Cost Effective ~ Safe ~ Mosquito Solutions
The Mosquito Science Trap-N-Kill®
is based on Lethal Ovitrap Technology which has been extensively tested
against
Aedes aegypti.
Laboratory testing:
Mortality of adult females of 98% or greater was achieved in caged
experiments. When young larvae were added to the Lethal OviTrap (LOT),
100% larval mortality occurred. In cups that had
been flooded with the equivalent of 6.2 cm of rain, or the water
allowed to evaporate from the cups to within 1 inch of the bottom, 59%
or greater mortality of adult females occurred. When young
larvae were added to the cup, 100% larval mortality occurred. Treated
lethal strips that had been used for one month in a Brazilian field
trial still provided 89% adult female control in caged laboratory
experiments and when young larvae were added to the cup, 99.5% larval
mortality occurred within 6 hours[2].
Field Trials:
Several field trials have been conducted with blocks of housing in
different areas being used as treated and control sites. In
Brazil, field trials were conducted at two different sites[3].
Control sites were only surveyed for insects, while treated sites
received 5 LOT’s inside and 5 LOT’s outside each house. Weekly surveys
for larvae, pupae, and adults were conducted by sampling a different
subset of 10 houses each week. After 60 days, the treated
blocks had only 0.27 (Area 1) and 0.72 (Area 2) pupae per household
versus untreated blocks with 10.04 and 8.3 pupae per household,
respectively[3].
Although an epidemiological study was not conducted, these results show
the mosquitoes were suppressed below the 0.5 to 1.5 pupae per person
threshold levels for dengue transmission, as determined by a model
developed by Focks, et. al.,[4].
The highest number of pupae per house in the Brazilian field trials was
0.72. Even assuming only 2 occupants per house, a density of
0.36 pupa per person is still below the lowest threshold estimate for
dengue transmission.
The LOT was found to be very effective in two Peruvian sites (Perich,
Zeichner, unpublished data) where the number of pupae per household was
0 in the treated blocks compared to 1.0 and 1.4 in the two untreated
blocks. The number of positive LOT’s decreased by 88% and 96%
in the two treated blocks and the adult population was decreased 92%
and 98% respectively. A study done in Thailand in 2000 also
found “significant suppression was achieved” based on number of
containers with larvae, containers with pupae and number of adult Ae.
aegypti[5].
Although less control was achieved than in the Brazil trials, it is
believed that an abundance of alternative sites provided significant
competition for the 10 LOT’s. Control would have been
enhanced if more ovitraps had been used per house. A study
done in Bangladesh found that the LOT had a sustained impact on dengue
vector population densities and concluded that it “would be a useful
control method, particularly where sanitation programs have been
implemented with some degree of success[6].”
SpringStar Inc. - PO Box 2622 -
Woodinville, WA 98072
(425)-487-6011 or toll-free in
the US or Canada (800) 769-1043
