Cache Mosquito Abatement District (CMAD)
Season Summary
We had no human or horse WNV (West Nile Virus) cases confirmed in the District for the 2009 season. Only a few mosquito pools tested positive for WNV, indicating that while the virus was present it was not at epidemic levels. The District emphasized larvaciding, increasing the hours spent in the field. Larvaciding targets the larvae and is more efficient than fogging by killing large numbers of mosquitoes before they mature and can fly to other breeding sites. Fogging is done to control the adult mosquitoes and is subject to weather and wind conditions.
We increased the hours spent larvaciding while the hours spent fogging were down from 2008. The stormy weather this summer prevented some of the fogging from taking place. We relied more on the mosquito counts from the traps set around the District as well as calls from citizens reporting high numbers of adult mosquitoes to determine where fogging ocurred. Adult mosquito numbers were down from last season, possibly reflecting our continued emphasis on larvaciding.
For a detailed summary of the District's 2009 season, please click here.
| 2005 | 2006 | 2007 | 2008 | 2009 | |
|---|---|---|---|---|---|
| Labor | |||||
| Larvaciding | * | 1775 | 1867 | 2107 | 2190 |
| Fogging | * | 570 | 810 | 658 | 582 |
| Total hours | 1502 | 2345 | 2677 | 2765 | 2775 |
| Chemicals | |||||
| Bti (lbs) | 2112 | 3890 | 167 | 21 | 2207 |
| Abate (lbs) | 1210 | 3921 | 7908 | 7927 | 9325 |
| BVA2 | 847 | 538 | 756 | ||
| GB-1111 | 131 | 279 | |||
| Altosid | 175 | 1033 | 2602 | 1578 | 1084 |
| Malathion (gal) | 969 | 1203 | 1709 | 1542 | 1372 |