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County of Morris / 2026 Mosquito Control
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Executive Summary
This document provides a comprehensive overview of the Morris County Division of Mosquito Control's program and services for the year 2026. It details the division's goals to reduce nuisance and disease-transmitting mosquitoes using various techniques, including water management, larval control, and adult control, while emphasizing environmental impact minimization. The document also includes public notices regarding area-wide pesticide applications scheduled annually from April to November, specifying the types of pesticides used (e.g., malathion, etofenprox, sumithrin, prallethrin) and application methods (truck, ATV, handheld, aircraft).
Key information includes detailed fact sheets for each primary adulticide (Anvil®, Duet Dual-Action®, Malathion), outlining their composition, usage, potential exposure risks, symptoms, and environmental persistence. It provides guidance for residents on how to reduce exposure and offers contact information for further inquiries about mosquito spraying, pesticide regulations, and general mosquito control activities. The overarching purpose is to inform residents about the county's mosquito control efforts and specific pesticide products.
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--- Document: County of Morris / 2026 Mosquito Control Document ---
Board of County Commissioners
Commissioner Director
Stephen H. Shaw
Commissioner Deputy Director
John Krickus
Douglas R. Cabana
Tayfun Selen
Thomas J. Mastrangelo
Christine Myers
Deborah Smith
COUNTY OF MORRIS
DEPARTMENT OF PUBLIC WORKS
MOSQUITO CONTROL DIVISION
P.O. Box 900
Morristown, New Jersey 07963-0900
County Administrator
Deena Leary
Director of Public Works &
County Engineer
Christopher J. Vitz, P.E.
973-285-6750
Fax: 973-539-3141
cvitz@co.morris.nj.us
Director, Mosquito
Control Division
Kristían McMorland
973-285-6450
kmcmorland@co.morris.nj.us
Municipalities are encouraged to share this information with all
residents in their community
THE MORRIS COUNTY DIVISION OF MOSQUITO CONTROL
The Morris County Division of Mosquito Control, founded in 1928 as the Morris County Mosquito
Commission, has the goal of reducing the number of nuisance and disease transmitting mosquitoes within the
County. The Division employs a number of techniques to provide this service to residents with minimal impact
on the environment. The program can be summarized as follows:
1) Water Management - The Division carries out extensive efforts to remove blockages from Morris County
waterways, and to maintain drainage systems as needed. Such work is done carefully, with environmental
impacts kept clearly in mind. This program helps reduce the use of insecticides needed to control mosquitoes.
2) Larval Control - Mosquitoes all start out in water as larvae, or "wrigglers". In areas where water
management is not feasible, larval control is necessary. Some locations are suitable for stocking with
mosquitofish, which provide continuous, biological control of mosquitoes. In other areas, larvicides may be
used to eliminate mosquitoes. We choose products that are specific for mosquitoes and have minimal or no
effect on other organisms in the aquatic environment for this purpose, and these are applied by trained staff
licensed by the NJDEP. All products are registered with both the USEPA and the NJDEP which mean they are
legal to use in NJ and are reviewed and recommended by the New Jersey Agricultural Experiment Station,
Cook College/Rutgers University. Locations receive treatment only when surveys show that large numbers of
mosquitoes are a threat to populated regions. These products are applied by hand crews, by all terrain vehicles,
or by helicopter. Larval habitats are treated only when larvae are present.
3) Adult Control - Although this is the most visible aspect of mosquito control, we consider this to be a last
resort. We try to stop mosquitoes before they are out and flying around. When adult control is needed because
of a severe mosquito infestation, we generally use truck mounted sprayers that apply 1/2 - 1 ounce of material
per acre. Sometimes, small hand sprayers are used to treat remote locations and possibly a helicopter might be
used to treat large areas in time of public health emergencies.
