Acute toxicity of mosquitocidal compounds to young mosquitofish, Gambusia affinis.
Toxicity of Florida mosquito larvicides and adulticides to 3-5 day old Gambusia affinis was determined in the laboratory. After 24-h exposure, the larvicides, temephos, fenoxycarb and petroleum distillates had LC50 values of 5.60, 1.05 and 593.4 ppm, respectively. After 24 h the adulticides resmethrin, fenthion, naled and malathion had LC50 values of 0.007, 2.94, 3.50 and 12.68 ppm, respectively. The only compound toxic to young mosquitofish at maximum field application rates was resmethrin. However, in the light of earlier tests, aerially applied adulticides generally reach the water surface at reduced concentrations and thus probably pose little or no risk to mosquitofish populations.
Tietze
N S
NS
Florida Department of Health and Rehabilitative Services, John A. Mulrennan Sr. Research Laboratory, Panama City 32406-0277.
Hester
P G
PG
Hallmon
C F
CF
Olson
M A
MA
Shaffer
K R
KR
D000818:Animals; D002219:Carbamates / Q000633:toxicity; D009033:Culicidae; D003532:Cyprinodontiformes; D004305:Dose-Response Relationship, Drug; D005284:Fenthion / Q000633:toxicity; D007306:Insecticides / Q000633:toxicity*; D008294:Malathion / Q000633:toxicity; D009267:Naled / Q000633:toxicity; D048448:Phenylcarbamates; D011722:Pyrethrins / Q000633:toxicity; D000002:Temefos / Q000633:toxicity
D002219:Carbamates; D007306:Insecticides; D048448:Phenylcarbamates; D011722:Pyrethrins; D005284:Fenthion; C052034:fenoxycarb; D000002:Temefos; D009267:Naled; D008294:Malathion; C100036:resmethrin