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1 December 2013 Assessment of a Direct Application of Two Bacillus thuringiensis israelensis Formulations for Immediate and Residual Control of Aedes albopictus
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Abstract

The bacterial agent Bacillus thuringiensis israelensis (Bti) is a highly effective larvicide against various medically important mosquito and black fly vector species. Recent formulations of this powerful larvicidal tool have been evaluated for their field efficacy in integrated mosquito management programs. Laboratory and controlled-condition trials have indicated long periods of residual efficacy, whereas field persistence is often much lower in duration. We investigated the residual persistence of high doses of 2 formulations of Bti, a water-dispersible granule (VectoBac® WDG; 16 mg/liter) and an extruded pellet (VBC-60066; 80 mg/liter), for the management of natural larval populations of Aedes albopictus. Laboratory tests demonstrated 100% (WDG) and ≥99.7% (VBC) average mortality across all treatments over 180 days. Field tests exhibited 100% efficacy (WDG and VBC) for 3 wk against Ae. albopictus and other coinhabiting mosquito species, with some residual efficacy lasting for >4 wk. These results are discussed in relation to current field control of domestic Aedes vectors of public health significance.

2013 by The American Mosquito Control Association, Inc.
Ary Farajollahi, Gregory M Williams, George C Condon, Banugopan Kesavaraju, Isik Unlu, and Randy Gaugler "Assessment of a Direct Application of Two Bacillus thuringiensis israelensis Formulations for Immediate and Residual Control of Aedes albopictus," Journal of the American Mosquito Control Association 29(4), 385-388, (1 December 2013). https://doi.org/10.2987/13-6332.1
Published: 1 December 2013
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