Homeowners can help control mosquitoes by making sure they do not have containers around the home that
hold water. Buckets, gutters, bird baths, toys, tarpaulins, and anything else than can contain water should be
emptied or removed from the yard. Do not dispose of leaves and grass clippings in ditches, streams or catch
basins. Make sure your screens are in good repair and consider moving inside during periods of high mosquito
Offices located at the Hanover Garage on 120 E. Hanover Avenue, Cedar Knolls, New Jersey 07927
activity (early evening and early morning).
The Morris County Division of Mosquito Control is constantly striving to improve our operations. These
efforts include employing new products that are more specific for mosquitoes, using new equipment that gets us
into problem areas more easily, and trying new methods for controlling mosquitoes. The employees of the
Division take their service to the public seriously and will work to serve Morris County residents with the best
possible mosquito control efforts.
Where can I find more specific information on mosquito spraying in Morris County, and how will I be
notified of the spraying?
Call the Morris County Division of Mosquito Control at 973-285-6450. Attached is an example of a newspaper
notice placed in the Daily Record, nj.com and the Morris County web page by the Morris County Division of
Mosquito Control throughout the mosquito control treatment season. A citizen has the right to ask the Morris
County Division of Mosquito Control for specific information about a planned application in the county prior to
that application.
If you have any questions about the Morris County Division of Mosquito Control, please let us know, or visit our
web site at www.morrismosquito.org.
2
Public Notice
In compliance with section 9.10 and 9.15 of the New Jersey Pesticide Control Code
(N.J.A.C. Title 7, Chapter 30), the Morris County Division of Mosquito Control, may be
applying pesticides for the control of adult mosquito populations on an area-wide basis,
as needed, throughout Morris County during the period of April xx - November xx,
202x.
The pesticides used will be those recommended by the New Jersey Agricultural
Experiment Station (NJAES) at Rutgers University for the control of adult mosquitoes,
including malathion (Fyfyanon ULV), etofenprox 20% (zenivex E20), sumithrin &
piperonyl butoxide (Anvil 2 + 2 or Anvil 10 + 10) or prallethrin, sumithrin & piperonyl
butoxide (Duet HD). Products will be applied from the ground by truck, all terrain
vehicle, handheld equipment or by aircraft using Ultra Low Volume techniques. All
applications will be made according to product labelling.
Contact the National Pesticide Information Center at 1-800-858-7378 for routine
pesticide inquiries. Call the New Jersey Pesticide Control Program at 1-609-984-6568
for pesticide regulation information, complaints and health referrals. In pesticide
emergencies, call the New Jersey Poison Information and Education System at 1-800-
222-1222.
Upon request, the Morris County Division of Mosquito Control shall provide a resident
with notification at least 12 hours before application, except for quarantine and disease
vector control activities, when conditions necessitate applications sooner than that time.
We prefer the request in writing, including name, street address and phone number of the
residence. Email addresses are also welcome. Updated, detailed information on adult
mosquito control applications and all mosquito control activities may be found at the web
site- www.morrismosquito.org, or by calling 973-285-6450. Those seeking further
information regarding the Morris County Division of Mosquito Control may contact
Kristian McMorland, Director, pesticide license #20262B at the Division at 973-285-
6450 or by mail at PO Box 900. Morristown, NJ,07963-0900.
Board of County Commissioners
Commissioner Director
Tayfun Selen
Commissioner Deputy Director
Stephen H. Shaw
Douglas R. Cabana
John Krickus
Thomas J. Mastrangelo
Christine Myers
Deborah Smith
COUNTY OF MORRIS
DEPARTMENT OF PUBLIC WORKS
MOSQUITO CONTROL DIVISION
P.O. Box 900
Morristown, New Jersey 07963-0900
County Administrator
Deena Leary
Director of Public Works &
County Engineer
Christopher J. Vitz, P.E.
973-285-6750
Fax: 973-539-3141
cvitz@co.morris.nj.us
Director, Mosquito
Control Division
Kristian McMorland
973-285-6450
kmcmorland@co.morris.nj.us
"AnvilⓇ"
This sheet answers some basic questions about a mosquito control product in use in Morris County. Morris
County Division of Mosquito Control, along with several other resources (listed at the end of this sheet), can
provide more detailed information.
