Effects of insect growth regulators with juvenile hormone activity againstCallosobruchus maculatus (F.) (Coleoptera: Bruchidae)

  • G. E. S. Abo El-Ghar


Five insect growth regulators, CGA-29170, CGA-45128, MV-678, RO-20458, and fenoxycarb, that exhibit juvenile hormone activity were evaluated for biological and residual activity against the southern cowpea weevil,Callosobruchus maculatus (F.). The compounds were mixed with cowpea seeds at concentrations of 10, 25, 50, and 100 mg/kg, and the residual activity was evaluated at 2-week to 9-months posttreatment intervals. Most JHA-treatments showed high initial activity at the 2-week interval resulting in a significantly lower oviposition rate and showing a short residual life in this respect. CGA-45128, however, at all concentrations tested did not significantly affect oviposition at 2-week to 4-month posttreatment intervals, where was more active and caused high depression in oviposition at 6-month interval. The juvenoids had an inductive effect on the percent egg hatch at various intervals, especially CGA-29170 and CGA-45128 treatments extinding over a period of 9 months. At the lower concentration of 10mg/kg, CGA-45128 was highly effective as F1-progeny suppressant ofC. maculatus at 2-week posttreatment interval extending over 9 months. MV-678, CGA-29170, and fenoxycarb applied at 50, 50, and 25 mg/kg, respectively, showed similar activity, however, the residual activity of the latter decreased after 4 months. RO-20458, however, showed high initial activity at these concentrations. Adult emergence in all treatments was significantly suppressed, where did not exceed 29.5% at the lower concentrations of 10 and/or 25 mg/kg at 9-month posttreatment interval.


