Influence of Suspended Particulates on the Activity of Bacillus thuringiensis Serotype H-14 Against Mosquito Larvae12
- 1 February 1982
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 75 (1) , 1-4
- https://doi.org/10.1093/jee/75.1.1
Abstract
The efficacy of spore-crystal formulations of Bacillus thuringiensis Berliner serotype H-14 (var. israelensis de Barjac) decreased against mosquito larvae when in aqueous environments containing a concentration of soil or clay particles ≥ 0.5 mg/ml. Fresh whole-culture B. thuringiensis var. israelensis was similarly affected by the soil and clay particles. Sand grains did not have a strong effect on efficacy except when finely ground into particles of 147 μ or less. Settling out of the particulates before the addition of B. thuringiensis var. israelensis did reduce their suppressive effect on the bacterium.Keywords
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