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  • D. J. Madder (a1) and W. L. Lockhart (a2)

A series of sod-lined pools were constructed and used to monitor repeated applications of diflubenzuron as Dimilin WP-25 and mefhoprene as Altosid SR-10. Diflubenzuron and methoprene "disappeared" rapidly from the pool water as determined by bioassays using Aedes aegypti (L.) (Culicidae) larvae and by gas-liquid chromatography (GLC). Chemical assays for a diflubenzuron derivative were positive for several days; bioassay indicated the presence of diflubenzuron (or at least growth regulator activity) at levels toxic to mosquito larvae for up to 16 days. In contrast methoprene "fell" below GLC detection within 2 days although biological activity persisted for approximately a week after treatment. Neither parent compound should cause a long-term persistence hazard when used for mosquito control in Canadian prairie waters.

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Abbott, W. S. 1925. A method of computing the effectiveness of an insecticide. J. econ. Ent. 18: 265267.
Anonymous. 1974. Technical Information – TH6040 insect growth regulator. Thompson-Hayward, Kansas City. 26 pp.
Madder, D. J. 1978. The disappearance from, efficacy in and effect on non-target organisms of diflubenzuron, methoprene and chlorpyrifos in a lentic ecosystem. M.Sc. Thesis, University of Manitoba. 139 pp.
Metcalf, R., Lu, P., and Bowlus, S.. 1975. Degradation and environmental fate of 1-(2-6-difluorobenzoyl)-3-(4-chlorophenyl) urea. J. Agric. Food Chem. 23: 359364.
Schaefer, C. H. and Dupras, E. F. Jr. 1973. Insect developmental inhibitors. 4. Persistence of ZR-515. J. econ. Ent. 66: 923925.
Schaefer, C. H. and Dupras, E. F. Jr. 1976. Factors affecting the stability of Dimilin in water and the persistence of Dimilin in field waters. J. Agric. Food Chem. 24: 733739.
Schaefer, C. H., Dupras, E. F., and Wilder, W. H.. 1973. Pond tests with ZR-515. Biological and chemical residues. Proc. 41st A. Conf. Calif. Mosquito Control Ass. 41: 137138.
Schooley, D. A., Bergot, B. J., Dunham, L. L., and Siddall, J. B.. 1975. Environmental degradation of the insect growth regulator methoprene (isopropyl (2E, 4E)-11-methoxy-3,7,11-trimethyl-2,4-dodecadienoate). II. Metabolism of aquatic microorganisms. J. Agric. Food Chem. 23: 293298.
Solomon, J. 1979. A sample clean-up and concentration apparatus for the determination of chlorinated hydrocarbon residues in environmental samples. Analyt. Chem. 51: 18611863.
Staal, G. B. 1975. Insect growth regulators with juvenile hormone activity. A. Rev. Ent. 20: 417460.
Worobey, B. L. and Webster, G. R. B.. 1977 a. Gas-liquid chromatographic determination of diflubenzuron (Dimilin) in water as its trifluoroacetyl derivative. J. Ass. off. anal. Chem. 60: 213217.
Worobey, B. L. and Webster, G. R. B.. 1977 b. Correction to Worobey and Webster (1977). J. Ass. off. anal. Chem. 60: 986.
Worobey, B. L. and Webster, G. R. B.. 1978. In vitro degradation of diflubenzuron (Dimilin) during derivatization with perfluoroan-hydrides. J. Chromat. 153: 423432.
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The Canadian Entomologist
  • ISSN: 0008-347X
  • EISSN: 1918-3240
  • URL: /core/journals/canadian-entomologist
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