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Abstract
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.
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References
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References
Bowers, W. S. 1976. Discovery of insect anti allatotropins. In: LT Gilbert (Ed) The Juvenile Hormones. Plenum Press NY p394 DOI: https://doi.org/10.1007/978-1-4684-7947-8_27
Finney, D. J. 1971. Probit Analysis - A Book. Revised Edi Cambridge University Press London 318.
Jacobson, M. 1982. Plants, insect and man - Their interrelationship. Economic Botany. 36: 346-354. DOI: https://doi.org/10.1007/BF02858560
King, W. V. 1954. Chemicals Evaluated as Insecticides and Repellents at Orlando. Florida Agricultural Handbook No 69. USDA Washington D. C.
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.
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.
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.
Sukurnar, K., Perich, M. J. and Boobar, L. R. 1991. Botanical derivatives in mosquito control --A review.. Journal ofMosquito Control Association. 7: 210-237.
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: https://doi.org/10.1007/BF02908196
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: https://doi.org/10.3109/13880209009082831