INVESTIGADORES
MASUH Hector Mario
congresos y reuniones científicas
Título:
Efficacy of a smoke generating tablet containing permethrin and pyriproxyfen against Aedes aegypti (Diptera: Culicidae)
Autor/es:
LAURA HARBURGUER; EMILIA SECCACINI; HÉCTOR MASUH; EDUARDO ZERBA; SUSANA LICASTRO
Lugar:
New Orleans, USA
Reunión:
Congreso; 75th annual meeting American Mosquito Control Association and 19th latin American Symposium; 2009
Institución organizadora:
American Mosquito Control Association
Resumen:
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A new smoke-generating
tablet containing pyriproxyfen (2%) and permethrin (10%) was evaluated at
laboratory and field level. Recovery of the insecticides from the fumes gave over
90% for pyriproxyfen and around 50% for permethrin. The biological efficacy of pyriproxyfen
released in the smoke was evaluated on larvae III/IV with different doses and
exposure times. 100% adult emergence inhibition (EI%) were obtained at 30
minutes, and a dose-dependent effect was observed at 5 minutes. The efficacy of
the permethrin released was evaluated as knock down effect (KT50) on adults. There was no significant difference in KT50
values obtained for permethrin and permethrin plus pyriproxyfen (KT50
= 19.87 and 19.36 min repectively).
A field trial
was performed in Misiones -Argentina.
2/4 tablets were lighted per house. ULV application of permethrin 15% from a
handheld sprayer was performed in another area of the city as a positive
control. A third area was used as control area. Sentinel cages containing adults and jars with water and larvae
III/IV were used to determine effectivity of treatments. Adult emergence
inhibition (%EI) and adult mortality at 24h was determined. Adult collection
within houses with a manual aspirator before and after treatments was performed.
The results show more than 90% EI and almost 100% adult mortality in the area
treated with the tablet, and six wk of significant control (P < 0.01) based on adult Ae.
aegypti house collections.
