NFMAD Surveillance Trap Data 2020

Trapping numbers for 2020 season

Mosquito Trapping Overview 2020

Attempts at trapping in June 2020 were a dismal failure due to:

1) Cold nighttime temperatures

Trapping is not successful if temperatures are below 60-62 degrees.

2)  Extreme weather

There were high winds, rainstorms, hail one night, and despite some hot days, very cold nights, including a hard freeze June 8th.

July trapping has been efficient, occasionally delayed by high winds and rain.

2019 Trap Tables Archive are located in the Annual Report/ Compliance Certification

2017 Trap Tables Archive

2018 Trap Tables Archive are located in the Annual Report/ Compliance Certification

NFMAD Surveillance Program

NFMAD conducts adult mosquito surveillance with CDC light traps, set throughout our District. There are up to 18 sentinel traps set approximately one night per week in perimeters around the towns of Hotchkiss and Paonia/Bowie, and in the regions between the towns. Other trap sites are added when an increased level of information is needed around event/recreational/park areas, and/or an uptick in adult mosquito numbers is observed in a sentinel trap site. The additional traps aid the pinpointing of the breeding site(s), and help to direct the direction of the search, in quarter-mile increments. NFMAD also has temporary trap sites that are set in response to a resident complaint or request.

The CDC light traps collect adult mosquitoes for at least 12 hours and attract mosquitoes by emitting carbon dioxide and using artificial light, essentially the same attractants as for human beings! This is one of the reasons that events with large groups of people tend to be adult mosquito magnets since the levels of carbon dioxide increase markedly from human exhalation, and added lights in parks or yards become huge mosquito traps.

NFMAD uses the trap data in several ways, including directing the crew in the continuing search for breeding sites, monitoring larval and pupal treatments that have been applied, RAMP testing for the presence of mosquitoes carrying West Nile virus, as well as before and after application of adulticide to monitor effects. Events in the North Fork district are trapped in a tighter perimeter beginning at least 3 weeks in advance, with aggressive treatment using larval, pupal, and barrier products. If indicated, adulticide will be sprayed before an event occurs.

The adult mosquitoes that are captured in our light traps are frozen and identified to species. Species numbers are tallied and monitored for peaks and dips in the mosquito population. A trap that suddenly has a high number of mosquitoes indicates there is potentially a water source nearby that is breeding mosquitoes, and the crew increases the search for the breeding site in a larger circumference. Since each species of mosquito has breeding site preferences, each type of terrain is monitored. Occasionally, adult mosquitoes are blown into the District by wind, particularly along the western boundary of Hotchkiss, and from the Crawford reservoir.

Culex species mosquitoes are tested for West Nile virus using the Rapid Analyte Measurement Reader, commonly known as RAMP. NFMAD purchased the RAMP equipment in the winter of 2013, with funds generously donated by the towns of Hotchkiss and Paonia, a private grant from Planet Heritage Foundation, as well as private donations from residents and an anonymous donor.

The RAMP reader allows the District to test trapped pools of mosquitoes for West Nile within hours of collection, rather than the previous testing using Polymerase Chain Reaction (PCR) in Denver, which required 8-15 days to turnaround the information and is highly expensive. The RAMP purchase became even more important as federal funding for PCR testing was decreased to the states in March of 2013, and further in 2014, essentially decreasing the Delta County Public Health department’s budget for testing trap pools for NFMAD and Delta District #1. The Public Health office will confirm RAMP test results with PCR testing if requested over the season, if the timing is within the state testing boundaries, and the budget allows.

Given that Culex mosquitoes potentially carrying W. Nile virus can go from egg to flying adult in less than 4 days, the RAMP reader has given NFMAD the ability to direct and redirect treatment in an efficient manner. In the 2014 season, as a direct result of the leasing of an office space for the lab, NFMAD turnaround on a trapped pool of mosquitoes had decreased to 4-6 hours.  By 2018, the turnaround was less than 4 hours.  This commitment to rapid response continues in 2019.

