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During present study it was recorded that 6-methoxy ageratochromene isolated from whole herb acetone extract of Ageratum conyzoides  inhibits the growth and moulting in the second and fourth instar larval treatment of Culex quinquefasciatus. When the plant extract were applied topically, the average pupal period prolonged significantly (p < 0.05) as compared to those of the control. Fourth stage larvae just prior to metamorphosis were most sensitive. Mortality in  larvae, pupae and during ecdysis brings about a considerable fall in population. This growth index was found to be reduced in Ageratum conyzoides  (P < 0.01) compared to the control.



Growth disrupting ecdysis morphogenetic aberration precocene

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Mishra, P., Saxena, R. C., Saxena, H. K., & Arora, S. (2000). Growth Inhibitory Activity of 6-Methoxyageratochromene on Culex-Quinquefasciatus (Diptera : Culicidae). Environment Conservation Journal, 1(2&amp;3), 93–94.


  1. Bowers, W. S. 1976. Discovery of insect anti allatotropins. In: LT Gilbert (Ed) The Juvenile Hormones. Plenum Press NY p394 DOI:
  2. Finney, D. J. 1971. Probit Analysis - A Book. Revised Edi Cambridge University Press London 318.
  3. Jacobson, M. 1982. Plants, insect and man - Their interrelationship. Economic Botany. 36: 346-354. DOI:
  4. King, W. V. 1954. Chemicals Evaluated as Insecticides and Repellents at Orlando. Florida Agricultural Handbook No 69. USDA Washington D. C.
  5. Saxena, R. C., Dixit O. P. and Sukumaran, Padma 1992. Laboratory assessment of indigenous plant extracts for anti Juvenile activity in Culex quinque fasciatus. Ind. J. Med. Res. (A) 95-204-206.
  6. Saxena, R. C., Harshan, V., Saxena, A., Sukumaran, P., Sharma, M. C., and Lakshmana Kumar, M. 1993. Larvicidal and chemosterilant activity ofAnnona aquamosa alkaloids against Anopheles stephensi. Journal ofthe American Mosquito Control Association. 9: 84-87.
  7. Saxena, A. and Saxena, R. C. 192. Effects of Ageratum conyzoides extract on the developmental stages of vector, Anopheles stephensi (Diptera: Culicidae). J. Environ. Biol. 13 (3): 207- 209.
  8. Sukurnar, K., Perich, M. J. and Boobar, L. R. 1991. Botanical derivatives in mosquito control --A review.. Journal ofMosquito Control Association. 7: 210-237.
  9. Tunon, H., Thorsell, W. and Bohlin, L. 1994. Mosquito repelling activity of compounds occurring inAchi//ea mil/efa/ium L. (Asteraceae). Economic Botany. 48 (2) 111- 120. DOI:
  10. Zarraug, I. M. A., Nugud, A. D., Bashir, A. K. and Mageed, A. A. 1990. Balanites aegyptica as a mosquito larvicide. Int. J. Crude Drug Res. 28 (4): 267-271. DOI: