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Montgomery Parks Integrated Pest Management Program & Pesticide Use

Flameweeding Weeds in Warning Track for Player Safety (002)
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Integrated Pest Management Program and Pesticide Use

Montgomery Parks manages more than 37,000 acres of parkland including 420 parks, 275 playgrounds, 362 athletic fields, and many other amenities. The Department follows Integrated Pest Management (IPM) principles to steward resources and protect them from pests (weeds, insects, animals, and diseases) that may harm people or plants, impair function, and deteriorate infrastructure. IPM means managing pests by combining multiple strategies and techniques such as mechanical removal of pests, cultural methods to improve soil and plant health, conserving and introducing beneficial biological controls, and using pesticides.

The Parks Department does not use pesticides for cosmetic purposes. Pesticides are used as a last resort to control noxious and invasive pests, maintain safe and playable athletic fields and courts, and prevent significant economic damage, including degradation of park infrastructure.

Staff who apply pesticides and fertilizers are certified and registered with the Maryland Department of Agriculture. Montgomery Parks is committed to balancing the demand for recreation while protecting and conserving our valuable natural and cultural resources to meet the needs of current and future generations.

What is Montgomery County Code 33B?

County Code Chapter 33B went into effect July 1, 2016.  The code presents guidelines for pesticide use in Montgomery County, including on county property and parkland. The goal of the code “is to inform the public about pesticide applications and minimize the use of pesticides for cosmetic purposes, while not restricting the ability to use pesticides in agriculture, for the protection of public health, or for other public benefits.”  Learn more about Montgomery County’s pesticide law.

What is Montgomery Parks doing to comply with the law? 

Montgomery Parks continues to implement IPM strategies to ensure pesticides are used as a last resort.   Montgomery Parks manages all playgrounds, community gardens and common lawn areas within local parks without the use of pesticides.  In 2016, Montgomery Parks designated ten pesticide-free parks. In 2019, the program expanded to 45 pesticide-free parks and in 2022, the program expanded further to include 55 pesticide-free parks. To manage pests in parks that are designated pesticide-free, staff use alternative methods, such as hot foam, string trimming, mechanical weed removal, and products approved for use by Montgomery County Code 33B. The Montgomery County Department of Environmental Protection examples of products allowed in pesticide-free parks under the law.

The below table includes a schedule of upcoming pesticide applications.*  The list is updated to provide at least 48-hour notice for applications.

*Montgomery Parks staff make every effort to notify the community on this webpage when a pesticide application is scheduled in a public area. Dates of applications may change or be canceled due to weather; also, occasional emergency applications may be needed.

