Ultralow volume application of Bacillus thuringiensis ssp. israelensis for the control of mosquitoes

Evaluation of the effectiveness of Bacillus thuringiensis ssp. israelensis (B.t.i.) against mosquito larvae dispersed by ultralow volume (ULV) spraying was conducted in simulated field trials. Effectiveness was measured using 3 different indicators: larval mortality, colony-forming unit enumeration,...

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Bibliographic Details
Published inJournal of the American Mosquito Control Association Vol. 12; no. 4; p. 651
Main Authors Lee, H.L. (Institute for Medical Research, Kuala Lumpur, Malaysia.), Gregorio, E.R. Jr, Khadri, M.S, Seleena, P
Format Journal Article
LanguageEnglish
Published United States 01.12.1996
Subjects
AEDES AEGYPTI
ANOPHELES
ANOPHELES MACULATUS
APPLICATION RATES
AUXILIAIRE DE LUTTE BIOLOGIQUE
BACILLUS THURINGIENSIS
BACILLUS THURINGIENSIS SUBSP. ISRAELENSI
BIOLOGICAL CONTROL
BIOLOGICAL CONTROL ORGANISMS
CONTROL BIOLOGICO
CONTROL DE INSECTOS
CULEX QUINQUEFASCIATUS
DOSE D'APPLICATION
DOSIS DE APLICACION
DROPLET STUDIES
EFECTOS RESIDUALES
EFFET RESIDUEL
EFFICACY
INSECT CONTROL
Insecticides
LARVAE
LARVAS
LARVE
LUTTE ANTIINSECTE
LUTTE BIOLOGIQUE
MALAISIE
MALASIA
MALAYSIA
MORTALIDAD
MORTALITE
MORTALITY
Mosquito Control - methods
ORGANISMOS PARA CONTROL BIOLOGICO
Pest Control, Biological
PULVERISATION A ULTRA BAS VOLUME
PULVERIZACION DOSIS ULTRAREDUCIDA
RESIDUAL EFFECTS
ULTRALOW VOLUME SPRAYING
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Summary:Evaluation of the effectiveness of Bacillus thuringiensis ssp. israelensis (B.t.i.) against mosquito larvae dispersed by ultralow volume (ULV) spraying was conducted in simulated field trials. Effectiveness was measured using 3 different indicators: larval mortality, colony-forming unit enumeration, and droplet analysis. B.t.i. was dispersed with a ULV generator using 2 different flow rates: 0.3 and 0.5 liter/min on 2 different days. Based on the results of this study, it can be concluded that an output of 0.3 liter/min is effective for controlling Aedes aegypti. although a dosage of 0.5 liter/min can be used when high residual activity is desired. For Culex quinquefasciatus control, both dosages were effective but with low residual activity. For Anopheles maculatus control, only a discharge rate of 0.5 liter/min was effective with low residual activity. B.t.i. application at both dosages penetrated tires well, indicating that B.t.i. ULV application is an effective method for controlling container-inhabiting mosquitoes. Good coverage of target area and penetration were attributed to satisfactory droplet profiles.
Bibliography:9728786
L72
ISSN:8756-971X
1943-6270