What is Anvil® and how is it used?
Anvil® is an imitation mimic of a naturally occurring insecticide that is produced by certain chrysanthemum
flowers. It is an adulticide that is recommended for mosquito control in New Jersey by the Agricultural
Experiment Station of Rutgers University. It contains the active ingredients of “sumithrin and piperonyl
butoxide." The U.S. Environmental Protection Agency's (EPA) current evaluation considers sumithrin and
piperonyl butoxide- containing products to be slightly toxic with minimal potential risk to people when used
properly as part of a complete mosquito control program.
AnvilⓇ applications are made with Ultra Low Volume (ULV) equipment, which put out very small drops of the
material at very low levels. While habitat management and measures to control immature mosquitoes in water
are the preferred routine approaches, the spraying of adult mosquitoes is called for when biting populations
reach critical levels or when a disease organism is present in adult mosquitoes. The application of Anvil® will
only be conducted if deemed absolutely necessary. A very fine mist is sprayed into the air since flying
mosquitoes must directly contact the pesticide in order for it to be effective. Anvil®is not residual and breaks
down rapidly in sunlight, minimizing the buildup of this product in the environment.
How can I avoid exposure to Anvil®?
Risk to the general public from the use of Anvil® is minimal. Avoiding exposure is always the safest course of
action, particularly for populations that may be at higher risk such as pregnant women, children, the elderly and
those with chronic illness. Any possible exposure risk can be reduced by following some common sense
actions:
0
0
Pay attention to notices about spraying found through newspaper, websites, automated telephone
messages or distributed by municipal, county or state agencies.
Plan your activities to limit time spent outside during times of possible pesticide treatments.
Move children's toys out of application areas.
Move animals and their food and water dishes out of application areas.
Stay away from application equipment, whether in use or not.
Whenever possible, remain indoors with windows closed and with window air conditioners on non-vent
Offices located at the Hanover Garage on 120 E. Hanover Avenue, Cedar Knolls, New Jersey 07927
(closed to the outside air) and window fans turned off during spraying.
Avoid direct contact with surfaces that are still wet from pesticide spraying. Do not allow children to
play in areas that have been sprayed until they have completely dried (approximately one hour).
If you must remain outdoors, avoid eye and skin contact with the spray. If you get spray in your eyes or
on your skin, immediately flush and rinse with water.
What are the symptoms of exposure to Anvil®?
Irritation or sensitization sometimes occurs after exposure, causing an asthmatic condition or skin rash. The
chance of experiencing these symptoms of exposure with proper use is low. You should contact your physician,
other medical providers or the New Jersey Poison Information and Education System (NJPIES) at 1-800-222-
1222 if you experience these symptoms following a pesticide spraying. Bring this sheet with you if you visit a
physician or other medical provider.
How long will Anvil® last in the environment?
The Anvil® spray stays in the air for a short time until it lands on surfaces. Sumithrin has a low persistence
and lasts no longer than 25 days in water and soil. Sumithrin breaks down faster in sunlight.
Where can I get more information on Anvil®?
