title: Laboratory evaluation of Bacillus thuringiensis H-14 against Aedes aegypti.
abstract: Laboratory efficacy and residual activity of a water dispersible granule formulation of Bacillus thuringiensis israelensis (Bti) at the dosages of 3000, 6000 and 15000 ITU/L were conducted in this study. The study was conducted in two different size containers, earthen jar (45 L) and glass jar (3 L) with or without daily replenishment of 6 L and 0.3 L of water in the earthen and glass jars, respectively. Results indicate that for both earthen jar and glass jar evaluations, Bti at the tested dosages, performed effectively against Aedes aegypti, giving a minimum of 42 days effective killing activity. When the dosage was increased from 3000 ITU/L to 6000 ITU/L or 15000 ITU/L, the effective periods of the Bti increased by an additional one to three weeks. The Bti water dispersible granule provided better larvicidal activity with replenishment of water compared with non-replenishment of water especially for the higher dosage (15000 ITU/L).
authors.affiliation: Vector Control Research Unit, School of Biological Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia.
authors.forename: Y W
authors.initials: YW
authors.lastname: Lee
authors.forename: J
authors.initials: J
authors.lastname: Zairi
mesh_terms: D000330:Aedes / Q000187:drug effects*; D000818:Animals; D001413:Bacillus thuringiensis; D007303:Insect Vectors / Q000187:drug effects; D007306:Insecticides / Q000494:pharmacology*; D010572:Pest Control, Biological; D014867:Water
chemical_list: D007306:Insecticides; D014867:Water