Soil presence reduces the control effectiveness of a slow release formulation of pyriproxyfen on Ae. aegypti larvae

JUNGES, M.T.; HARBURGUER L; MC LORENZO; P EISENBERG; H MASUH; AE CARBAJO

TROPICAL MEDICINE AND INTERNATIONAL HEALTH

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2019 vol. 25 p. 216 - 221

1360-2276

Objective.Studied the influence of soil over the effectiveness of two devicesof a new slow release formulation of pyriproxyfen coextrudedwith low density polyethylene:a floating slow release device and a non-floating slow releasedevice.Methods.Two slow release devices were development using lowdensity polyethylene, pyriproxyfen as larvicide, and calciumcarbonate as filler. A factorial design was used to evaluate theeffect of soil presence over the performance of each device. Weeklybioassays were performed. Results.Soil presence affected treatment effectiveness, but this effect wasassociated to device type. Treatment effectivetime of the tablets was close to 3 months.Conclusion.Treatment effectiveness could be reduced because of the loss ofpyriproxyfen by several physico-chemical processes such as adsorptioninto the soil.p { margin-bottom: 0.21cm; direction: ltr; color: rgb(0, 0, 0); line-height: 115%; text-align: left; }p.western { font-family: "Calibri", serif; font-size: 11pt; }p.cjk { font-family: "Calibri"; font-size: 11pt; }p.ctl { font-family: "Times New Roman"; font-size: 11pt; }a:link { color: rgb(0, 0, 255); }