Effect of Triflumuron and Pyriproxyfen on Musca domestica L Larval Stages in the Laboratory

Background:  The residual effect of triflumuron and pyriproxyfen on Musca domestica L larval stages was studied in the laboratory. Methods : Both IGRs at varying concentrations ranging between 0.5 to 2.5 mg/L were placed inside beakers with mice chow and vitamin B complex and water as food for the 1 st , 2 nd and 3 rd instars M.domestica larvae. Results: Both IGRs inhibit M. domestica adult emergence of 98-98.5% when applied at the lowest concentration of 0.5 mg/L on the 1 st instar, 93-97% of adult emergence inhibition on the 2 nd instar,and 91-97% of adult emergence inhibi­tion on the 3 rd instar larvae respectively. There was no significant difference between triflumuron and pyriproxy­fen on house­fly adult emergence inhibition when fed to the 1 st , 2 nd and 3 rd instars M.domestica larvae ( P> 0.05). However, there was a significant difference between the IGRs and the control ( P< 0.05). Conclusion : Both triflumuron and pyriproxyfen are effective in inhibiting adult emergence of housefly M  domes­tica and therefore should be recommended for fly control particularly in chicken farms and dumping grounds in Malaysia for housefly control activities.