MARENGO HERBICIDE SPECIMEN LABEL GROUP

MARENGO HERBICIDE SPECIMEN LABEL GROUP
MARENGO
®
GROUP
HERBICIDE
29
HERBICIDE
SPECIMEN LABEL
Pre-emergent Herbicide for the Control of Annual Grasses,
Annual Sedges, and Broadleaf Weeds in Production Ornamentals, Conifers,
Christmas Trees, and Ornamental Production Sites and Hardscapes
DO NOT USE FOR THE MANUFACTURING OF FERTILIZER
ACTIVE INGREDIENT:
Indaziflam. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.4%
OTHER INGREDIENTS: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.6%
TOTAL: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100.0%
Contains 0.622 lbs. active ingredient per gallon
EPA Est No.: 071106-GA-003
EPA Reg. No.: 432-1518-59807
KEEP OUT OF REACH OF CHILDREN
FIRST AID continued
For TRANSPORTATION Emergencies ONLY
Call 24 Hours A Day 1-800-423-9300
IF INHALED
• If person is not breathing, call 911 or
an ambulance, and then give artificial respiration, preferably mouth-tomouth if possible.
For MEDICAL and PRODUCT USE Information Call
1-800-356-4647
CAUTION
• Call a poison control center or doctor for further treatment advice.
Have the product container or label with you when calling
a poison control center or doctor or going for treatment.
FIRST AID
IF SWALLOWED:
• Call a poison control center or doctor immediately for treatment advice.
Personal Protective Equipment (PPE):
Applicators and other handlers must wear long-sleeved shirt
and long pants, and shoes plus socks.
Follow manufacturer’s instructions for cleaning/maintaining PPE.
If no such instructions for washables exist, use detergent and
hot water. Keep and wash PPE separately from other laundry.
• Have person sip a glass of water if
able to swallow.
• Do not induce vomiting unless told
to do so by a poison control center
or doctor.
• Do not give anything to an unconscious person.
IF IN EYES:
• Hold eyes open and rinse slowly and
gently with water for 15-20 minutes.
ENGINEERING CONTROLS STATEMENTS
When handlers use closed systems or enclosed cabs in a manner that meets the requirements listed in the Worker Protection
Standard (WPS) for agricultural pesticides [40 CFR 170.240 (d)
(4-6)], the handler PPE requirements may be reduced or modified as specified in the WPS.
• Remove contact lenses, if present,
after the first 5 minutes, and then
continue rinsing.
• Call a poison control center or doctor for treatment advice.
IF ON SKIN OR
CLOTHING:
• Move person to fresh air.
• Take off contaminated clothing.
User Safety Recommendations
• Rinse skin immediately with plenty of
water for 15-20 minutes.
Users should wash hands before eating, drinking, chewing
gum, using tobacco or using the toilet. Remove
clothing/PPE immediately if pesticide gets inside. Then
wash body thoroughly and put on clean clothing.
• Call a poison control center or doctor for treatment advice.
FIRST AID continued next column
Net Contents: 0.5 Gallon (64 fl. oz. or 1.892 L)
1
ENVIRONMENTAL HAZARDS
NON-AGRICULTURAL USE REQUIREMENTS
This product is toxic to fish, aquatic invertebrates, and plants. Do
not apply directly to water, or to areas where surface water is present
or to intertidal areas below the mean watermark. Do not contaminate
water when disposing of equipment rinsate or washwater. This product may enter water through spray drift or runoff. Follow directions
for use to avoid spray drift and runoff. A level well maintained vegetative buffer strip between areas to which this product is applied
and surface water features including ponds, streams, and springs
will reduce the potential for getting into water from rainfall-runoff.
Runoff of this product will be reduced by avoiding applications when
rainfall is forecasted to occur within 48 hours.
The requirements in this box apply to uses of this product
that are not within the scope of the Worker Protection
Standard for agricultural pesticides (40 CFR Part 170). The
WPS applies when this product is used to produce agricultural plants on farms, forests, nurseries, or greenhouses.
Keep unprotected persons out of the treated areas until
sprays have dried.
PRODUCT INFORMATION
This product may enter water through drift of spray in wind. Follow
precautions for use to avoid wind spray drift.
MARENGO is a selective, pre-emergent alkylazine herbicide.
MARENGO provides extended residual control of many annual
grasses including crabgrass, goosegrass, and annual bluegrass,
as well as annual sedges, and broadleaf weeds in production
nursery including in-ground and pot-in-pot container grown ornamentals, conifers and Christmas trees, non-bearing fruit and nut
trees in nurseries, ornamental production facilities (such as shadehouses, hoophouses, and lathhouses) and hardscapes. MARENGO also demonstrates limited early post-emergent activity against
some weeds, including annual bluegrass, crabgrass and oxalis.
