Effectiveness of Bacillus Thuringiensis Serovar. Israelensis (Vectobac 12 AS) and Bacillus Sphaericus 2362 (ABG-6232) Against Culex Spp. Mosquitoes in a Dairy Lagoon in Central Florida

Authors

  • Arshad Ali
  • Michael S. Weaver
  • Eric Cotsenmoyer

Abstract

A wettable powder (WP) formulation of Bacillus sphaericus 2362 (ABG-6232) and an aqueous suspension of Bacillus thuringiensis serovar. israelensis (Vectobac 12 AS) were evaluated against Culex mosquitoes in a dairy wastewater lagoon in central Florida. Culex nigripalpus and Cx. quinquefasciatus inhabited the lagoon; the former species comprised >90% of the total Culex larvae collected during the sampling periods. Vectobac 12 AS (at 1.17 L/ha) and ABG-6232 (at 1.12 kg/ha) were each applied separately to the lagoon on three different occasions during 1987-1988. Vectobac 12 AS caused a maximum 71-88% larval reduction for only one day posttreatment in the three treatments. ABG-6232 (WP) gave an average larval reduction of 84-92% in the three tests for up to 13 days posttreatment with >50% average reduction of the larvae being maintained for beyond 17 days posttreatment.

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Published

1989-12-01

Issue

Vol. 72, No. 4 (December 1989)

Section

Literature Review Articles

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