UNIDEF   23986
UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICO PARA LA DEFENSA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Droplet size and effectiveness on Aedes aegypti o fan ULV adulticide-larvicide formulation using defferent solvents
Autor/es:
HARBURGUER LAURA; LUCIA, ALEJANDRO; SECCACINI, EMILIA; LICASTRO SUSANA; ZERBA, EDUARDO; MASUH HECTOR
Reunión:
Simposio; The 21º Latin American Symposium at the 77º AMCA Annual Meeting; 2011
Resumen:
Droplet
size and effectiveness on Aedes aegypti
of an ULV adulticide-larvicide formulation using different solvents
Laura Harburguer, Alejandro Lucía, Emilia Seccacini, Susana
Licastro, Eduardo Zerba and Héctor Masuh.
Centro de
Investigaciones de Plagas e Insecticidas (CIPEIN-CITEFA/CONICET).
Juan Bautista de
La Salle 4397. (B1603ALO) Villa Martelli. Buenos Aires. Argentina.
lharburguer@citefa.gov.ar
One of the most common
methods for controlling arthropod vectors, particularly mosquitoes, is the application
of insecticides by ground sprayers. When selecting spray equipment and
insecticides, factors such as the recommended dose, the droplet size, the
moving speed of the vehicle, the sprayer cost, etc., are very important.
Droplet size is one of the most significant factors that affect how well a
vector control application works, and depends, among other factors, of the
solvent used. The use of gasoil as solvent is often recommended, invoking
better insecticidal effect, more aerosol dispersion and high visual impact at
the time of application.
In this work we measure
the droplet size during application of an ULV formulation containing permethrin
as adulticide and pyriproxyfen as larvicide. This formulation was applied with
a thermal fogger using water, diesel or biodiesel as solvents, and as
water-based cold fogger. We evaluated the effectiveness of these formulations
on late 3rd or early 4th instars larvae and adults of Aedes aegypti in semi-field scale and in a field trial performed in
Puerto Libertad, Misiones, Argentina.
We found that the
average droplet size of aqueous formulations was higher than oil-based ones. All
formulations were equally effective on adults at all distances tested; however the
effect on larvae mortality, measured as emergence inhibition (%EI) was higher for
the aqueous formulation.