Efficacy of three synthetic pyrethroids against three mosquito species in Arkansas and Louisiana.
Adult mortality of Anopheles quadrimaculatus, Culex quinquefasciatus, and Aedes sollicitans was observed following ultra-low-volume (ULV) exposure to Responde, Permanone 31-66 RTU, and Scourge. Permanone 31-66 RTU (1:2.13, permethrin:PBO) and Scourge (1:3, resmethrin:PBO) were applied at 0.00175 lb AI/acre, while Responde (1:3, prallethrin:PBO) was applied at 0.001 lb AI/acre, and all were evaluated at 100, 200, and 300 ft. downwind of application. Significant mortality differences (P < or = 0.05) were observed among all compounds at 15 min and at 1, 12, and 24 h posttreatment against An. quadrimaculatus and Cx. quinquefasciatus. Responde exhibited significantly greater (P < or = 0.05) control (knockdown) against An. quadrimaculatus at both 15 min and 1 h posttreatment than did Permanone 31-66 RTU or Scourge; however, some recovery occurred by 12 h posttreatment. At 15 min posttreatment, Responde and Scourge were significantly (P < or = 0.05) more effective against Cx. quinquefasciatus than Permanone 31-66 RTU except at 300 ft. downwind, where Scourge was significantly (P < or = 0.05) more effective than either compound. No significant mortality differences (P < or = 0.05) were observed among the 3 compounds at 15 min, 1 h, 12 h, and 24 h posttreatment when tested against Ae. sollicitans. No significant mortality differences (P < or = 0.05) were observed between the 1:3 and 1:5 (prallethrin: piperonyl butoxide) formulations of Responde at any time posttreatment when tested against Ae. sollicitans.
Groves
R L
RL
Department of Entomology, University of Arkansas, Fayetteville 72701, USA.
Dame
D A
DA
Meek
C L
CL
Meisch
M V
MV
D000330:Aedes; D000818:Animals; D000852:Anopheles; D001131:Arkansas; D002626:Chemistry, Pharmaceutical; D003465:Culex; D009033:Culicidae; D007306:Insecticides / Q000737:chemistry*; D008145:Louisiana; D009032:Mosquito Control / Q000379:methods*; D011722:Pyrethrins / Q000737:chemistry; D013045:Species Specificity; D015996:Survival Rate
D007306:Insecticides; D011722:Pyrethrins; C100036:resmethrin