title: Efficacy and longevity of Bacillus sphaericus 2362 formulations for control of mosquito larvae in dairy wastewater lagoons.
abstract: Bacillus sphaericus strain 2362 was evaluated for the control of Culex larvae in dairy wastewater lagoons. Both initial and long-term efficacy were studied. Two primary powder preparations of ABG-6184 yielded mediocre and short-term control at the rates of 0.25 and 0.5 lb/acre (0.26 and 0.56 kg/ha), while level of control and persistence greatly increased as the dosages were increased to 1.0, 2.0 and 4.0 lb/acre (1.12, 2.24 and 4.48 kg/ha). The 1.0 and 2.0 lb/acre rates yielded almost 100% control for 4 weeks and the 4.0 lb/acre rate yielded control (99%) for 49 days or longer. A flowable concentrate preparation (BSP-2) yielded complete initial and persistent control of larvae for 14-21 days at 2.0, 4.0 and 5.0 lb/acre (2.24, 4.49 and 5.6 kg/ha). Granular formulations of B. sphaericus 2362 (ABG-6185) were also evaluated at 2.5, 5.0, 7.5, 10.0 and 20.0 lb/acre (2.8, 5.6, 8.4, 11.2 and 22.4 kg/ha) of the granules. Some of the formulations were more active than the others, yielding excellent initial and persistent control (80% +) for 14-21 days with one treatment.
authors.affiliation: Department of Entomology, University of California, Riverside 92521.
authors.forename: M S
authors.initials: MS
authors.lastname: Mulla
authors.forename: H
authors.initials: H
authors.lastname: Axelrod
authors.forename: H A
authors.initials: HA
authors.lastname: Darwazeh
authors.forename: B A
authors.initials: BA
authors.lastname: Matanmi
mesh_terms: D000818:Animals; D001407:Bacillus / Q000502:physiology*; D009033:Culicidae / Q000382:microbiology*; D003612:Dairying / Q000379:methods*; D005260:Female; D007814:Larva; D010058:Oviposition; D010063:Ovum; D010572:Pest Control, Biological; D012722:Sewage; D014865:Waste Disposal, Fluid
chemical_list: D012722:Sewage