black medic & birdsfoot trefoil). Caution near ornamentals such
as aster, daisy, coneflower, redbud, and honey locust.
No control of plantains and evening primrose
Postemergence - grasses (graminicides)
Note for all: no control of broadleaf weeds and use caution around ornamental grasses
Postemergence - grasses (graminicides)
- annual grasses in broadleaf landscape ornamentals
- OTT - fluazifop-butyl, sethoxydim and clethodim:
- annual and perennial grasses in broadleaf landscape ornamentals
fenoxaprop-ethyl - Acclaim Extra, Bayer Advanced Crabgrass Killer for Lawns
- POST control of annual grassy weeds, crabgrass best before 1- to 2-tiller growth stage
- drought stress may significantly reduce the efficacy
- herbicide antagonism may occur when some broadleaf herbicides are tank-mixed with
or applied within a certain period of time and reduce the efficacy of fenoxprop.
- controls: crabgrass (large and smooth), goosegrass, barnyardgrass, yellow foxtail,
sandbur and Japanese stiltgrass (few others labelled for JS).
fluazifop-butyl - Fusilade II, Ornamec 170, Ornamec Over-The-Top Grass Herbicide
weeds: barnyardgrass,downy brome, fall panicum, sandbur, foxtail (giant & yellow)
goosegrass, quackgrass, crabgrass (smooth and large), witchgrass
-“over-the-top”, some species directed - juniper & azalea
sethoxydim - Segment, Vantage, Grass Getter,
Grass Beater Over-The-Top Grass Killer, Sethoxydim (SPC, G-Pro & E-Pro)
clethodim – Envoy, Envoy Plus, Cleo 26.4, Clethodim 2E
- perennial grass - better than other POST grass herbicides
quinclorac – alone (Armortech Quin Pro 75DF, Eject 75DF, Drive (75DF, XLR8), Primeraone
Quinclorac 75DF, Quali-Pro Quinclorac 75DF) and in Combinations (Solitare, OneTime, Q4,
- PRE and POST control of annual grass weeds and several broadleaf weeds.
- symptoms on broadleaf weeds include leaf and stem curl or twisting, and chlorosis.
Susceptible grasses demonstrate stunting and chlorosis, and gradual reddening
- POST treatments require addition of a methylated seed oil, crop oil concentrate
or high quality surfactant for best control.
quinclorac (cont’d) –
- applied POST will provide good to excellent control of crabgrass, yellow foxtail,
barnyardgrass, white clover, black medic, dandelion and speedwell.
- crabgrass control - before the 2-tiller and after the 5-tiller stage of growth.
- can be used before or after seeding or over-seeding of cool-season turfgrasses for the
control of crabgrass and other annual grasses.
- beware of fine fescue, especially when under stress
DRIVE label (use with respect to seeding of turfgrass species), review label 34.
Common Herbicides for Turf and Landscape: Postemergence Yellow Nutsedge Herbicides 35.
halosulfuron – Manage, Sedgehammer, several generics
- yellow nutsedge in early season, generally before mid- to late June, late give poor control
- 0.25 – 0.5% v/v nonionic surfactant, 1-2 quarts/ 100 gal of spray (high vol – 1 qt. max.)
sulfentrazone - Dismiss, Q4, Q4 plus, Surge, Eschelon 4SC (combination with pendimethalin)
- controls or suppresses yellow nutsedge
- control star-of-Bethlehem, emerging problem!!!!!!
Common Herbicides for Turf and Landscape: Non-selective postemergence
38. & 39.
- contact type - best on annuals, perennial weak, very quick acting
- pelargonic acid – Scythe, great as a sucker remover
- acetic acid, clove oil, citric acid, orange extr.
- not strongly translocated - annuals, perennials??
- glufosinate – Finale - less injury with drift, perennials weak
- glyphosate - Roundup Pro, Prosecutor, many generic others
- BEWARE - generics may perform differently
- caution to prevent “collateral damage” primarily from drift
Natural or Organic Products
Products contain: acetic acid, citric acid, clove oil, orange extract
- good spray coverage, mixed as percent spray volume - therefore inc. $
- many repeat applications on perennials
Advertisement states “Test shows that new herbicide containing vinegar will control Canada
thistle”. Original research looked at seedling Canada thistle - the seedlings of perennial
weeds can be controlled as if they were annuals.
Better on broadleaves than grasses due to location of growing points. 44.
orange extract, RTU - $ 8.95 for 24oz, concentrate - $60 for 1 gallon
- mix spray preparation 19, 25 or 50% v/v
20% or 200 grain acetic acid
- one gallon ready-to-use - $24.95 + shipping
- four one gallon jugs - $75.00 - free shipping
- eight one gallon jugs - $150.00 - free shipping
Non-selective Natural or Organic Products
- non-crop areas? - spot treatment in turf??
Common Herbicides for Turf and Landscape: New Herbicides 48.
mesotrione -TENACITY in turf
- mode of action: Mesotrione inhibits p-hydoxyphenyl pyruvate dioxygenase (HPPD) and
results in an indirect inhibition of carotenoid synthesis.
- symptoms in susceptible weeds include bleaching follow by necrosis.
- discovery of mesotrione was a result of the investigation of the allelochemical
leptospermone, which is produced by the roots of the “bottle brush” plant Callistemon
. Mesotrione is a synthetic analogues of leptospermone.
Label: EPA reduced risk pesticide
- mesotrione first labeled under the tradename Callisto for use in field corn, sweet corn,
popcorn, cranberries, blueberries and asparagus.
- received label for use in turf under the tradename Tenacity a couple of years ago, its use
was for golf courses and sod fields only.
-effective April 2010, a new label includes athletic fields, parks, commercial
Spring 2011?? residential turf? and at turf establishment?
Weed Activity: pre and post annual grasses
aminocyclopyrachlor, tradename: Imprelis
Label: Federal done, waiting for state approvals, MA approval March 16, 2011
Kentucky bluegrass, perennial ryegrass, fine fescue, tall fescue
low use rates: 0.047 to 0.094 lb acid/A, apparent synergism with fenoxaprop
Thank you for your attention!!
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