The following are resources for more information regarding Anvil® and mosquito control in your area (unless
otherwise noted, available during normal business hours):
For overall pesticide-specific information - 9:30am to 7:30pm:
National Pesticide Information Center
800-858-7378
http://npic.orst.edu
For pesticide health informat6ion & possible exposures - 24 hours:
New Jersey Poison Information & Education System
800-222-1222
http://www.njpies.org
For New Jersey pesticide regulation & misuse complaints:
NJDEP Pesticide Control Program
609-984-6568
http://www.state.nj.us/dep/enforcement/pcp/index.html
For Federal pesticide regulations:
USEPA Region 2 Office of Pesticide Programs
877-251-4575
http://www.epa.gov/ebtpages/pesticides.html
For state-wide mosquito control information:
NJDEP Office of Mosquito Control Coordination
609-292-3649
http://www.state.nj.us/dep/mosquito
For local mosquito control information:
Morris County Division of Mosquito Control
http://www.morrismosquito.org
973-285-6450
2
For mosquito control recommendations:
Rutgers University, Department of Entomology
http://www-rci.rutgers.edu/~insects/indexentonj.htm
848-932-9774
Clarke Mosquito Control (Manufacturer):
800-323-5727
http://www.cmosquito.com/product_detail.cfm?productid=5&searchbox=anvil
3
Board of County Commissioners
Commissioner Director
Tayfun Selen
Commissioner Deputy Director
Stephen H. Shaw
Douglas R. Cabana
John Krickus
Thomas J. Mastrangelo
Christine Myers
Deborah Smith
COUNTY OF MORRIS
DEPARTMENT OF PUBLIC WORKS
MOSQUITO CONTROL DIVISION
P.O. Box 900
Morristown, New Jersey 07963-0900
County Administrator
Deena Leary
Director of Public Works &
County Engineer
Christopher J. Vitz, P.E.
973-285-6750
Fax: 973-539-3141
cvitz@co.morris.nj.us
Director, Mosquito
Control Division
Kristian McMorland
973-285-6450
kmcmorland@co.morris.nj.us
"Duet Dual-Action® Adulticide"Ⓡ
This sheet answers some basic questions about a mosquito control product in use in Morris County. Morris
County Division of Mosquito Control, along with several other resources (listed at the end of this sheet), can
provide more detailed information.
What is Duet Dual-Action® adulticide and how is it used?
Duet Dual-Action® contains two pesticides called Prallethrin and Sumithrin, and a synergistic compound called
piperonyl butoxide which increases the effectiveness of the pesticides. Prallethrin and Sumithrin are members of
a category of pesticides called pyrethroids, which in turn are synthetic versions of pesticides produced by plants
called pyrethrins. Pyrethroid/piperonyl butoxide mixtures have been recommended for Ultra-Low-Volume
(ULV) mosquito control in New Jersey by Rutgers, The State University of New Jersey. The U.S. Environmental
Protection Agency's (EPA) current evaluation considers pyrethroid-containing products to be slightly toxic with
minimal potential risk to people when used properly as part of an integrated mosquito control program.
This pyrethroid-containing product is used for the control of adult mosquitoes. While habitat management and
measures to control immature mosquitoes in water are preferred and most used, the spraying of adult mosquitoes
is called for when biting populations reach critical levels or when a disease organism is present in adult
mosquitoes. A very fine mist is sprayed into the air since flying mosquitoes must directly contact the pesticide
in order for it to be effective. The combination of the two pesticides has been shown to produce what the
manufacturer calls 'benign agitation'. In other words mosquitoes are agitated from a resting state to a non-biting
flying state where they are more vulnerable to pesticide exposure. This makes Duet Dual-Action® adulticide more
effective against hard-to-control species like Aedes albopictus which typically rest during the evening hours when
adulticiding usually takes place.
How can I reduce my exposure to Duet Dual-Action®?
Because of the very small amounts of active ingredients released per acre, the risk to the general public from the
use of pyrethroid-containing products is minimal. Avoiding exposure is always the safest course of action. Any
possible exposure risk can be reduced by following some common sense actions:
Pay attention to notices about spraying found through newspapers, websites, automated telephone messages
or distributed by municipal, county or state agencies.
Plan your activities to limit time spent outside during times of possible pesticide treatments.
Offices located at the Hanover Garage on 120 E. Hanover Avenue, Cedar Knolls, New Jersey 07927
•
•
Move your pets, their food, and water dishes inside during ULV application. Also bring clothing and
children's toys inside.
Stay away from application equipment, whether in use or not.
Whenever possible, remain indoors with windows closed and with window air conditioners on non-vent
(closed to the outside air) and window fans turned off during spraying.
Avoid direct contact with surfaces that are still wet from pesticide spraying. Do not allow children to play
in areas that have been sprayed until they have completely dried (approximately one hour).
