Field efficacy and nontarget effects of the mosquito Larvicides temephos, methoprene, and Bacillus thuringiensis var. israelensis in Florida mangroveswamps
Sp. Lawler et al., Field efficacy and nontarget effects of the mosquito Larvicides temephos, methoprene, and Bacillus thuringiensis var. israelensis in Florida mangroveswamps, J AM MOSQ C, 15(4), 1999, pp. 446-452
Citations number
20
Categorie Soggetti
Entomology/Pest Control
Journal title
JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION
We compared the efficacy and nontarget effects of temephos, Bacillus thurin
giensis var. israelensis (B.t.i.), and methoprene applied by helicopter to
control mosquito larvae in mangrove swamps on Sanibel Island, FL, in May 19
97. Three sites per treatment and 3 untreated sites were used. Temephos (Ab
ate(TM)) was applied at 37 ml/ha (43% active ingredient [AI]), B.t.i. granu
les (Vectobac G(TM)) were applied at 5.606 kg/ha (200 International Toxic U
nits/mg), and methoprene (Altosid(TM) ALL) was applied at 213 ml/ha (5% AI)
. Efficacy was quantified by monitoring the survival of caged and uncaged l
arval Aedes taeniorhynchus. We quantified mortality of sentinel nontarget a
mphipods (Talitridae) at all sites, monitored the effect of temephos on fly
ing arthropods using light traps, and collected dead insects in tarps suspe
nded under mangroves in areas treated with either temephos or methoprene. E
ach pesticide showed good overall efficacy but occasional failures occurred
. No detectable mortality of amphipods or Eying insects attributable to pes
ticides was found. The inconsistent field efficacies of the pesticides indi
cate a need for reinspection of treated sites in this habitat.