Surface Water Advisory: This pesticide may impact surface water
quality due to runoff of rain water. This is especially true for poorly
draining soils and soils with shallow ground water. This product is
classified as having a high potential for reaching surface water via
runoff for several months or more after application.
Ground Water Advisory: This pesticide has properties and characteristics associated with chemicals detected in ground water. This
chemical may leach into ground water if used in areas where soils
are permeable, particularly where the water table is shallow.
MARENGO controls weeds by reducing the emergence of
seedlings through inhibition of cellulose biosynthesis (CB
Inhibitor). Necrosis or chlorosis may be observed if the herbicide
is applied to herbaceous tissue such as leaves and green stems
of susceptible plants including sensitive ornamentals. MARENGO does not control plants emerging from tubers, rhizomes,
bulbs, corms, existing rootstocks, and woody vegetation.
MARENGO suppresses the development of some additional hardto-control weeds.
DIRECTIONS FOR USE
It is a violation of Federal Law to use this product in
a manner inconsistent with its labeling. Read entire label
before using this product.
Do not apply this product in a way that will contact workers or
other persons, either directly or through drift. Only protected
handlers may be in the area during application. For any requirements specific to your State or Tribe, consult the agency responsible for pesticide regulation.
MARENGO needs to be activated prior to weed germination for
most effective control. For maximum activity against germinating
weeds, MARENGO requires rainfall or irrigation prior to weed germination.
MARENGO is a highly active herbicide that provides effective
weed control when applied to the soil around many field grown
woody ornamentals. MARENGO may damage sensitive plants, if
the product is allowed to remain in contact with foliage. Carefully
apply MARENGO in strict accordance to the label. Be sure to follow all label restrictions.
AGRICULTURAL USE REQUIREMENTS
Use this product only in accordance with its labeling and
with the Worker Protection Standard, 40 CFR Part 170. This
standard contains requirements for the protection of agricultural workers on farms, forests, nurseries, and greenhouses,
and handlers of agricultural pesticides. It contains requirements for training, decontamination, notification, and emergency assistance. It also contains specific instructions and
exceptions pertaining to the statements on this label about
personal protective equipment (PPE) and restricted-entry
intervals. The requirements in this box only apply to uses of
this product that are covered by the Worker Protection
Standard.
PRODUCT USE RESTRICTIONS
• Do not exceed the maximum single application rates specified
under each use.
• Do not exceed 18.5 fl. oz. per acre of MARENGO for all applications within a 12 month period.
• Do not contaminate water intended for irrigation and domestic
use.
• Do not apply within 25 feet of ponds, lakes, rivers, streams,
wetlands, and habitat containing aquatic and semi-aquatic
plants when MARENGO is used on production nurseries, and
non-crop areas (excluding lawns).
Do not enter or allow worker entry into treated areas during
the restricted entry interval (REI) of 12 hours.
PPE required for early entry to treated areas that is permitted
under the Worker Protection Standard and that involves contact with anything that has been treated, such as plants, soil,
or water, is coveralls, waterproof gloves and shoes plus
socks.
• Do not apply MARENGO through an irrigation or chemigation
system.
• Do not apply MARENGO by air.
• Follow use precautions and restrictions on this label and for all
tank-mix partners, if mixing MARENGO with other pesticides.
• MARENGO is not for sale, distribution, or use in Nassau
County or Suffolk County in New York State.
Not all products are registered in all states; please verify state
registration of these products in your state before selling, distributing, or using.
2
DEACTIVATING MARENGO
Application Volume
Apply MARENGO in a minimum of 10 gallons of water per acre (1
quart of water per 1,000 sq. ft.) and ensure adequate coverage for
optimum weed control.
Activated charcoal has been shown to deactivate MARENGO if
applied within several days of application. Application of activated charcoal within 2 weeks of an application of MARENGO will not
reverse phytotoxic symptoms immediately, but it will aid in recovery over time. Follow directions for the amount of charcoal to
apply on the label of the activated charcoal.
IRRIGATION AND WATERING AFTER APPLICATION
To activate MARENGO for maximum herbicidal benefit, irrigate
within 2 days after application to move the herbicide into the soil.
With dry soil, use a minimum of 0.25 inches of irrigation water.
With soil at or greater than field capacity, the amount of irrigation
water should be reduced. In either case, do not create conditions
that cause visible run-off of irrigation water. Adequate rainfall following an application will negate the need for irrigation.
