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.
Department of Entomology, University of Arkansas, Fayetteville 72701.
A A
AA
Weathersbee
M V
MV
Meisch
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