ASSESSMENT OF A DIRECT APPLICATION OF TWO BACILLUS THURINGIENSIS ISRAELENSIS FORMULATIONS FOR IMMEDIATE AND RESIDUAL CONTROL OF AEDES ALBOPICTUS

作者：Farajollahi Ary^*; Williams Gregory M; Condon George C; Kesavaraju Banugopan; Unlu Isik; Gaugler Randy

来源：Journal of the American Mosquito Control Association, 2013, 29(4): 385-388.

DOI：10.2987/13-6332.1

• Bacillus thuringiensis israelensis
• larvicide
• Asian tiger mosquito
• VectoBac WDG
• megadose

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 (R) 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.

• 出版日期2013-12