SPRAY DRIFT MANAGEMENT
Spray equipment and weather affect spray drift. Consider all factors when making application decisions. Where states have more
stringent regulations, they must be observed. Avoiding spray drift
is the responsibility of the applicator or grower. To reduce the
potential for drift, the application equipment must be set to apply
medium to large droplets (i.e., ASAE Standard 572) with corresponding spray pressure. Use high flow rate nozzles to apply the
highest practical spray volume. With most nozzle types, narrower
spray angles produce larger droplets. Follow the nozzle manufacturer’s directions on pressure, orientation, spray volume, etc., in
order to minimize drift and optimize coverage and control.
MIXING AND COMPATIBILITY
Mixing Instructions
MARENGO should be added to the tank and agitated, prior to
introduction of another pesticide. Mix the amount of MARENGO
needed for immediate application needs. Settling can occur if the
spray mixture is allowed to sit over an extended period of time.
Re-agitate the spray solution before application.
Wind
Avoid making applications when spray particles may be carried by
air currents to areas where sensitive crops and plants are growing.
Do not spray near sensitive plants if wind is gusty, below 2 mph,
or in excess of 10 mph and moving in the direction of adjacent
areas of sensitive crops or plants. Do not apply during temperature inversions. Always make applications when there is some air
movement to determine the direction and distance of possible
spray drift.
Compatibility Testing With Other Pesticides
MARENGO is generally compatible with many pesticides and liquid fertilizers. A compatibility test should be conducted with any
potential tank-mix partner with MARENGO. Using a clear container, conduct the test as described below:
1. Fill the container three-quarters full with water.
2. Add the products to be tank-mixed in the following order: (a)
wettable powders (b) dry flowable, (c) aqueous suspensions,
(d) MARENGO*, (e) liquids, (f) solutions and emulsifiable liquid
concentrates, (g) micronutrients and liquid fertilizers.
Local terrain may influence wind patterns; the applicator should
be familiar with local conditions and understand how they may
impact spray drift. Boom or nozzle shielding can reduce the
effects of wind or air currents on drift. Verify that the shields do not
interfere with uniform deposition of product prior to application.
3. Shake or stir after each addition to mix thoroughly.
4. After adding all ingredients, let the mixture stand for 15 minutes
and look for separation, large flakes, precipitates, gels, and
heavy oily film or other signs of incompatibility.
Temperature Inversion
A surface temperature inversion (i.e., increasing temperature with
increasing altitude) greatly increases the potential for drift. Avoid
application when conditions are favorable to inversion. Presence
of ground fog is a good indicator of a surface temperature inversion.
5. If the compatibility test shows signs of incompatibility, do not
tank-mix the product tested with MARENGO.
* Note that a labeled spray rate for MARENGO should be used
in any compatibility test. Dilute from a concentrated suspension, or sample from a properly diluted spray solution.
Sensitive Areas
Sensitive areas to MARENGO are defined as bodies of water
(ponds, lakes, rivers, and streams), wetlands, habitats for endangered species, and non-labeled agricultural crop areas.
Applicators must take all precautions necessary to keep spray drift
from reaching sensitive areas.
SPRAYER CLEANUP PROCEDURE
Spray equipment used to apply MARENGO must be cleaned prior
to use on sensitive ornamentals, or injury may result. Before
and after using MARENGO, triple rinse all mixing and spray equipment, including tanks, pumps, lines, filters, screens, and nozzles
with a good quality tank cleaner on an approved rinse pad. Proper
PPE must be worn while cleaning. Follow the directions below.
Spray Drift Management (Ornamentals)
Apply MARENGO to dormant (prior to bud break) or actively
growing plants. In either case, the spray must be directed at the
base of the plant or away from the plant. Do not allow MARENGO
to come in contact with the foliage, as some leaf malformations or
discoloration may occur. Minimize contact with above ground
stems.
For each rinse cycle, complete the following:
• Completely drain the spray and mixing tanks.
• Rinse the spray tank inside and outside including all lines and
screens. A rotating cleaning nozzle may be beneficial to dislodge any product from the sides of the tank.
Spray Drift Management (Conifers/Christmas Trees)
For Christmas trees and conifers, direct the spray to the base of
the trees with a band or with a broadcast application. Do not allow
MARENGO to come into contact with the foliage.
• Fill the tank with water and cleaner.
• Circulate solution to ensure that the pumps, valves, and all
lines are flushed.
• Remove and clean all filters, screens, and nozzles.