If you must remain outdoors, avoid eye and skin contact with the spray. If you get spray in your eyes or on
your skin, immediately flush and rinse with water.
What are the symptoms of exposure to Duet Dual-Action®?
Symptoms of over-exposure can include irritation to skin and eyes, respiratory and nasal irritation, irritability to
sound or touch, abnormal facial sensation, sensation of prickling, tingling or creeping of skin, numbness,
headache, dizziness, nausaea, vomiting, diarrhea, excessive salivation, and fatigue. The chance of experiencing
these symptoms of over-exposure with proper use is low. You should contact your physician, other medical
providers, or the New Jersey Poison Information and Education System (NJPIES) at 1-800-222-1222 if you
experience these symptoms following a pesticide spraying.
How long will Duet Dual-Action® last in the environment?
Pyrethroids have a soil half-life of 12 days. They have an extremely low pesticide movement rating because they
bind tightly to the soil. Pyrethroids are unstable in light and air. They rapidly degrade in sunlight at the soil surface
and in water. Piperonyl butoxide has a soil half-life of approximately 4 days.
Where can I get more information on this adulticide?
The following are resources for more information regarding Duet Dual-Action® and mosquito control in your area
(unless otherwise noted, available during normal business hours):
For overall pesticide-specific information - 9:30am to 7:30pm:
National Pesticide Information Center
800-858-7378
http://npic.orst.edu
For pesticide health information & possible exposures - 24 hours:
New Jersey Poison Information & Education System
800-222-1222
http://www.njpies.org
For New Jersey pesticide regulation & misuse complaints:
NJDEP Pesticide Control Program
609-984-6568
http://www.state.nj.us/dep/enforcement/pcp/
For Federal pesticide regulations:
USEPA Region 2 Office of Pesticide Programs
877-251-4575
http://www.epa.gov/ebtpages/pesticides.html
2
For state-wide mosquito control information:
NJDEP Office of Mosquito Control Coordination
609-292-3649
http://www.state.nj.us/dep/mosquito
For local mosquito control information:
Morris County Division of Mosquito Control
http://morrismosquito.org
973-285-6450
For mosquito control recommendations:
Rutgers University, Department of Entomology
http://www-rci.rutgers.edu/~insects
848-932-9774
Spraying for adult mosquitoes is a last resort. Most mosquito control work goes on "behind the scenes", using
water management, fish, and products to control immature mosquitoes in the water where they begin their life
cycle. Controlling adult mosquitoes is more difficult because they are spread out and moving.
3
Board of County Commissioners
Commissioner Director
Tayfun Selen
Commissioner Deputy Director
Stephen H. Shaw
Douglas R. Cabana
John Krickus
Thomas J. Mastrangelo
Christine Myers
Deborah Smith
COUNTY OF MORRIS
DEPARTMENT OF PUBLIC WORKS
MOSQUITO CONTROL DIVISION
P.O. Box 900
Morristown, New Jersey 07963-0900
County Administrator
Deena Leary
Director of Public Works &
County Engineer
Christopher J. Vitz, P.E.
973-285-6750
Fax: 973-539-3141
cvitz@co.morris.nj.us
Director, Mosquito
Control Division
Kristian McMorland
973-285-6450
kmcmorland@co.morris.nj.us
Malathion Fact Sheet
("Atrapa®" "Fyfanon®" "Microflo®")
What is malathion?
The above products all contain the pesticide malathion, a slightly toxic compound that is used in very small amounts to control adult
mosquitoes. Malathion is not residual (does not last long) and is applied with specialized equipment in a manner that maximizes
mosquito control but minimizes the impact on other organisms. The product is included in the insecticides recommended for adult
mosquito control list produced by Rutgers, the State University of New Jersey.
How does malathion work?
Malathion disrupts the nervous system of target organisms. In mammals, the product is broken down quickly, while in insects it is
broken down into other products that are fatal to them.
Is there danger to humans from this chemical?
