Indoor low-volume insecticide spray for the control of Anopheles albimanus in southern Mexico. Village-scale trials of bendiocarb, deltamethrin and cyfluthrin.
A comparative insecticide village-scale trial was carried out to determine the efficacy of low-volume (LV) indoor spray of bendiocarb, deltamethrin and cyfluthrin for the control of Anopheles albimanus in a coastal plain of southern Mexico. Low-volume spray was conducted with knapsack mist-blowers, giving an average discharge rate of 215 ml/min, which deposited droplets of 50-100 microns. Using this technique, 25 houses were treated/sprayman/day as compared with 8 houses/sprayman/day using conventional hand compression pumps. Indicators of LV mortality showed a residual activity of 10 wk as compared with 13 wk of activity for wettable powder (WP) (bendiocarb). When comparing expenditures, LV spray costs were 43% less when using bendiocarb, 83% less with deltamethrin and 74% less with cyfluthrin with respect to the conventional WP spray of the same insecticides. Low-volume spray time was reduced by one-third, with respect to WP. Malaria incidence was reduced by 53 and 56%, respectively, in the bendiocarb LV and deltamethrin LV treated villages as compared with the untreated village.
Arredondo-Jiménez
J I
JI
Centro de Investigación de Paludismo, Dirección General de Epidemiología, Secretaría de Salud, Tapachula, Chiapas, México.
Rodríguez
M H
MH
Bown
D N
DN
Loyola
E G
EG
D000818:Animals; D000852:Anopheles; D002219:Carbamates; D003362:Cost-Benefit Analysis; D003365:Costs and Cost Analysis; D006801:Humans; D015994:Incidence; D007299:Insect Bites and Stings / Q000453:epidemiology; D007306:Insecticides / Q000191:economics; D008288:Malaria / Q000453:epidemiology; D008800:Mexico; D009032:Mosquito Control / Q000191:economics / Q000379:methods*; D009570:Nitriles; D048448:Phenylcarbamates; D011722:Pyrethrins
D002219:Carbamates; D007306:Insecticides; D009570:Nitriles; D048448:Phenylcarbamates; D011722:Pyrethrins; C017180:decamethrin; C007725:bendiocarb; C052570:cyfluthrin