Fipronil as a larvicide against the container-inhabiting mosquito, Aedes albopictus.
In the laboratory, fipronil was tested against laboratory-reared and field-collected early 4th-instars of Aedes albopictus. The insecticide was also bioassayed for activity against natural field populations of Ae. albopictus inhabiting 1-liter-capacity stone-made containers in a cemetery in St. Augustine, FL. The cemetery containers also were utilized to study initial efficacy and activity persistence of fipronil against natural populations of Ae. albopictus. The laboratory-reared larvae were 2-fold more susceptible than field-collected larvae as indicated by the 50% lethal concentration (LC50) values of 2.6 and 6 parts per billion (ppb) for laboratory-reared and field-collected larvae, respectively. In the field bioassay, in stone-made containers, the LC50 value of Ae. albopictus larvae amounted to 57.5 ppb. In the cemetery containers, fipronil applied at 3.2 and 32 ppb gave 100% control of Ae. albopictus larvae with either rate of application for at least up to 8 wk posttreatment.
Xue
Rui-De
RD
Anastasia Mosquito Control District, 500 Old Beach Road, St. Augustine, FL 32080, USA.
Pridgeon
Julia W
JW
Becnel
James J
JJ
Ali
Arshad
A
D000330:Aedes / Q000254:growth & development*; D000818:Animals; D007306:Insecticides; D007814:Larva / Q000254:growth & development; D009032:Mosquito Control / Q000379:methods*; D011720:Pyrazoles; D013997:Time Factors
D007306:Insecticides; D011720:Pyrazoles; C082360:fipronil