Malathion is an organophosphate insecticide with very low toxicity for mammals. During mosquito control operations, the product is
applied at ½ to lounce per acre.
How is malathion applied?
Malathion is put out using Ultra Low Volume (ULV) equipment that produces droplets that are about 5 - 25 microns in size. There
are 24,000 microns in an inch. In Morris County, we have found that the lowest application rate, ½ ounce per acre, is adequate for
mosquito control. Malathion is broken down rapidly after application, and must contact flying mosquitoes directly to kill them.
Is malathion harmful to other insects?
Other insects may be harmed by malathion, so care must be taken to avoid beneficial insects, such as honeybees.
Malathion/2
How can I avoid exposure to malathion?
Exposure to malathion, even during spray operations, is minimal for the general public because of the small quantities used. There
are, however, steps that can reduce this exposure even further:
0
Note contact information regarding spraying in newspapers, published every 23 days during the mosquito season. Local
municipalities may also be contacted, since spray activities are coordinated with them.
Offices located at the Hanover Garage on 120 E. Hanover Avenue, Cedar Knolls, New Jersey 07927
•
•
•
•
•
Plan your activities to limit time spent outside during times of possible pesticide treatments (when mosquitoes are very high in
number, and usually in the evening).
Move your pets, their food, water dishes inside during a ULV application.
Stay away from application equipment, whether in use or not.
Whenever possible, remain indoors with windows closed and with window air conditioners on non-vent (closed to the outside air)
and window fans turned off during spraying.
Avoid direct contact with surfaces that are still wet from pesticide spraying. Do not allow children to play in areas that have been
sprayed until they have completely dried (approximately one hour). Very little settling of a ULV spray takes place, however, so
the chances of contacting malathion this way is minimal.
If you must remain outdoors, avoid eye and skin contact with the spray. If you get spray in your eyes or on your skin,
immediately flush and rinse with water.
Move children's toys out of application areas.
What are symptoms of exposure to malathion?
Symptoms of exposure can include headache, nausea, dizziness, excessive sweating, salivation, excessive tearing and a runny nose.
The chance of experiencing these symptoms of over-exposure with proper use is extremely low. You should contact your physician,
other medical providers or the New Jersey Poison Information and Education System (NJPIES) at 1-800-222-1222 if you experience
these symptoms following a pesticide spraying.
Where can I get more information on malathion?
For overall pesticide-specific information - 9:30am to 7:30pm:
National Pesticide Information Center: 800-858-7378
For pesticide health information & possible exposures - 24 hours:
New Jersey Poison Information & Education System:
800-222-1222
For New Jersey pesticide regulation & misuse complaints:
NJDEP Pesticide Control Program
:
609-984-6568
For Federal insecticide regulation:
USEPA Region 2 Office of Pesticide Programs: 877-251-4575
Malathion/3
Where can I get more information about local mosquito control?
The Morris County Division of Mosquito Control: 973-285-6450 or www.morrismosquito.org
For state-wide mosquito control information:
NJDEP Office of Mosquito Control Coordination: 609-292-3649
Spraying for adult mosquitoes is a last resort. Most mosquito control work goes on "behind the scenes", using water management,
fish, and products to control immature mosquitoes in the water where they begin their life cycle. Controlling adult mosquitoes is more
difficult because they are spread out and moving.
If you have questions about malathion or any other mosquito control related products or practices, please feel free to call the Morris
County Division of Mosquito Control at (973) 285-6450, or visit our web site at www.morrismosquito.org
2
For mosquito control recommendations:
Rutgers University, Department of Entomology
848-932-9774
Spraying for adult mosquitoes is a last resort. Most mosquito control work goes on "behind the scenes", using
water management, fish, and products to control immature mosquitoes in the water where they begin their life
cycle. Controlling adult mosquitoes is more difficult because they are spread out and moving.
If you have questions about Zenivex or any other mosquito control related products or practices, please feel free to call the Morris
County Division of Mosquito Control at (973) 285-6450, or visit our web site at www.morrismosquito.org
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