Park NamePlanned Application Date RangePlanned Application TimeArea To Be TreatedApplication Details
Hoyles Mill Conservation Park5/6 – 5/317:00a.m. to 5:00p.m.Forested area south of the main creek and west of Hoyles Mill Road/gravel trailRoundup Custom and/or Aquaneat will be applied to invasive weeds (Autumn olive, multiflora rose, Japanese barberry, wineberry, etc.) to restore habitat and protect ecosystem.
Little Bennett Regional Park5/13 – 5/317:00a.m. to 5:00p.m.Piedmont Trail, Little Bennett Creek (east of Prescott Road)Roundup Custom will be applied to invasive weeds (Japanese barberry, bittersweet, Japanese honeysuckle, etc.) to restore habitat and protect ecosystem.
Little Bennett Regional Park5/20 – 5/317:00a.m. to 3:00p.m.Forested area (south side of Western Piedmont Trail, adjacent to woodcock viewing meadow)Aquaneat and/or Garlon 3A will be applied to invasive weeds (bush honeysuckle, Autumn olive, wineberry, bittersweet, Japanese honeysuckle, etc.) to restore habitat and protect ecosystem.
Ovid Hazen Wells Recreational Park5/20 – 6/17:00a.m. to 5:00p.m.Fencelines (Red Wiggler Community Farm)Milestone will be applied to woody weeds to protect amenities and infrastructure.
Tilden Woods Stream Valley Park5/31 – 6/37:00a.m. to 3:00p.m.Forested area along stream bank (west side of main stream)Aquaneat will be applied to invasive weeds (Jetbead) to restore habitat and protect ecosystem.
Locust Grove Nature Center5/31 – 6/37:00a.m. to 3:00p.m.Forested area between main parking lot and nature center (along drainage)Aquaneat will be applied to invasive weeds (Jetbead, multiflora rose, bush honeysuckle, etc.) to restore habitat and protect ecosystem.
North Germantown Greenway Stream Valley5/20 – 6/37:00a.m. to 3:00p.m.Meadow behind residences along Fox Field Circle and Red Admiral Way (north side of paved trail but not near public access areas)Pathfinder will be applied to invasive weeds (Autumn olive, bush honeysuckle, Szechuan pepper tree, etc.) to restore habitat and protect ecosystem.
Agricultural History Farm Park5/20 – 6/37:00a.m. to 3:00p.m.Fencelines, around buildingsRanger Pro will be applied to invasive weeds to suppress plant growth.
Unity Neighborhood Park5/20 – 6/37:00a.m. to 3:00p.m.Tree rings, mulch bed, artworkRanger Pro will be applied to invasive weeds to suppress plant growth.
Rachel Carson Conservation Park5/20 – 6/37:00a.m. to 3:00p.m.Tree rings, mulch bed, gravel parking lotRanger Pro will be applied to invasive weeds to suppress plant growth.
Agricultural History Farm Park5/20 – 6/37:00a.m. to 3:00p.m.Hay field in front of barnGarlon 3A will be applied to invasive weeds to suppress plant growth.
Brookside Gardens5/28 – 5/308 a.m. – 12 p.m.Service Hill Center Bio bank edgeBifenthrin will be applied to insect pests to prevent harm to plants
Wheaton Athletic Area5/28 – 5/297 a.m. – 12 p.m.Wheaton Regional Athletic FieldsProsecutor Pro will be applied to broadleaf weeds to meet standards for play.
South Germantown Recreational Park 5/287 a.m. – 3 p.m. PondSeclear or Captain XTR will be applied to algae to restore habitat and protect the ecosystem.
South Germantown Recreational Park5/287 a.m. – 3 p.m. Pond shorelineAquanet, Diquat Herbicide, Komeen, or Flumigard will be applied to invasive weeds to restore habitat and protect the ecosystem.
Fountain Hills Local Park5/27 – 6/86 a.m. – 4 p.m.Tree bedsProsecutor Pro will be applied to annual grass weeds to protect amenities and infrastructure.
Woodstock Equestrian Special Park5/27 – 6/86 a.m. – 4 p.m.Back fenceProsecutor Pro will be applied to annual grass weeds to protect amenities and infrastructure.
South Gunner’s Branch Local Park5/27 – 6/86 a.m. – 4 p.m.Fence lineThree-way will be applied to woody weeds to protect amenities and infrastructure.
Waring Station Local Park 5/27 – 6/86 a.m. – 4 p.m.Fence lineThree-way will be applied to the fence line to protect amenities and infrastructure.
Little Seneca Stream Valley, Unit 15/27 – 6/86 a.m. – 4 p.m. Fence line brick paversProsecutor Pro will be applied to annual grass weeds to protect amenities and infrastructure
Germantown Town Center Urban Park 5/27 – 6/86 a.m. – 4 p.m. BedsThree-way will be applied to broadleaf weeds to protect plantings.