Insect Growth Regulator Cowpea Seed Fenoxycarb Posttreatment Interval High Initial Activity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Fünf mit Juvenilhormon-Aktivität versehene Insektenwachstums-Regulatoren (JHA): CGA-29170, CGA-45128, MV-678, RO-20458 sowie Fenoxycarb, wurden auf ihre biologische und residuale Aktivität gegenüber dem SamenkäferCallosobruchus maculatus untersucht. Die Substanzen wurden mit Erbsensamen in Konzentrationen von 10, 25, 50 und 100 mg/kg gemischt, und die residuale Aktivität in 2-Wochen- bis 9-Monats-Intervallen ermittelt. Die meisten JHA-Behandlungen zeigten eine hohe Anfangs-Aktivität, die sich in signifikant niedrigerer Eiablage und kürzerer Lebensdauer ausdrückte. CGA-45128 jedoch ließ innerhalb von 2 Wochen bis 4 Monaten bei allen Konzentrationen keinen signifikanten Einfluß auf die Eiablage erkennen, wohl aber nach 6 Monaten. Die Juvenoide hatten eine induktive Wirkung auf die Eischlüpfquote, vor allem CGA-29170 und CGA-45128 9 Monate nach Behandlung. Bei niedrigerer Konzentration von 10 mg/kg war CGA-45128 hochwirksam als Depressor der F1-Nachkommen vonC. maculatus nach 2 Wochen bis 9 Monaten. MV-678, CGA-29170 und Fenoxycarb, mit 50, 50 und 25 mg/kg angewandt, zeigten änliche Aktivitäten, doch verringerte sich die residuale Aktivität des letztgenannten Wirkstoffs schon nach 4 Monaten wesentlich. RO-20458 zeigte bei diesen Konzentrationen hohe Anfangs-Aktivität. Das Adultenschlüpfen wurde nach allen Behandlungen signifikant verringert und erreichte bei 10 und/oder 25 mg/kg nach 9 Monaten maximal 29,5% des Normalen.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Antognini, J. 1972: Insect growth regualtors and sex attractants in pest control. Invitational paper presented at 56th Ann. meeting of the Pacific Branch Ent. Soc. Am. Victoria, B.C., June 20.Google Scholar
  2. Bhatnagar-Thomas, P.L., 1973: Control of insect pests of stored grains using a juvenile analogue. J. Econ. Ent.66, 277–278.Google Scholar
  3. Cogburn, R.R., 1988: Fenoxycarb as a long-term protectant for stored rough rice. J. Econ. Ent.81, 722–726.Google Scholar
  4. Duncan, D.B., 1955: Multiple range and multiple F-test. Biometrics11, 1–42.Google Scholar
  5. El-Tantawi, M.A.;Gouhar, K.A.;Mansour, M.M.;Guirguis, M.W., 1976: Blocking of embryonic development in southern cowpea weevil,Callosobruchus maculatus (F.) (Coleoptera: Bruchidae), by some juvenile hormone analogues. Z. Ang. Ent.81, 37–42.Google Scholar
  6. Kramer, K.J.;Beeman, R.W.;Hendricks, L.H., 1981: Activity of RO 13-5223 and RO 13-774 against stored-product insects. J. Econ. Ent.74, 678–680.Google Scholar
  7. Kramer, K.J.;Hendricks, L.H.;Wojciak, J.H.;Flyer, J., 1985: Evaluation of fenoxycarb,Bacillus thuringiensis, and malathion as grain protectants in small bins. J. Econ. Ent.78, 632–636.Google Scholar
  8. Loschiavo, S.R., 1975: Tests of 4 synthetic insect growth regulators with juvenile hormone activity against 7 species of stored products insects. Manit. Ent.9, 43–52.Google Scholar
  9. Loschiavo, S. R., 1976: Effects of the synthetic insect growth regulators methoprene and hydroprene on survival, development or reproduction of six species of stored-product insects. J. Econ. Ent.69, 395–399.Google Scholar
  10. McGregor, H.E.;Kramer, K.J., 1975: Activity of insect growth regulators, hydrprene and methoprene, on wheat and corn against several stored-grain insects. J. Econ. Ent.68, 668–670.Google Scholar
  11. Metwally, M.M.;Sehnal, F.;Landa, V., 1972: Reduction of fecundity and control of the khapra beetle by juvenile hormone mimics. J. Econ. Ent.65, 1603–1605.Google Scholar
  12. Mian, L.S.;Mulla, M.S., 1982a: Biological activity of IGRs against four stored-product coleopterans. J. Econ. Ent.75, 80–85.Google Scholar
  13. Mian, L.S.;Mulla, M.S., 1982b: Residual activity of insect growth regulators against stored-product beetles in grain commodities. J. Econ. Ent.75, 599–603.Google Scholar
  14. Mian, L.S.;Mulla, M.S., 1983: Persistance of three IGRs in stored wheat. J. Econ. Ent.76, 622–625.Google Scholar
  15. Pallos, F.M.;Menn, J.J.;Letchworth, P.E.;Miaullis, J.B., 1971: Synthetic mimics of insect juvenile hormone. Nature (Lond.)232, 486–487.Google Scholar
  16. Rowlands, D.G., 1976: The uptake and metabolism by stored wheat grains of an insect juvenile hormone and two insect hormone mimics. J. Stored Prod. Res.12, 35–42.Google Scholar
  17. Rup, P.J.;Chopra, P.K., 1984: Effect of hydroprene onCallosobruchus maculatus (F.) (Coleoptera: Bruchidae). J. Stored Prod. Res.20, 229–232.Google Scholar
  18. Strong, R.G.;Dickman, J., 1973: Comparative effectiveness of fifteen insect growth regulators against several pests of stored products. J. Econ. Ent.66, 1167–1173.Google Scholar
  19. Thomas, P.J.; Bhatnagar-Thomas, P.L., 1968: Use of a juvenile hormone analogue as insecticide of pests of stored grain. Nature (Lond.) 219–249.Google Scholar
  20. Williams, P.;Amos, T.G., 1974: Some effects of synthetic juvenile insect hormone and hormone analogues onTribolium castaneum (Herbst). Aust. J. Zool.22, 147–153.Google Scholar

Copyright information

© Verlag Paul Parey 1992

Authors and Affiliations

  • G. E. S. Abo El-Ghar
    • 1
  1. 1.Department of Plant Protection, Faculty of AgricultureMinufiya UniversityShibin El-KomEgypt

Personalised recommendations