Abstract
The bioactivity of different formulations of neem seed extracts against the whiteflyBemisia tabaci (Genn.) was assayed in semifield trials during 1992. Tomato plants variety UC-97 were cultivated in pots and left to natural infestation with whitefly in an open field and sprayed with various concentrations of each extract. The high concentrations of all the extracts tested exhibited obvious activity. Also, the different treatments reduced the population density of the adult whiteflies compared with the control. The percentage reduction in the population reached its maximum level one hour after treatment with any tested extract.
Similar content being viewed by others
References
Abbott, W. S., 1925: A method of computing the effectiveness of insecticides. J. Econ. Ent.18 (2), 265–267.
Dimetre, N. Z.;Schmidt, G. H., 1992: Efficacy of Neem Azal-S and Margosan-O against the bean aphid,Aphis fabae Scop. Anz. Schädlingsk. Pflanzenschutz, Umweltschutz,65, 75–79.
Henderson, C. F.;Tilton, E. W., 1955: Tests with acaricides against the brown wheat mite. J. Econ. Ent.48, (2), 157–161.
Knodel, J. J.;Larew, H. G.;Webb, R. E., 1986: Margosan-O, a commercial formulation of neem seed extract, controlsLiriomyza trifolii on chrysanthemum. J. Agr. Entom.3, (3), 249–254.
Rovesti, L.;Deseo, K. V., 1991: Effectiveness of neem seed kernel extract againstLeucoptera malifoliella Costa, (Lep., Lyonetiidae). J. Appl. Ent.111, 231–236.
Schmutterer, H., 1988: Potential of azadirachtin containing pesticides for integrated pest control in developing and industrialized countries. J. Insect Physiol.34, (7), 713–719.
Author information
Authors and Affiliations
Additional information
With one table
Rights and permissions
About this article
Cite this article
Dimetry, N.Z., Gomaa, A.A., Salem, A.A. et al. Bioactivity of some formulations of neem seed extracts against the whiteflyBemisia tabaci (Genn.). Anz. Schadlingskde., Pflanzenschutz, Umweltschutz 69, 140–141 (1996). https://doi.org/10.1007/BF01904716
Issue Date:
DOI: https://doi.org/10.1007/BF01904716