APPLICATION INFORMATION
• Drain all cleaning solution and then rinse once more with
clean water.
Apply MARENGO with a properly calibrated sprayer according to
the manufacturer’s directions and check periodically to be certain
that the equipment is working properly prior to each use. Uniform
application is essential for satisfactory weed control. Avoid skips
for the best weed control.
• Visually inspect the filters, screens, and tank walls to ensure
that no product remains.
• Dispose of rinsate in an approved way.
3
RESISTANCE MANAGEMENT
Weeds Controlled or Suppressed by MARENGO** (continued)
MARENGO controls weeds by inhibiting cellulose biosynthesis.
Cellulose is a component in the formation plant cell walls.
MARENGO is classified as a Group 29 herbicide. No known
resistance to MARENGO exists, and there are no known instances
of cross-resistance between MARENGO and other classes of herbicides or other modes of action. Performance of MARENGO is
not affected by the presence of biotypes resistant to glyphosate,
triazines, ALS inhibitors, mitotic inhibitors, growth regulators, or
herbicides with other modes of action. Prolonged use of any herbicide with the same mode of action may lead to selection of resistant weed populations and a reduction in efficacy. Rotation of herbicides with an alternate mode of action can help prevent the
development and spread of resistant weed populations. If resistance to MARENGO is suspected, use a herbicide with an alternate mode of action. The decision to use a particular herbicide
should always be based on an IPM program and involve consideration of all cultural practices and other pesticides in use.
Longstalked phyllanthus
Phyllanthus tenellus
Mulberry weed
Fatousa villosa
Mustard, black*
Brassica nigra
Mustard, wild
Sinapis arvensis
Parthenium
Parthenium hysterophorus
Pigweed, prostrate
Amaranthus blitoides
Pigweed, redroot
Amaranthus retroflexus
Plantain, buckhorn
Plantago lanceolata
Plantain, paleseed
Plantago virginica
Prostrate knotweed
Polygonum aviculare
Prostrate spurge
Euphorbia maculate
Weeds Controlled or Suppressed by MARENGO**
Puncturevine
Tribulus terrestris
Broadleaf Weeds
Purslane, common
Portulaca oleracea
American black nightshade
Solanum americanum
Ragweed, common*
Ambrosia artimisiifolia
Bittercress
Cardamine sp.
Redmaids
Calandrinia spp.
Black medic*
Medicago lupulina
Sesbania, hemp*
Sesbania exaltata
Buckwheat, wild
Polygonum convolvulus
Shepherd’s-purse
Capsella bursa-pastoris
California burclover
Medicago polymorpha
Sida, prickly/teaweed*
Sida spinosa
Canada thistle, common
Circium arvense
Southern brassbuttons*
Cotula australis
Chickweed, common
Stellaria media
Sowthistle, annual
Sonchus oleraceus
Chickweed, mouse-ear
Cerastium vulgatum
Spurge, spotted
Euphorbia maculate
Clover, white
Trifolium repens
Sunflower*, common
Helianthus annuus
Corn speedwell
Veronica arvensis
Swinecress
Coronopus didymus
Cudweed, linear-leaf/purple
Gnaphalium purpureum
Tassel flower
Emilia sonchifolia
Curly dock
Rumex crispus
Tropic ageratum
Ageratum conyzoides
Dandelion, cat’s ear
Hypochoeris radicata
Velvetleaf*
Abutilon theophrasti
Dandelion, common
Taraxacum officinale
Vetch, purple*
Vicia benghalensis
Eclipta
Eclipta alba
Wild carrot*
Daucus carota
Evening primrose, common
Oenothera biennis
Willowherb
Epilobium brachycarpum
Evening primrose, cutleaf
Oenothera laciniata
Woodsorrel, yellow*
Oxalis Stricta
False chamomile*
Matricaria maritima
Woodsorrel / Oxalis*
Oxalis Sp.
Filaree, redstem
Erodium cicutarium
Florida pusley
Richardia scabra
Annual bluegrass/‘Poa’
Poa annua
Groundsel, common
Senecio vulgaris
Annual kyllinga
Cyperus sesquiflorus
Hairy fleabane
Erigeron bonariensis
Barnyardgrass, common
Echinochloa crus-galli
Hairy nightshade
Solanum sarrachoides
Cheatgrass
Bromus secalinus
Henbit
Lamium amplexicaule
Crabgrass
Digitaria sp.
