Susceptibility of first instar Toxorhynchites splendens to malathion, naled and resmethrin.
Acute toxicity tests were conducted to measure the response of first instar Toxorhynchites splendens to commonly used mosquito adulticides: malathion, naled and resmethrin. The concentrations of pesticide causing 50% mortality (LC50) after 24 h was 2.87, 69.1 and 623 ppb for resmethrin, malathion and naled, respectively. Naled was determined to be the least toxic of the 3 compounds tested for integrated use with Tx. splendens. The latter assessments were based on comparisons between laboratory-derived dose-response curves and maximum concentrations reached in standing water calculated using standard application rates.
Tietze
N S
NS
Florida Agricultural and Mechanical University, John A. Mulrennan Sr. Research Laboratory, Panama City, FL 32405.
Schreiber
E T
ET
Hester
P G
PG
Hallmon
C F
CF
Olson
M A
MA
Shaffer
K R
KR
D000818:Animals; D009033:Culicidae; D007814:Larva; D008294:Malathion; D009032:Mosquito Control / Q000379:methods*; D009267:Naled; D011722:Pyrethrins
D011722:Pyrethrins; D009267:Naled; D008294:Malathion; C100036:resmethrin