A new ovitrap made of slow release natural materials containing pyriproxyfen for Aedes aegypti (Diptera: culicidae) control

LAURA JUAN; EMILIA SECCACINI; EDUARDO ZERBA; SUSANA LICASTRO

JOURNAL OF MEDICAL ENTOMOLOGY

ENTOMOLOGICAL SOC AMER

Lugar: Lanham; Año: 2013 vol. 50 p. 916 - 919

0022-2585

ABSTRACT This initial study is aimed to measure the performance of incorporating pyriproxyfen in natural materials with low environmental impact to obtain slow release formulations that can be used as larvicidal or autocidal ovitraps avoiding hatched Aedes aegypti (L.) eggs to emerge as adults. Hollow candlesmadeof beeswax or parafÞn:stearin 1:1 mixture containing pyriproxyfen 0.01 and 0.05% were prepared and used as holding water containers for larval bioassay. Pyriproxyfen was released quickly into the larvae-breeding water. Ae. aegypti larvae were introduced immediately after the addition of tap water to the hollow candles (t
1 min) or after 1, 4, and 8 h. More than 40% of the larvae did not emerge as adults for t
1 min, reaching 80Ð100% when the larvae were added after 1 or 4 h, respectively. The hollow candles were kept at room temperature, and water was replaced every 15 d. Bioassays performed every 30 d showed that the residual activity obtained for both matrices and both concentrations of pyriproxyfen was higher than 360 d, with 100% inhibition of adult emergence.