Marestail
Conyza canadensis
Crabgrass, henry
Digitaria ciliaris
Kochia
Kochia scoparia
Crabgrass, large/hairy
Digitaria sanguinalis
Lambsquarters, common
Chenopodium album
Crabgrass, smooth
Digitaria ischaemum
Lawn burweed
Soliva sessilis
Doveweed
Murdannia nudiflora
Little mallow
Malva parviflora
Foxtail brome
Bromus rubens
London rocket*
Sisymbrium irio
Foxtail, giant
Setaria faberi
Grasses, Monocots, and Sedges
4
they are at least 1-year old (citrus) and 3-years old (all others).
Non-bearing trees are defined as trees that will not bear fruit until
at least 1 year after treatment.
Weeds Controlled or Suppressed by MARENGO** (continued)
Foxtail, green
Setaria viridis
Foxtail, yellow
Pennisetum glaucum
Goosegrass
Eleusine indica
Guineagrass
Panicum maximum
Kyllinga, fraqrant/annual
Kyllinga odorata
Mouse barley
Hordeum murinum
• Do not mix MARENGO into the soil. Cultivating or disturbing the
soil surface after application may reduce weed control activity.
• If transplanting mature plants listed as tolerant on this label into
soil treated with MARENGO within the preceding 12 months,
discard existing soil from the planting hole and add new soil
around roots to minimize effects on plant establishment.
• Do not use MARENGO on ornamentals being grown in a greenhouse.
Grasses, Monocots, and Sedges
• Do not use MARENGO on nursery seedbeds, rooted cuttings or
young plants in liners.
Nutsedge, purple*
Cyperus rotundus
Nutsedge, yellow*
Cyperus esculentus
Red brome
Bromus rubens
Rice flatsedge
Cyperus iria
Ryegrass, italian
Lolium multiflorum
Ryegrass, perennial
Lolium perenne
Sandbur
Cenchrus longispinus
• Do not apply MARENGO to herbaceous perennials (e.g., hosta)
while they are emerging or after they have emerged.
Sedge, annual***
Cyperus spp.
• Do not apply MARENGO over-the-top of ornamentals.
Tufted lovegrass
Eragrostis pectinacea
• Do not apply MARENGO to budded grafts or graft unions as this
could cause plant injury or death.
• Do not apply MARENGO to ornamentals growing in containers
except pot-in-pot ornamentals.
• Do not apply MARENGO to ornamental bulbs in production
fields.
• Do not apply MARENGO to ornamental bulbs in commercial
fields while they are emerging or after they have emerged.
*Weeds suppressed by MARENGO
• Do not apply MARENGO by air.
**Higher labeled rates should be used if weed pressure is
historically high or longer residual control is desired (See
Use Rates in the MARENGO chart). Weed control can also
be achieved with multiple applications of MARENGO. Do
not exceed a total of 18.5 fl. oz. per acre per year with multiple applications.
SYMPTOMS OF MARENGO INJURY ON ORNAMENTALS
MARENGO may injure sensitive ornamentals by damaging roots
or leaves. Plant foliage damaged by root absorption will appear
stunted, deformed, and may not recover. If MARENGO is allowed
to contact leaves, leaf symptoms including leaf spot, leaf discoloration, and leaf curl may appear. Symptoms appear within several days after application. Leaves formed after appearance of
symptoms may recover.
***MARENGO only controls sedges and annual kyllinga
emerging from seed. It does not control perennial sedge
emerging from nutlets or perennial forms of kyllinga.
Users must assess the severity of any symptoms on cultivars not
listed on this label, before proceeding with large-scale applications of MARENGO. The user assumes all responsibility for damage on cultivars not listed on this label.
ORNAMENTALS, CHRISTMAS TREES, AND
CONIFER PLANTATIONS
MARENGO may be applied for pre-emergent weed control in production ornamentals in outdoor nurseries, shadehouses, hoophouses, Christmas trees, and conifer plantations. Apply MARENGO as a directed spray, prior to weed seed germination to the soil
surface around dormant or actively growing ornamentals as listed
in the table below. Ornamentals should be established prior to
applying MARENGO.
PRODUCTION ORNAMENTAL USES
MARENGO provides up to 8 months of weed control with a single
application. The exact length of control depends on many environmental factors as well as the weeds to be controlled and the
weed pressure. Apply MARENGO as a directed spray to the soil
surface only to established (rooted) plants in the soil or in pots and
not to newly rooted cuttings/or seedling beds in production nurseries. Do not apply MARENGO to newly rooted cuttings/or
seedling beds. To avoid root damage, apply MARENGO around
transplants when the plant is well established and the soil has firmly settled around the root area. Irrigation or rainfall will help to settle the soil and seal surface cracks. Apply MARENGO around
dormant plants. If applied after dormancy, care should be taken
not to contact expanding buds or new leaves. Applications of
MARENGO should only be made to ornamentals listed on this
label. MARENGO should be applied to soil free of weeds, debris,
and soil clods for optimum efficacy. Herbicidal efficacy may be
reduced if soil is disturbed after application.
