Annual Herbicide Spraying Program

Each year, Ontario County performs two types of vegetation control: Herbicide spraying under guide rails and around signposts along County roads and invasive species spraying to combat Japanese Knotweed within the right-of-way.

Please see the information below pertaining to each type of vegetation control.

Mapping

The Department of Public Works has created an interactive online mapping application to illustrate the vegetation control data.  This mapping application shows:
1.) County delineated 'No Spray Zones'.  Herbicide is sprayed under guide rails and around signposts annually on all county roads unless a request is made by a constituent.  Therefore, the interactive map only illustrates zones which are not sprayed annually, and;
2.) Locations of all known Japanese Knotweed.  The Knotweed locations are updated each year depending on whether new areas are found or old areas have permanently died off.

The mapping application can be viewed here: Mapping Application

Static .pdf maps can be viewed through the application by clicking on linear zones or delineator points. 

Herbicide Spraying - County Guide Rail and Signposts


The Ontario County Department of Public Works applies herbicide along county highways for the purpose of controlling vegetation growing under guide rails and around signposts where it is undesirable and uneconomical to maintain by mechanical means.  Control of vegetation along highways is also necessary to provide motorists with satisfactory visual awareness.

Click here for the official public notice.  Here you will find instructions on how to request that your location not be sprayed.

2019 Spraying


Ontario County has hired DeAngelo Brothers, LLC, with offices at 100 N. Conahan Drive, Hazelton, PA 18201, NYSDEC Pesticide Business Registration No. 08791, to apply the herbicide.

HERBICIDE APPLICATION:  A diluted herbicide mixture will be sprayed at the prescribed locations between June 10, 2019 and June 24, 2019.

Materials Being Applied (clink the links for the respective product labels and safety data sheets for more information):

Accord XRT II by Dow AgroSciences, EPA Registration No. 62719-556;
Active ingredient:  Glyphosate
Product Label l Safety Data Sheet
Oust Extra by Bayer Environmental Science, EPA Registration No. 432-1557;
Active ingredient:  Sulfometuron methyl
Product Label l Safety Data Sheet
NU-FILM-IR by Miller Chemical & Fertilizer Corp.; surfactant
Product Label l Safety Data Sheet
Milestone VM Herbicide by Dow AgroSciences, EPA Registration No. 62719-537;
Active ingredient:  Triisopropanolamine
Product Label l Safety Data Sheet

Persons who have surface water sources, particularly dug wells within the highway right of way should contact the Ontario County Department of Public Works  at (585) 396-4000 before May 11, 2019, or DeAngelo Brothers, LLC at 1-888-300-3988, extension 1202 for Stephen Gregory, so the sites can be inspected.

Residents may call Ontario County at (585) 396-4000 during normal business hours with any questions about the vegetation management program.

Further information about the products that will be applied, including any warnings that appear on the labels of such pesticides (herbicides), which may be pertinent to the protection of humans, animals or the environment, can be obtained by calling the National Pesticides Information Center at 1-800-858-7378 or the New York State Department of Health Center for Environmental Health Information Line at 1-800-458-1158.

Invasive Species Spraying - Japanese Knotweed

The Ontario County Department of Public Works applies pesticide (herbicide) along County highways to control plant invasive species within the right-of-way.  Herbicide is applied to selected areas of the right-of-way which include but are not limited to roadsides, ditch banks, and bridge abutments where invasive species are present or are known to have existed.  Control of invasive plant species along public highways is necessary to provide motorists with satisfactory visual awareness.

Residents may call the Ontario County Department of Public Works at (585) 396-4000 with any questions about the invasive species management program.

Click here for the official public notice

2019 Spraying

Ontario County has hired DeAngelo Brothers, LLC, with offices at 100 N. Conahan Drive, Hazelton, PA 18201, NYSDEC Pesticide Business Registration No. 08791, to apply the herbicide.

HERBICIDE APPLICATION:  A diluted herbicide will be sprayed at locations described above between September 16, 2019 and September 27, 2019.

Materials Being Applied (click the links for the respective product label and safety data sheet for more information): 

Rodeo by DOW AgroSciences
EPA Registration No.62719-324
Active Ingredient:  Glyphosate
Product Label l Safety Data Sheet

Further information about the product that will be applied, including any warnings that appear on the label of such pesticide (herbicide), which may be pertinent to the protection of humans, animals or the environment, can be obtained by calling the National Pesticides Information Center at 1-800-858-7378 or the New York State Department of Health Center for Environmental Health Information Line at 1-800-458-1158.