Residual efficacy of field-applied permethrin, d-phenothrin, and resmethrin on plant foliage against adult mosquitoes.
Backpack sprayer applications of permethrin, d-phenothrin, and resmethrin to vegetation and plants at Anastasia Island, St. Augustine, FL, were evaluated for duration of residual efficacy against adult mosquitoes. All treatments produced 100% mortality (24 h) of mosquitoes in test cages placed within the vegetation. At 48 h and 1 wk posttreatment, insecticide treatments resulted in 70-100% reduction of adult mosquitoes caught by Centers for Disease Control and Prevention traps baited with 1-octen-3-ol. Insecticide residues in excised leaves from both treated and control areas of the study sites were evaluated against adult female Culex quinquefasciatus by laboratory bioassay. Permethrin produced 90% mortality up to 1 wk postapplication. Both d-phenothrin and resmethrin produced nearly this level of mortality for a much shorter duration of <48 h postapplication, with residual effects dropping significantly thereafter. Average insecticide concentrations in leaves were quantified by gas chromatography/mass spectroscopy, and some correlation was observed between chemical and biological results.
Amoo
A O J
AO
Anastasia Mosquito Control District, 500 Old Beach Road, St. Augustine, FL 32085, USA.
Xue
Rui-De
RD
Qualls
W A
WA
Quinn
B P
BP
Bernier
U R
UR
D000818:Animals; D003465:Culex; D005431:Florida; D008401:Gas Chromatography-Mass Spectrometry; D007306:Insecticides; D009032:Mosquito Control / Q000379:methods*; D000442:Octanols; D026023:Permethrin; D010573:Pesticide Residues / Q000032:analysis; D018515:Plant Leaves; D011722:Pyrethrins
D007306:Insecticides; D000442:Octanols; D010573:Pesticide Residues; D011722:Pyrethrins; D026023:Permethrin; C006166:phenothrin; C100036:resmethrin