USE RESTRICTIONS FOR MARENGO ON PRODUCTION
ORNAMENTALS, CHRISTMAS TREES, AND CONIFERS
• Do not exceed the maximum single application rates specified
under each Ornamental use.
• Do not exceed a total of 18.5 fl. oz. of MARENGO per acre in a
12 month period.
• Do not allow spray to contact foliage. MARENGO may cause
localized injury to the foliage, especially young leaf tissue. If the
spray should contact the foliage, remove affected foliage or
wash off immediately.
• Do not use MARENGO around bedding plants (annuals and
herbaceous plants not specified, or not listed as tolerant on this
label).
Application of MARENGO to deciduous foliage or green bark may
result in unacceptable injury. Apply MARENGO to established
ornamentals. If the grower is uncertain about ornamental establishment after transplanting, wait 2 months before applying
MARENGO.
• Do not apply MARENGO during windy conditions where it might
contact desirable foliage.
• Do not use MARENGO around bearing fruit and nut trees.
MARENGO may be used around non-bearing trees or vines if
5
ORNAMENTALS AND THEIR CULTIVARS TOLERANT
TO MARENGO
AMOUNT TO USE: Apply MARENGO as a broadcast, directed
spray at 7.5-15.5 fl. oz. of MARENGO per acre (0.17-0.36 fl. oz.
per 1,000 sq. ft.) around ornamentals in 20-100 gallons of water
per acre (0.5-2.3 gallons of water per 1,000 sq. ft.). When applying MARENGO with a backpack sprayer, follow all above restrictions.
Tolerant ornamentals and their cultivars are listed in the following
table. If a cultivar to be treated is not listed on this label, treat several plants of the cultivar at the single maximum desired use rate
and evaluate 1 to 2 months later for possible injury and acceptable
tolerance. The user assumes responsibility for application on cultivars not listed in this table. If a plant type (designated by genus
and/or species) is not listed on this label, do not apply
MARENGO.
To activate MARENGO for maximum herbicidal benefit, irrigate
the area treated with MARENGO to move the herbicide into the
soil within 2 days after application. With dry soil, use a minimum
of 0.125-0.25 inches of irrigation water. With soil at or greater than
field capacity, reduce the amount of irrigation water. In either case,
do not create conditions that cause visible run-off of irrigation
water. Adequate rainfall following an application will negate the
need for irrigation.
ORNAMENTALS AND THEIR CULTIVARS TOLERANT
TO MARENGO
A subsequent application of MARENGO can be made within 90
days after the initial application provided that the maximum
allowed rate does not exceed 18.5 fl. oz. per acre in a 12 month
period.
COMBINATIONS OF MARENGO WITH NON-SELECTIVE HERBICIDES AROUND ORNAMENTALS
Remove existing weed growth before application of MARENGO or
use a post-emergence herbicide labeled for control. MARENGO
may be used in combination with a non-selective herbicide such
as Finale. Avoid contact of spray containing a non-selective herbicide with foliage, stems, green bark, or bare roots of trees,
shrubs, or other desirable vegetation, since severe damage may
result. If spraying areas adjacent to desirable plants with a nonselective herbicide, use a shield while spraying to help prevent
spray from contacting foliage of desirable plants.
Do not apply MARENGO to plant types not listed as tolerant on
this label. MARENGO may be applied to cultivars of listed tolerant plants that are not listed on this label. Prior to large-scale
applications, treat a small number of such plants at the desired
use rate. Treated plants should then be evaluated 1 to 2 months
after application for possible injury and acceptable tolerance.
IMPORTANT: Direct application of MARENGO to the soil surface
and away from plant foliage and bark. Avoid direct spray contact
on plant surfaces, foliage, and green bark or injury may result.
Application of MARENGO after bud swell may cause injury if herbicide contacts foliage. Avoid application under environmental
conditions that favor drift to non-targeted areas. Deep cultivation
reduces the effectiveness of MARENGO and should be avoided.
Common Name
Scientific Name
Cultivar
Abelia
Abelia grandiflora
Arborvitae
Thuja sp.
Green Giant
Arborvitae
Thuja sp.
Nigra
Azalea
Rhododendron sp.
Girard’s Rose
Azalea
Rhododendron sp.
