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Article Title: Efficacy of Diflubenzuron on Field Collected Larvae of Mosquitoes from Port Harcourt


The comparative effectiveness of Diflubenzuron was determined against Culex quinquefasciatus and Anopheles gambiae S. L collected from the field. Various concentrations (0.2, 0.4, 0.6, 0.8, 1.0 mg/l) of the larvicide were tested in the laboratory against third instar larvae of the species, to determine the adult emergence inhibition (IE) for Diflubenzuron at 50% and 90%. All values were evaluated using probit analysis. The adult emergence in the control was above 95%. Diflubenzuron (IGR) controlled the growth of Anopheles gambiae S.L than Culex quinquefasciatus. Adult emergence inhibition after 48hrs was 100% for both Culex and Anopheles species. Adult emergence inhibition for Anopheles and Culex species decreased to 80% and less than 60% respectively after eight (8) days. The results support the use of diflubenzuron in the control of mosquito vectors of many disease agents that plague humans.