Germantown Town Center Urban Park 5/27 – 6/86 a.m. – 4 p.m. Beds/paversProsecutor Pro will be applied to selective grass and broadleaf weeds to protect amenities and infrastructure.
Germantown Town Center Park 5/27 – 6/86 a.m. – 4 p.m. Beds/paversSureguard will be applied to selective grass and broadleaf weeds to protect amenities and infrastructure.
Calverton Galway Local Park 5/28 – 5/317 a.m. – 12 p.m. FieldProsecutor Pro will be applied to selective grass and broadleaf weeds to suppress plant growth.
Rockwood Manor Special Park 5/307 a.m. – 2:30 p.m.Oak trees near mansionMectinite will be applied to oak trees to protect plantings from insect pests.
Edith Throckmorton Neighborhood Park5/30 – 5/317 a.m. – 2:30 p.m.Oaks near Elm StreetMectinite will be applied to oak trees to protect plantings from insect pests.
Capital View Homewood Local Park5/30 -5/317:30 a.m. – 2:30 p.m.Oak tree in islandMectinite will be applied to oak trees to protect plantings from insect pests.
Little Bennett Regional Park5/27 – 6/307 a.m. – 5 p.m. Forested floodplain on north side of Western Piedmont Trail, east of Prescott RoadRoundup Custom will be applied to natural areas to restore habitat and protect the ecosystem from invasive weeds.
Brookside Gardens6/3 – 6/77 a.m. – 4 p.m. Reflection terrace and Gude Garden islandPhyton will be applied to Japenese Black Pine to protect plantings from fungal disease.
Brookside Gardens6/3 – 6/77 a.m. – 4 p.m. Gude Garden and Viburnum GardenAquaneat will be applied to permanent planting beds to protect plantings from selective grass and broadleaf weeds.
Brookside Gardens6/3 – 6/77 a.m. – 4 p.m. Gude Garden and Gude Garden islandGarlon 3A will be applied to permanent planting beds to protect plantings from invasive weeds.
Blockhouse Point Conservation Park6/3 – 6/147 a.m. – 3 p.m. Forested natural area south of River Road and East of Blockhouse TrailAquaneat will be applied to invasive weeds to restore habitat and protect ecosystem.
Black Hill Regional Park 6/3 – 6/147 a.m. – 3 p.m. Forested floodplain between Cabin Branch Trail and Hamilton Trail Roundup Custom will be applied to invasive weeds to restore habitat and protect ecosystem.
Ovid Hazen Wells Recreational Park 6/2 – 6/87 a.m. – 5 p.m. Red Wiggler Community Farm areaMilestone will be applied to woody weeds to protect amenities and infrastructure.
Cabin John Stream Valley Park Units 1 and 26/3 – 6/147 a.m. – 3 p.m. Forested floodplain on west side of creek, between creek and base of hill Garlon 3A and/or Aquaneat will be applied to invasive weeks (Japanese knotweed) to restore habitat and protect ecosystem.
Cabin John Regional Park 6/3 – 6/147 a.m. – 3 p.m. Forested floodplain along eastern edge of creek, between creek and Cabin John Trail Garlon 3A and/or Aquaneat will be applied to invasive weeds (Japanese knotweed) to restore habitat and protect ecosystem.
Serpentine Barrens Conservation Park, North Unit6/3 – 6/287 a.m. – 3 p.m. Forested area north of Piney Meetinghouse Road, and east of powerline right of wayRoundup Custom will be applied to invasive weeds (Japanese stiltgrass) to restore habitat and protect ecosystem.
South Germantown Mini Golf and Splash Playground area6/3 – 6/146:30 a.m. – 2:30 p.m. Mini golf tree ringsCheetah will be applied to weeds and grasses to protect amenities and infrastructure.
South Germantown Recreational Park 6/3 – 6/146:30 a.m. – 2:30 p.m. Roadway and central park Cheetah will be applied to weeds and grasses to protect amenities and infrastructure.
Brookside Gardens6/3 – 6/76:30 a.m. – 3:30 p.m. Aquatic gardens and Fern gateAquaneat will be applied to invasive weeds to restore habitat and protect ecosystem.
Wheaton Regional Park Athletic Area6/107 a.m. – 12 p.m.Outfield turfTriplet SF will be applied to broadleaf weeds to meet standards of play.
Laytonia Recreational Park6/10 – 6/147 a.m. – 4 p.m.Field 2Tribute will be applied to broadleaf weeds to support plant or turf health.
Laytonia Recreational Park6/10 – 6/147 a.m. – 4 p.m.Field 4Fiesta will be applied to broadleaf weeds to support plant or turf health.
Takoma-Piney Branch Local Park6/10 – 6/217 a.m. – 5 p.m.Natural area on either side of boardwalk in southeast corner of the park.Garlon 3A and Roundup Custom will be applied to invasive weeds to restore habitat and protect ecosystem.
