COMPARATIVE SUSCEPTIBILITY OF WHITEFLY STRAINS TO CERTAIN INSECTICIDES | ||
| Journal of Plant Protection and Pathology | ||
| Article 5, Volume 31, Issue 1, January 2006, Pages 449-455 PDF (2.07 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2006.235156 | ||
| Author | ||
| Hanan S. Taha | ||
| Central Agricultural Pesticides Laboratory, Dokki, Giza, Egypt. | ||
| Abstract | ||
| The rate of population growth is one reason that the sweet potato whitefly has become such a noxious pest. The effectiveness of an insecticide depends on the methods, the rate and the frequency of application. It is apparent that the degree of effectiveness of insecticides in the field correlate with the resistance status of Bemisia tabaci. Resistance to Organophosphorous , carbamates and pyrethroids is well established and involves a suit of mechanisms. In recent years, the need for a greater diversity of different groups or classes of insecticides for whitefly control having different mode of action become a must. Bioassays of whitefly field strains by leaf dip were performed with the susceptible strain as well. Determination of the eifectiveness of 20 insecticides typical of three foregoing year belonging to 7 classes revealed that Insect Growth Regulators were in the first potency arrangement, carbamate derivatives still effective and imidacloprid come up to the development of resistance. In addition to all insecticides resistance levels tend to arise than before, fenitrothion, chlorpyrifos-methyl and pirimiphos-methyl supposed to be neglect from the future control. | ||
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