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A comparison of the juvenilizing effect of six juvenile hormone-like activity compounds on Egyptian Culex pipiens L.

Published online by Cambridge University Press:  27 March 2009

N. L. Kelada ,
I. A. Gaaboub  and
I. A. Rawash
N. L. Kelada
Affiliation:
Entomology Division, Plant Protection Department, Faculty of Agriculture, University of Alexandria, Alexandria, Egypt
I. A. Gaaboub
Affiliation:
Entomology Division, Plant Protection Department, Faculty of Agriculture, University of Alexandria, Alexandria, Egypt
I. A. Rawash
Affiliation:
Entomology Division, Plant Protection Department, Faculty of Agriculture, University of Alexandria, Alexandria, Egypt
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Summary

Tests were made to determine the juvenilizing effects of TH6040, JH-25, Altosid, Altozar, ZR-777 and ZR-619 on Culex pipiens L. using the IC50 value (dose to inhibit the emergence of 50% of adults) as a criterion. The descending order of activity was Altosid, TH6040, Altozar, ZR-777, JH-25 and ZR·619. Insignificant prolongations were recorded in the larval or pupal durations except in the case of TH6040 (Dimilin). The time lapse from larval treatment (early fourth instar) to adult emergence was prolonged by about 18·7% following treatment with 0·0001–0·1 μg/ml.

Juvenilizing effects of the tested compounds applied to the early fourth instar extended to the adult stage of Culex pipiens L. and affected the duration of the first gonotrophic cycle. The concentrations of TH6040, JH-25, Altosid, Altozar, ZR-777 and ZR-619 tested caused prolongation of the time between emergence and first oviposition by about 20–50% (at 0·0001–0·1 μg/ml), 3–26% (at 0·001–5μg/ml), 0–15% (at 0·1 × 10-8–0·001 μg/ml), 3-–23% (at 0·1 × 10-8–0·001 μg/ml), 9–27% (at 0·1 × 10-7–0·01 μg/ml), and 11–32% (at 0·1 × 10-7–0·01 μg/ml), respectively.

The results obtained indicated that the sex ratio of C. pipiensL. changed progressively in all treatments but with an inconsistent trend according to the concentration of each compound. This conclusion provides further evidence on the effect of juvenile hormone-like activity compounds on adults emerging from treated larvae. The numbers of females produced were increased by about 15–30%, 9–27%, 1–35%, 1–38%, 6–44% and 31–71% after treatment with 0·0001–0·1 μg TH6040, 0·001–5μg JH-25, 0·1x 10-8–0·001 μg Altosid, 0·1 x 10-8–0·001 μg Altozar, 0·1 x lO-7–O·Ol μg ZR-777 and 0·01 × 10-7–0·01 μg ZR-619‘sol;ml, respectively.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 95 , Issue 1 , August 1980 , pp. 203 - 212
Copyright
Copyright © Cambridge University Press 1980

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References

Astafan, N. H. (1974). Studies on stored product pests. M.Sc. thesis, Faculty of Agriculture, University of Alexandria, Egypt.Google Scholar
Busvine, J. R. (1971). A Critical Review for Testing Insecticides. London: Commonwealth Institute of Entomology.Google Scholar
Christophers, S. R. (1911). The development of the egg follicle in Anophelines. Paludism 11, 73–88.Google Scholar
Gaaboub, I. A. & Dawood, M. R. (1974). Effects of sublethal concentrations of DDT and malathion on the fecundity and reproduction of Culex pipiens. Zeitschrift fur angewandte Entomologie 75, 435–443.CrossRefGoogle Scholar
Georghiou, G. R. & Lin, C. S. (1974). Time-sequence response Culex tarsalis following exposure to insect growth regulators. World Health Organization/Vector Biology and Control/Insect Oenetic and Resistance 74, 27.Google Scholar
Jakob, W. L. (1972). Additional studies with juvenile hormone type compounds against mosquito larvae. Mosquito News 32, 595–599.Google Scholar
Jakob, W. L. (1973). Developmental inhibition of mosquitoes and the house fly by urea analogues. Journal of Medical Entomology 10, 452–455.CrossRefGoogle ScholarPubMed
Jakob, W. L. & Schoof, H. F. (1971). Studies with juvenile hormone type compounds against mosquito larvae. Mosquito News 31, 540–543.Google Scholar
Jakob, W. L. & Schoof, H. F. (1972). Mosquito larvicide studied with MON-585, a juvenile hormonemimic. Mosquito News 32, 6–10.Google Scholar
Lewallen, L. L. (1964). Effects of farnesol and Ziram on mosquito larvae. Mosquito News 24, 43–45.Google Scholar
Litchfield, J. T. & Wilcoxon, F. (1949). A simplified method of evaluating dose-effect experiments. Journal of Pharmacology and Experimental Therapeutics 96, 99–113.Google ScholarPubMed
Macan, T. T. (1950). The anopheline mosquitoes of Iraq and North Persia. Museum of London School of Hygiene and Tropical Medicine 7, 109–217.Google Scholar
Miura, T. & Takahashi, R. M. (1973). Insect development inhibitors: effects on non-target aquatic organisms. Journal of Economic Entomology 66, 917–922.CrossRefGoogle Scholar
Miura, T. & Takahashi, R. M. (1974). Insect development inhibitors: effects of candidate mosquito control agents on non-target aquatic organisms. Environmental Entomology 3, 631–636.CrossRefGoogle Scholar
Mulla, M. Sc., Darwasch, H. A. & Nerland, R. E. (1974). Insect growth regulators: evaluation procedures and activity against mosquitoes. Journal of Economic Entomology 67, 329–332.CrossRefGoogle ScholarPubMed
Post, L. C. & Vincent, W. R. (1973). A new insecticide inhibits chitin synthesis. Naturewissenschaften 60, 431–433.CrossRefGoogle ScholarPubMed
Schaefer, C. H. & Wilder, W. H. (1972). Insect development inhibitors: a practical evaluation as mosquito control agents. Journal of Economic Entomology 65, 1066–1071.CrossRefGoogle ScholarPubMed
Spielman, A. & Skaff, V. (1967). Inhibition of metamorphosis and of ecdysis in mosquitoes. Journal of Insect Physiology 13, 1087–1095.CrossRefGoogle ScholarPubMed
Spielman, A. & Williams, C. M. (1966). Lethal effects of synthetic juvenile hormone on larvae of the yellow fever mosquito Aedes aegypti. Science, Washington 154, 1043–1044.CrossRefGoogle ScholarPubMed
Steelman, C. D. & Schilling, P. E. (1972). Effects of a juvenile hormone mimic on Psorophora confinnis (Lynch Arribalzaga) and non-target aquatic insects. Mosquito News 32, 350–354.Google Scholar