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       Oct. 14, 2019                 
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Silver City has updated its annual Parks and Activity Directory, a booklet with information for all ages about all kinds of activity opportunities available in Silver City. Learn more!

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Town of Silver City
Box 1188
Silver City, NM 88062

Vector Management Plan
The Town OF Silver City has adopted a pro-active intervention plan for the control of mosquitoes. Our Town is actively monitoring breeding sites for mosquitoes and eliminating the source. Standing water is being treated with larvicides which kill mosquito larva. The sewer system is being treated with larvicides, as well as the Golf Course and water catch basins. Mosquito eating fish are being applied to areas of the Big Ditch, PA Creek, Golf Course and other appropriate bodies of water. Problem drainage areas are being investigated. These measures began in April and will continue throughout the summer until the first frost.

Since old tires are perfect breeding grounds for mosquitoes, the Town would like to remind you that there is no charge when you take old tires to the dump. Just tell them at the gate that you have old tires and they will have you unload them in a special place. The City bales them and uses them for erosion control. In May, the City began trapping and monitoring adult mosquitoes in conjunction with the State Office of Epidemiology. The State Lab helps in the identification of mosquito species, whether they are males or females (only females bite) and the presence of West Nile Virus in those mosquitoes. Samples are sent to the State Lab every 2 weeks for testing and will continue until the first frost. See the section on Adulticiding for protocols and procedures should spraying become necessary. Call the City Offices if you think you have a mosquito problem. Have a safe summer and help fight the bite!


1. The City will appoint a town employee to implement and oversee the Mosquito Management Control Recommendations. With assistance from other city departments, this individual will monitor mosquito breeding habitats, apply larvicides, monitor adult mosquitoes, interface with the State for testing adult mosquitoes, and keep accurate records of all action taken.

2. The Town Manager will be responsible for making all necessary arrangements to comply with the Notification Recommendations, if and when fogging becomes necessary.

3. Public Education will be continued through 2004 by the Vector Control Task Force, but will become the responsibility of The City for future years.

4. The City will budget sufficient funds for larval and adult mosquito monitoring and for the application of larvicides.

5. The City will make contingent budgetary plans in the event that it decides to implement a fogging program, whether by buying and using its own equipment or seeking a private contractor.

6. The City will allocate a summer seasonal position to help with implementation of this plan.


1. The City will continue to fund and implement a public education campaign of printed materials regarding:
     a: facts About West Nile Virus and how to protect oneself
     b. how to eliminate mosquito habitats in your yard
     c. information on City notification plans for fogging; no spray lists; emergency numbers.

2. The City will hold public forums to discuss city policies regarding mosquito control and keep the public informed as to all actions, surveillance data, and progress, and status involving an Integrated Mosquito Management Plan.

3. Public Education will begin in March and will continue until October Below is a list of educational activities that are already underway or planned.

*Public Service Announcements: KNFT - KNUW - KSCQ - The Ranch - CATS TV 2 films WNV Rotary Club and Do Mosquitoes Love Your Yard

*Website for WNV information: www.silvercity.net/vctf
*Mail Box Recording: with message regarding developments and actions taken. (larvicides trapping of adults, results etc.) Notification should spraying become necessary: phone number 534-6363


Survey and map the city for mosquito breeding sites and potential adult mosquito habitat.
Closely monitor problem areas for mosquito activity, (adult and larval)
Keep accurate records including maps of breeding sites, larvicide programs and adult activity
Use least toxic treatments first and focus on preventing adult mosquito populations
Evaluate success


1. Implement an active larvicide program that spans from May through September. This program will continue to identify and map mosquito breeding areas and apply the necessary larvicides on a regular basis throughout the breeding season. To enable this, a city employee must be available to monitor and apply the application of larvicides. Larvicides will be chosen on the basis of appropriateness for the task: example: Biological larvicides in natural waterways and on their cost effectiveness (priority given to long lasting larvicides that are easy to apply).
Larvicide priorities will include but not be limited to:

    a. All waterways and tributaries entering and passing through the town of Silver City
    b. Regular inspection and application of larvicides to problem areas of the sewer system
    c. Post rainfall larvicide application to overflow and holding ponds
    d. Regular maintenance of the Golf course holding ponds

2. Bacillus thuringiensis will be the control agent of choice for all natural waterways. Bacillus sphaericus may be used in highly polluted or organic waters (such as the sewers). IGRS may be used in certain cases where the application of Bti or Bs is impractical, such as in large ponds, or when used as a spray in hard to reach locations. Temephos (alcohol based larvicides and monomolecular surface films WILL NOT be used on natural waterways as they interfere with the lifecycles of non-target aquatic life.

3. An active biological control, the mosquito larvae eating fish, Gambusia, will be stocked this year (2004) in all appropriate waterways. In subsequent years, these waterways will be monitored and sampled for sustaining populations. Gambusia will be re-stocked if necessary. The city will maintain a breeding population of Gambusia for future needs.


1. A six month (yearly) source reduction production program that focuses on eliminating mosquito breeding sites. This includes but is not limited to:
    a. Elimination of obstructions and debris in natural waterways that inhibit the normal flow of water
    b. Reduction and elimination of tire dumps including those on private lands
    c. Investigation and rehabilitation of old and broken manhole covers; including installing removable plugs in manhole covers and modernizing covers. (Spraying for adult mosquitoes in sewers will be continued)
    d. Continued prioritization for street cleaning that controls standing water


1. The City will enforce all local ordinances, and state and federal law (including the Mosquito Abatement Act) that relate to standing water. These actions will be implemented by the City Code Enforcer who will help to educate private citizens and business owners regarding modifying mosquito habitat and utilizing user friendly larvicides (Bti) to control mosquitoes.