Fountain Hills Local Park6/10 – 6/216 a.m. – 4 p.m.Tree bedsProsecutor Pro and Sureguard will be applied to annual grass weeds to protect plantings.
Woodstock Equestrian Special Park6/10 – 6/216 a.m. – 4 p.m.Fence lineProsecutor Pro will be applied to annual grass weeds to protect amenities and infrastructure.
South Gunner’s Branch Local Park6/10 – 6/216 a.m. – 4 p.m.Fence lineThree-Way will be applied to woody weeds to protect amenities and infrastructure.
Waring Station Local Park6/10 – 6/216 a.m. – 4 p.m.Fence lineThree-Way will be applied to woody weeds to protect amenities and infrastructure.
Little Seneca Creek Stream Valley Unit 16/10 – 6/216 a.m. – 4 p.m.Fence paversProsecutor Pro and Sureguard will be applied to annual grass weeds to protect amenities and infrastructure.
Germantown Town Center Urban Park 6/10 – 6/216 a.m. – 4 p.m.Planting beds, paversThree-Way will be applied to broadleaf weeds to protect plantings.
Germantown Town Center Urban Park 6/10 – 6/216 a.m. – 4 p.m.Planting beds, paversProsecutor Pro and Sureguard will be applied to annual grass weeds to protect plantings.
Germantown Town Center Urban Park 6/10 – 6/216 a.m. – 4 p.m.Planting beds, paversProsecutor Pro and Sureguard will be applied to annual grass weeds to protect amenities and infrastructure.
Olney Manor Recreational Park6/10 – 6/216 a.m. – 2 p.m.Landscape beds, roadwaysCheetah will be applied to selective grass and broadleaf weeds to protect plantings.
Woodlawn Cultural Special Park6/10 – 6/216 a.m. – 2 p.m.Landscape beds, roadwaysCheetah will be applied to selective grass and broadleaf weeds to protect plantings.
Kemp Mill Urban Park6/118 a.m. – 12 p.m.PondsFlumigard and Rodeo will be applied to algae and Duckweed to maintain proper function.
Leaman Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 1Fiesta will be applied to broadleaf weeds to support plant or turf health.
Leaman Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 2Fiesta will be applied to broadleaf weeds to support plant or turf health.
Waring Station Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 1 (Youth)Fiesta will be applied to broadleaf weeds to support plant or turf health.
Waters Landing Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 1 Fiesta will be applied to broadleaf weeds to support plant or turf health.
Clarkmont Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field Fiesta will be applied to broadleaf weeds to support plant or turf health.
Fountain Hills Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 2Fiesta will be applied to broadleaf weeds to support plant or turf health.
Big Pines Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 1 (Youth)Fiesta will be applied to broadleaf weeds to support plant or turf health.
Blueberry Hill Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field Fiesta will be applied to broadleaf weeds to support plant or turf health.
Hunter’s Wood Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field Fiesta will be applied to broadleaf weeds to support plant or turf health.
Dufief Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 1 Fiesta will be applied to broadleaf weeds to support plant or turf health.
Dufief Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 2Fiesta will be applied to broadleaf weeds to support plant or turf health.
Aberdeen Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field Fiesta will be applied to broadleaf weeds to support plant or turf health.
Nike Missile Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 2Fiesta will be applied to broadleaf weeds to support plant or turf health.
Centerway Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field Fiesta will be applied to broadleaf weeds to support plant or turf health.
Mill Creek Towne Local Park6/11 – 6/147 a.m. – 4 p.m.Football/Soccer fieldFiesta will be applied to broadleaf weeds to support plant or turf health.
Fox Chapel Neighborhood Park6/11 – 6/147 a.m. – 4 p.m.Soccer field Fiesta will be applied to broadleaf weeds to support plant or turf health.
Moyer Road Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 1Fiesta will be applied to broadleaf weeds to support plant or turf health.