Any increase in mosquito species in a weekly trap causes a rapid response by the crew…searching for breeding sites, applying barrier and larval treatments, and using targeted spraying to kill adults.   Given the difficulty with areas of Delta County that do not have mosquito control exporting mosquitoes into the District, more adulticide spraying happens at the District boundaries as a result of trapping.  Adulticide notifications are posted on the NFMAD Facebook page, (www.facebook.com/NorthForkMosquitoAbatementDistrict), and on the Adulticide page of this website

June 2019

Trapping is beginning in the NF District areas this week, depending on weather.  High winds and rain, coupled with low nightly temperatures has delayed the onset of trapping until the second week of June.

 

HOTCHKISS AREA TRAPS

Trap #1 Zack's BBQ areaAedesCulexOther Total RAMPNOTES
June 23, 20
Rained out
7/1/20
HIgh Winds prevented trapping
7/7/20357228135Negative 34.2
7/14/20
Skewed results due to high winds
5016N/A
7/28/2010028135N/A
8/4/203155692<10
8/11/2014251049<10
8/18/20235533<10
8/25/20710724Global test: 640
Retest: <10
Possible contamination, but re-trap pool tested negative.
Trap # 2: Fairgrounds PrimaryAedesCulexOther SpeciesTotal RAMPNOTES
June23, June 30
High winds, rain, low nightly temps
7/7/20320124Negative 34.2
7/14/20
High winds, rained out
7/21/2080615N/A
7/28/20634370Negative <10
8/4/20196025Negative 10.6
8/11/201001N/A
8/18/20130316N/A
8/25/204116N/A
Trap #3 Lorah Lane areaAedesCulexOther SpeciesTotal RAMPNOTES
June23, June 30
High winds, rain, low nightly temps
7/7/20558366Negative 11.4
7/14/20
High Winds, rained out
7/21/20314219Negative <10
7/28/202430862Negative <10
8/4/201722221Negative<10
8/11/20312419Negative<10
8/18/201217332Negative<10
8/25/2057315Negative <10
Trap #4 Shifflet/Willow Hts area
Non-Sentinel, as needed
AedesCulexOtherTotal RAMPNOTES
June23, June 30
High winds, rain, low nightly temps
7/7/20014014Negative
11.4
7/14/20
High Winds, rained out
7/21/20
Trap Failure
7/28/20525636Negative <10
8/4/2028313Negative <10
8/11/20
Zero: Trap Failure?
8/18/200909Negative<10
8/25/2029011Negative <10
Trap #5 West Hotchkiss (BK)
Outside of District Border along the Western side
AedesCulexOther SpeciesTotal RAMPNOTES
June23, June 30
High winds, rain, low nightly temps
7/7/20111517Negative <10
7/14/20
High Winds, rained out
7/21/20106218Negative <10
7/28/2014193871Negative<10
8/4/2015201146Negative<10
8/11/20011119Negative <10
8/18/200369Negative<10
8/25/205112541Negative<10
Trap # 6 **Non-Sentinel
Old Water Treatment Plant area
AedesCulexOther SpeciesTotalRAMPNOTES
**Occasional by Request or for upcoming EventsAedesCulexOtherTotalRAMPNOTES
PAONIA AREA TRAPS
Trap # 7: Bell Creek Rd. areaAedesCulexOther SpeciesTotalRAMPNOTES
June23, June 30
High winds, rain, low nightly temps
7/7/201132438Negative <10
7/14/20
High winds, rained out
7/21/20
Weather-related trap failure
7/28/206391890Negative <10
8/4/20106521Damaged sample: blood in pool, tested at 640
8/5/20
Re-trapped to retest for WNV
961634130Negative <10
8/11/2013111034Negative<10
8/18/20116522Negative<10
8/25/2083819Negative <10
Trap #8 Pond Z area
Southern Border outside of North Fork Boundary
AedesCulexOther SpeciesTotal RAMPNOTES
June23, June 30
High winds, rain, low nightly temps
7/7/20290597Negative
<10
7/14/20
High Winds, rained out
7/21/20256058Negative <10
7/28/206391821Negative <10
8/4/20106521Damaged sample (Global test with Bell Creek Rd.)
Blood in sample
8/5/20
Re-trapped to test for WNV in single test
961628130Negative <10
8/11/2006511Negative<10
8/18/2009817Negative<10
8/25/20110112Negative <10
Trap # 9 Skyhill Pond area
Non-sentinel, as needed
AedesCulexOther SpeciesTotalRAMPNOTES
Trap #10 German Creek, GZ areas
Non-sentinel
AedesCulexOther SpeciesTotalRAMPNOTES
June:
High winds, rain, low nightly temps
7/1/200011N/A
7/8/200415Negative <10
7/15/2004610Negative <10
7/29/20
Trap Failure
8/5/20010414tainted sample...blood presence
8/12/2007310Negative<10
8/19/2019414Negative<10
9/2/201001N/A
Trap # 11 Hadley Rd area
Non-sentinel, as needed
AedesCulexOther SpeciesTotal RAMPNOTES
June:
High winds, rain, low nightly temps
Trap #12 R-25 Rd.
Non-sentinel
AedesCulexOther SpeciesTotalRAMPNOTES
June + July 1
High winds, rain, low nightly temps
7/8/202002N/A
7/15/202013N/A
7/22/20
High winds
7/29/20130114N/A
8/5/200437Negative<10
8/12/200123Negative<10
8/19/200505Negative<10
Trap # 13 Campbell Rd. AedesCulexOther Species TotalRAMPNOTES
June:
High winds, rain, low nightly temps
7/1/20041014Negative <10
7/8/2008816Negative <10
7/15/20171624Negative <10
7/22/20
High winds
7/29/209183865Negative <10
8/5/200182240Negative <10
8/12/20221169192Negative<10
8/19/2006410Negative<10
9/2/20731727Negative<10
Trap # 14 Pumpkin Hollow Rd. AedesCulexOther SpeciesTotalRAMPNOTES
June:
High winds, rain, low nightly temps
7/1/20102214Negative <10
7/8/203115Negative <10