1. Because the decision to adulticide is likely to be a controversial one, the task force recommends that a three person board be responsible for following through on the recommendations. This three person board will monitor the progress of the adult monitoring program and will utilize the recommendations in deciding if and when to use adulticides in Silver City. We believe this will keep rash or ill-advised decision making out of the equation and lead to a more responsible and scientifically based process for assessing the risk of WNV to our community.

We recommend that the board be made up of Town Manager in cousultation with the Town Counsul and Eddie Mendoza, (the town employee tasked with implementing this plan), and one member of the Vector Control Task Force.

2. Monitor adult mosquitoes beginning in June through September. The use of light traps early in the season and then Gravid traps later in the season is recommended. During the height of the season, at least four traps should be used in adult mosquito habitat closest to densely populated areas. Trapping should occur at least bi-weekly or more if positive results deem it advisable. Trapping results will be sent to the state for ID and WNV screening program following state protocols. The results of these screening will be shared among the three member board and presented to the public when necessary.

3. The decision to adulticide should be based on the following parameters:     a. Result from state testing that mosquitoes from our "pools" have tested positive for WNV
    b. Results from adult traps that indicate a high density of mosquitoes (>25 per trap)
    c. Consultation with the Department of Health/Office of Epidemiology
    d. Human cases.

4. Equine cases of WNV outside of city limits will be considered on a case by case basis.

5. The city will respond to complaints of high densities of mosquitoes by investigating the complaint and trying to determine the source. All decisions to adulticide will be made on a case by case basis. Fogging will be focused and limited to the area(s) that meet the above criteria.

6. If a decision is made to adulticide, the city will follow ALL the recommendations given in the Notification section of this report.

7. The city will make every attempt to have the EPA examine and monitor the application of adulticides in accordance with federal and state law.


The town will satisfy all the following criteria in implementing its mandatory notification plan:

1. Initiate and implement the initial phase of the Public Notification Plan: beginning in early June '04) use all available media, inform the public of the risks of WNV in this area, the health risks and benefits of the pesticide of choice, and the precautionary responsibilities of the residents.

2. Make available a City employee and phone number through which the public can request "no spray" for their property. From this process, begin to create a City map which designates the "no spray" zones far in advance of any decision to spray. Make available to the public a simple but bold and noticeable poster to be displayed on the "no spray" properties (to make it possible for the spraying operator to recognize these properties from a distance and to alert the rest of the public that such an option exists).

3. Inform the public at least 72-hours in advance of each spraying incident, via an English and Spanish-language full-scale media campaign including: news releases and paid legal and display advertising in print media for three consecutive days preceding the application. Public service announcements and paid advertising on radio and community access television, as well as public postings and advisories on the town's Info-Line and website. That information will contain:
    a. the city's intention to apply pesticides, defining agent to be sprayed with complete information on the chemical and its properties;
    b. explanation of method of application; outlining all areas to be sprayed and approximate time of fogging
    c. explanation of how to register individual preferences concerning spraying residential properties.
    d. providing name and number of public official to be contacted with citizen questions and concerns.
    e. reminder to the public about those individuals who are at greatest risk; stating what to do if exposed to the agents applied, or if having a suspected reaction to pesticide exposure;
    f. list of precautions to be taken by individuals. (See below)
        1. Remain indoors during spraying and for several hours after.
        2. Covering outdoor furniture and play equipment before application or washing them with soap and water after.
        3. Close windows and doors. Turning off air conditioners or swamp coolers (or setting them to recirculate indoor air only.
        4. Avoid eye contact with spray if you are outdoors during spraying, rinsing eyes with water or eye drops if there is contact.
        5.Wash skin surfaces if they come in contact with insecticide.
        6. Rinse thoroughly with water all fruits and vegetables from the garden, before cooking or eating them.
        7. Bring in laundry and toys before spraying or thoroughly washing them afterwards.
        8. Bring in pets, protecting horses and livestock and bee hives and covering ornamental fish ponds during application. Pyrethrins are toxic to bees and fish!!
        9. Consult your doctor if you think your health was affected by spraying.

4. Avail itself of other possible venues for reaching the public, including but not limited to postings in schools, fire departments, police departments, hospitals and clinics, public buildings and local businesses. (A list of those locations should be prepared in advance.)

5. Notify local hospitals, clinics and emergency response entities as well as local veterinarians of fogging schedule and range. (A list of those locations should be prepared in advance.)

6. Establish and advertise a permanent and easily accessed and carefully controlled list for citizens to permanently register their desire for spraying or not spraying and keeping that number _____________ dedicated for that purpose. Providing up-dated messages on the town's Info Line at 534-6363 and on the town's website at www.silvercity.net/vctf.

Charging one city employee with full responsibility for handling these vital tasks as well as interfacing with the public.

7. Perform a careful review (by a member of Vector Control Task Force, Mayor, City Manager and city employees charged with fogging and public information procedures) immediately following each pesticide application evaluating the success of procedures, problems encountered, and ways in which spraying, notification and interaction with the public can be improved. Results will be reported to the City Council.

8. Maintaining a data bank at City Hall, available for public reference during business hours, of: current brochures and public education materials, health bulletins and the following basic information on the two most commonly used pesticides, 1. permethrins and 2. pyrethrins and pyrethroids. (Source for the materials on pesticides: Colorado State University.)

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