Clearspring Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 2Fiesta will be applied to broadleaf weeds to support plant or turf health.
Kings Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer fields 2, 3Fiesta will be applied to broadleaf weeds to support plant or turf health.
Clarksburg VIllage Local Park North6/11 – 6/147 a.m. – 4 p.m.Soccer field 1 (Youth)Fiesta will be applied to broadleaf weeds to support plant or turf health.
Ovid Hazen Wells Recreational Park6/11 – 6/147 a.m. – 4 p.m.Soccer fields 4, 5Fiesta will be applied to broadleaf weeds to support plant or turf health.
East Norbeck Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field Fiesta will be applied to broadleaf weeds to support plant or turf health.
Southeast Olney Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer fields 1, 2Fiesta will be applied to broadleaf weeds to support plant or turf health.
Manor Oaks Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer fields 1, 2Fiesta will be applied to broadleaf weeds to support plant or turf health.
Layhill Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 1Fiesta will be applied to broadleaf weeds to support plant or turf health.
Fairland Recreational Park6/11 – 6/147 a.m. – 4 p.m.Football/Soccer fieldFiesta will be applied to broadleaf weeds to support plant or turf health.
Flower Valley Neighborhood Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 1 (Youth practice)Fiesta will be applied to broadleaf weeds to support plant or turf health.
Bowie Mill Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer fields 1, 2Fiesta will be applied to broadleaf weeds to support plant or turf health.
Laytonsville Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 2 (Youth)Fiesta will be applied to broadleaf weeds to support plant or turf health.
Cherrywood Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 1Fiesta will be applied to broadleaf weeds to support plant or turf health.
Cedar Creek Local Park6/11 – 6/147 a.m. – 4 p.m.Soccer field 2Fiesta will be applied to broadleaf weeds to support plant or turf health.
Brookside Gardens6/128 a.m. – 4 p.m.Turf inside fenceDimension .15% will be applied to selective grass and broadleaf weeds to support plant or turf health.
Wheaton Regional Park6/178 a.m. – 10 a.m.Wheaton train tracksProsecutor Pro will be applied to broadleaf weeds to maintain proper function.
South Germantown Recreational Park 6/177 a.m. – 3 p.m.PondSeclear or Captain XTR will be applied to algae to restore habitat and protect ecosystem.
South Germantown Recreational Park 6/177 a.m. – 3 p.m.Pond shorelineAquaneat, Diquat Herbicide, Komeen, or Flumigard will be applied to invasive weeds to restore habitat and protect ecosystem.
South Germantown Recreational Park 6/17 – 6/217 a.m. – 2 p.m.Soccer fields 23, 24Revolver will be applied to grass weeds (ryegrass) to support plant or turf health.
Rockwood Special Park6/17 – 6/217 a.m. – 3 p.m.Landscape bedsSedge Hammer will be applied to nutsedge to protect plantings.
Maydale Conservation Park6/17 – 6/217 a.m. – 3 p.m.Landscape bedProsecutor Pro will be applied to invasive weeds to protect plantings.
Gene Lynch Urban Park6/17 – 6/247 a.m. – 5 p.m.Hornbeam treesBaseline will be applied to insect pests to support plant or turf health.
Ridge Road Recreational Park 6/17 – 6/247 a.m. – 3 p.m.Soccer fields 4, 5Revolver will be applied to grass weeds (ryegrass) to support plant or turf health.
The Lodge at Little Seneca Creek6/17 – 6/286 a.m. – 4 p.m.Beds courtsProsecutor Pro will be applied to annual grass weeds to protect amenities and infrastructure.
Owens Local Park6/17 – 6/286 a.m. – 4 p.m.Beds courtsProsecutor Pro will be applied to annual grass weeds to protect amenities and infrastructure.

On-site Signage Procedures:

  • White prenotification signs are placed in advance of an application to playing fields, managed turf and treatments within 25 feet of a stream or creek. The signs list the planned application date, product, and the reason for the application.
  • Yellow signs are installed at the site at the time of application and remain in place at least 48 hours following the pesticide application. For more information, call the phone number listed on the back of the sign.