Fashion
Azalea
Rhododendron sp.
VF 14
Azalea
Rhododendron sp.
Golden Torch
Azalea, Encore
Rhododendron sp.
Autumn Debutante
Black Tupelo
Nyssa sylvatica
Boxwood
Buxus microphylla
Green Beauty
Boxwood
Buxus microphylla
Baby Gem
Butterfly Bush
Buddleia
Nanho Blue
Camellia
Camellia japonica
Margaret Heathcliff
Pink
Camellia
Camellia sasanqua
Cleopatra Pink
Cedar, Atlantic white Chamaecyparis sp.
6
Cedar, Japanese
Cryptomeria japonica Black Dragon
Cedar, Japanese
Cryptomeria japonica Yoshino
Cotoneaster
Cotoneaster
Cypress, false
Chamaecyparis sp. Gold Mops
Cypress,
Mediterranean
Cupressus sempervirens
Elm, American
Ulmus americana
Florida Pipestem
Leucothoe populifolia
Forsythia
Forsythia
Fragrant tea olive
Osmanthus fragrans
Gardenia
Gardenia radicans
Radicans
Gardenia
Gardenia jasminoides
Mystery
Gardenia
Gardenia jasminoides
Frostproof
Green Ash
Fraxinus pennsylvanica
Hibiscus, Chinese
Hibiscus rosasinensis
San Diego Red
Holly, Chinese
Ilex cornuta
Needlepoint
Holly, Gallberry
Ilex glabra
Densa
Coral Beauty
Lynwood
ORNAMENTALS AND THEIR CULTIVARS TOLERANT
TO MARENGO (continued)
Common Name
Scientific Name
Cultivar
Holly, Meservae
Ilex meservae
Blue Princess
Holly, Sky Pencil
Ilex sp.
Sky Pencil
Indian Hawthorn
Raphiolepsis indica Pink Lady
Japanese Cleyera
Ternstromia gymnanthera
Japanese Mockorange
Pittosporum tobira
Variegata
Juniper, Bar
Harbour
Juniperus horizontalis
Bar Harbour
Juniper, Blue Pacific Juniperus conferta
Blue Pacific
MARENGO may be tank-mixed with products containing the following active ingredients labeled for use in conifers: glyphosate
or glufosinate (Finale). Do not apply tank-mixes of MARENGO
with these active ingredients to conifer and Christmas tree
foliage. Follow use restrictions on all labels.
NON-SELECTIVE USES
HARDSCAPES
MARENGO may be used to maintain bare ground in non-crop
areas. These include gravel areas as well as rocky/sandy areas.
All weeds and debris should be removed from the bed area to be
treated for optimum control. Observe all restrictions and tolerances for applications of MARENGO around ornamentals listed
on this label.
Apply 9 to 18.5 fl. oz. of MARENGO per acre with uniform coverage to target area. Use a minimum spray volume of 10-20 gallons per acre.
Juniper, Blue Rug
Juniperus horizontalis
Blue Rug
Lilac
Syringa x ‘Penda’
Bloomerang
Loropetalum
Loropetalum chinensis
Burgundy
Loropetalum
Loropetalum chinensis
Ruby
Maple, red
Acer rubrum
ORNAMENTAL PRODUCTION FACILITIES
Maple, sugar
Acer saccharum
Podocarpus
Podocarpus macrophyllus
Rose
Rosa sp.
Pink Knock Out®
Rose
Rosa sp.
Knock Out®
MARENGO may be used in ornamental production facilities such
as areas covered by landscape fabric, hoophouses, lathhouses
and shadehouses to provide bare ground and general weed control beneath benches and potted plants. MARENGO may injure
the foliage of ornamentals; prevent spray from contacting foliage.
Make applications to these sites during clean up, sanitation and
preparation prior to plant production. Apply 18.5 fl. oz. product
per acre with uniform coverage to target area. Use a minimum
spray volume of 20 gallons per acre.
Rose, Virginia
Rosa virginiana
Rose Mallow
Hibiscus
moscheutos
Rose of Sharon
Hibiscus syriacus
Viburnum,
Burkwood
Viburnum x burkwoodii
Viburnum, popcorn Viburnum plicatum
Wax myrtle, southern
If weeds are present at the time of application, tank-mix a postemergent herbicide such as Finale with MARENGO. Observe all
use restrictions on this label and on the label of the tank-mix partner. Adequate irrigation or rainfall after application of MARENGO
will provide maximum weed control.
