Long-term residual activity of methoprene against Psorophora columbiae larvae in rice plots.
A slow-release, briquet formulation of methoprene produced long-term residual activity against Psorophora columbiae larvae in 37.2 m2 (400 ft2) rice plots. An application rate of 1 briquet/9.3 m2 (1/100 ft2) provided significantly (P less than 0.05) greater reduction of adult mosquito emergence (98.2%) than did a rate of 1 briquet/18.6 m2 (1/200 ft2) (89.6%) during 5 insecticidal activity assessments conducted over a period of 58 days. No significant (P greater than 0.05) differences in activity were detected between treated plots which were continuously flooded and those periodically drained and reflooded.
Weathersbee
A A
AA
Department of Entomology, University of Arkansas, Fayetteville 72701.
Meisch
M V
MV
D000383:Agriculture; D000818:Animals; D009033:Culicidae; D003692:Delayed-Action Preparations; D007814:Larva; D008726:Methoprene; D009032:Mosquito Control / Q000379:methods*; D012275:Oryza
D003692:Delayed-Action Preparations; D008726:Methoprene