A comparison of FourStar™ Briquets and natular™ XRT tablets in a North Shore suburb of Chicago, Il.
Stormwater catch basins are the primary source of mosquitoes targeted by the North Shore Mosquito Abatement District, in the northern suburbs of Chicago. Over a 17-wk period (June to September 2011), 3 clusters of catch basins located within a 0.7-km2 area were monitored weekly with dipper samples of immature mosquitoes. During the 2nd week of monitoring, Natular XRT tablets (6.25% spinosad) were applied to northernmost cluster and FourStar Briquets (6% Bacillus û, 1% Bacillus thuringiensis israelensis) were applied to the southernmost cluster; the remaining middle cluster was kept untreated. Following 15 wk of monitoring in 20 basins in each cluster, both Natular and FourStar reduced immature numbers in treated catch basins for 8 consecutive weeks. These results suggest, if effectively timed, a single application of either larvicide may last an entire season.
Justin E
JE
Harbison
Marlon
M
Henry
Christopher
C
Xamplas
Robert
R
Berry
Dhrubajyoti
D
Bhattacharya
Lara R
LR
Dugas
D000818:Animals; D001407:Bacillus; D002641:Chicago; D009033:Culicidae / Q000254:growth & development; D004338:Drug Combinations; D007306:Insecticides; D007814:Larva / Q000254:growth & development; D018942:Macrolides; D009032:Mosquito Control / Q000379:methods*; D013997:Time Factors
D004338:Drug Combinations; D007306:Insecticides; D018942:Macrolides; C415329:spinosad