If weeds are present at the time of application, tank-mix a postemergent herbicide such as Finale with MARENGO. Observe all
use restrictions on this label and on the label of the tank-mix partner. Water in MARENGO after application and allow applied surface to dry prior to introducing plants. For outdoor applications,
containers can be moved onto the treated ground bed areas after
irrigation or rainfall and once the treated surface has dried.
Pink Heart
Popcorn
Myrica cerifera
Do not mix with products containing chlorine bleach products.
When tank mixing with other products, it is the responsibility of
the end-user/applicator to ensure that the tank-mix partner is registered in the state for the application being made.
Do not use MARENGO on any of these plants, as injury
will occur.
Common Name
Scientific Name
Euonymus, Japanese
Euonymus japonicus
Hydrangea
Hydrangea macrophylla
CONIFERS AND CHRISTMAS TREES
MARENGO may be used for pre-emergence weed control in
conifer nurseries and Christmas tree farms. MARENGO may be
applied as a directed spray to soil surrounding established
plants.
Avoid contacting plant stems and leaves with the directed spray
solution as injury may occur. Established plants are transplants
that are actively growing and where the soil has settled. Do not
apply to seedlings or seedling beds. Apply 7.5-15.5 fl. oz. of
MARENGO per acre for these uses. Do not exceed 18.5 fl. oz.
of MARENGO per acre in a growing season.
7
IMPORTANT: READ BEFORE USE
STORAGE AND DISPOSAL
Read the entire Directions for Use, Conditions, Disclaimer of
Warranties and Limitations of Liability before using this product. If
terms are not acceptable, return the unopened product container
at once.
Do not contaminate water, food or feed by storage or disposal.
PESTICIDE STORAGE
Store in original container only. Store in a manner to prevent
cross-contamination of other pesticides, fertilizer, food, and
feed. Do not store in or around the home. Store in a dry,
locked storage area.
By using this product, user or buyer accepts the following
Conditions, Disclaimer of Warranties and Limitations of Liability.
CONDITIONS: The directions for use of this product are believed
to be adequate and must be followed carefully. However, it is
impossible to eliminate all risks associated with the use of this
product. Crop injury, ineffectiveness or other unintended consequences may result because of such factors as weather conditions, presence of other materials, or the manner of use or application, all of which are beyond the control of OHP, Inc. All such
risks shall be assumed by the user or buyer.
PESTICIDE DISPOSAL
Wastes resulting from the use of this product must be disposed of on site or at an approved waste disposal facility.
CONTAINER HANDLING
Non-refillable container. Do not reuse or refill this container.
Offer for recycling, if available. Triple rinse container (or
equivalent) promptly after emptying. Triple rinse as follows:
Empty the remaining contents into application equipment
or a mix tank and drain for 10 seconds after the flow begins
to drip. Fill the container 1/4 full with water and recap.
Shake for 10 seconds. Pour rinsate into application equipment or a mix tank or store rinsate for later use or disposal.
Drain for 10 seconds after the flow begins to drip. Repeat
this procedure two more times. Then puncture and dispose
of in a sanitary landfill or by other procedures approved by
State and local authorities.
DISCLAIMER OF WARRANTIES: TO THE EXTENT CONSISTENT
WITH APPLICABLE LAW, OHP, INC. MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY OR OF
FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE, THAT
EXTEND BEYOND THE STATEMENTS MADE ON THIS LABEL. No
agent of OHP, INC. is authorized to make any warranties beyond
those contained herein or to modify the warranties contained herein. TO THE EXTENT CONSISTENT WITH APPLICABLE LAW, OHP,
Inc. DISCLAIMS ANY LIABILITY WHATSOEVER FOR SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING
FROM THE USE OR HANDLING OF THIS PRODUCT.
LIMITATIONS OF LIABILITY: TO THE EXTENT CONSISTENT WITH
APPLICABLE LAW THE EXCLUSIVE REMEDY OF THE USER OR
BUYER FOR ANY AND ALL LOSSES, INJURIES OR DAMAGES
RESULTING FROM THE USE OR HANDLING OF THIS PRODUCT,
WHETHER IN CONTRACT, WARRANTY, TORT, NEGLIGENCE,
STRICT LIABILITY OR OTHERWISE, SHALL NOT EXCEED THE
PURCHASE PRICE PAID, OR AT OHP, INC. ELECTION, THE
REPLACEMENT OF PRODUCT.
Marengo and Finale are registered trademarks of Bayer.
Product of Germany.
Produced for:
OHP, Inc.
P. O. Box 230
Mainland, PA 19451
(800) 356-4647
OHP985645
ESL082212N REV102212.
8
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