Field trials with Vectolex (Bacillus sphaericus) and Vectobac (Bacillus thuringiensis (H-14)) against Anopheles gambiae and Culex quinquefasciatus breeding in Zaire.
Under field conditions in Kinshasa, Zaire, an aqueous suspension of Bacillus thuringiensis (H-14), Vectobac (12-AS), lost most of its larvicidal activity at all concentrations after 48 h against Culex quinquefasciatus breeding in polluted gutter water and Anopheles gambiae breeding in clear water irrigation ponds. However, good control of Cx. quinquefasciatus was obtained using a granular formulation of B. sphaericus, Vectolex-G (ABG-6185), at concentrations of 10-30 kg/ha. High concentrations of Vectolex-G gave excellent control of An. gambiae breeding in irrigation ponds. The Vectobac-G was less active against An. gambiae than Vectolex-G, in spite of good dispersion of Vectobac-G particles.
Karch
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Department of Medical Entomology, Mission Française de Coopération I.N.R.B.--B.P. 7861, Kinshasa, Zaire.
Manzambi
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ZA
Salaun
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JJ
D000818:Animals; D000852:Anopheles; D001407:Bacillus; D001413:Bacillus thuringiensis; D003465:Culex; D015023:Democratic Republic of the Congo; D010572:Pest Control, Biological