7/15/201158037232Negative <10
7/22/20
High Winds
7/29/201522612190Negative <10
8/5/202116542Negative <10
8/12/203119353Negative<10
8/19/2017332272Negative<10
9/2/20134421Negative <10
Trap # 15
Paonia Water Tx, East Pumpkin Hollow areas
Aedes CulexOther SpeciesTotalRAMPNOTES
June:
High winds, rain, low nightly temps
7/1/20110213Negative
<10
7/8/200569Negative <10
7/15/206141226Negative <10
7/22/20
High Winds
7/29/200358Negative <10
8/5/207201037Negative <10
8/12/2017917Negative<10
8/19/203182243Negative<10
9/2/20751224Negative <10
Trap #16 Volunteer Park AedesCulexOther SpeciesTotalRAMPNOTES
June:
High winds, rain, low nightly temps
7/1/20123147144Negative <10
7/8/201424528215Negative <10
7/15/201424528215Negative <10
7/22/20
High Winds
7/29/201001N/A
8/5/202281122261Negative <10
8/12/203661840424Negative<10
8/19/2035469171594Negative<10
9/2/2012614131Negative <10
Trap # 17 Lund Rd areaAedesCulexOther SpeciesTotalRAMPNOTES
June:
High winds, rain, low nightly temps
7/8/2044210Negative <10
7/15/202728988Negative <10
7/22/20
High Winds
7/29/2095942146Negative <10
8/5/2039213090Negative <10
8/12/205271243Negative<10
8/19/205112339Negative<10
9/2/2030122163Negative <10
Trap #18, #19, #20: By Request or Need onlyAedesCulexOther SpeciesTotalRAMPNOTES
June
July
August
September
**Non-Sentinel by request or event AedesCulexOther SpeciesTotalRAMPNOTES