Week 27 – June 30-July 6

2013 MOSQUITO REPORT: WEEK 27

Report based on data collected from traps deployed the week of June 30-July 6, 2013. Report prepared by Chan Suom, M.S., Dave Lawson, and Nate Boonisar.

1. CURRENT MOSQUITO ACTIVITY/TREND

CDC Light Traps:
CDC light traps from most towns continue to be inundated with higher than average numbers of mosquitoes. Only Quincy and Sharon had lower than average collections.

Gravid Traps:
Gravid mosquito collections continue to report lower than average numbers of mosquitoes. Avon, Canton, Holbrook, Millis, Norfolk and Westwood were the only towns to collect a higher than average number of mosquitoes.

2. CURRENT PREDOMINANT SPECIES

CDC Light Traps:
We are still seeing an incredibly high number of Aedes vexans, Psorophora ferox, and Coquillettidia perturbans. Ochlerotatus canadensis has increased dramatically in Canton (900+), Medfield, Millis, Walpole (~400) , Weymouth, and Wrentham. Our Canton collection continues an upward trend, reporting more than 10,000 mosquitoes in one trap night: 900+ Oc. canadensis, 3,500+ Ae. vexans and 5,600+ Ps. ferox! Dedham collected almost 1,400 Cq. perturbans and 1,100+ Ae. vexans! The Foxborough collection had a dramatic decrease; most specimens in the light trap were moths. Our new Medfield location is bringing in over 2,600+ Ps. ferox and 1,100+ Ae. vexans! Millis is reporting over 2,100+ Cq. perturbans.

Gravid Traps:
Culex pipiens/restuans are predominant in these traps, though their populations are depreessed throughout the county.

3. COMPARISON TO PREVIOUS SEASON

The overall mosquito population for this week is above average compared to the historical averages for each town. Along with the constant humidity, the past rainfalls and flooding events have really exacerbated this outbreak.

4. WEATHER SUMMARY

The only rain that fell this week occurred on Sunday into Monday when some showers moved across the area. Amounts were under ¼ inch district-wide. As the Bermuda high pressure system strengthened, hot and humid weather occurred for the remainder of the week. Temperatures were above normal with high humidity (with the exception of Tuesday evening as a backdoor front gave some relief to eastern areas).

Total weekly rainfall: 0.04 inches (-0.67 in.)
Total Monthly rainfall: 0.04 inches (-0.57 in.)
Total Yearly rainfall: 24.79 inches (+2.91 in.)

5. NUMBER OF REQUESTS FOR SERVICE

We are unable to provide exact figures for this week due to computer systems maintainence. The NCMCD had received 789 service requests last week, with 3,373 total service requests at that point.

6. MCP/COMMISSION RESPONSE

The Norfolk County Mosquito Control District is being inundated with phone calls from residents in neighborhoods adjacent to the Neponset and Charles River floodplains, following significant floods that peaked on June 7th. The district continues to respond to requests with ULV applications. Residents also continue to request ground larvicide applications in response to standing water that is everywhere after the second/third wettest June on record. We made an effort to include parts of Quincy, Weymouth, and other towns adjacent to the flood plains outbreak in a special ULV application since the July 4th holiday prevented us from conducting our usual Thursday route.

Contact

144 Production Rd, Suite C

Walpole, MA 02081

Office: (781) 762-3681
Fax: (781) 769-6436