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Nature of Lindane Resistance in the Laboratory and Field Strains of Tribolium castaneum Herbst (Coleoptera: Tenebrionidae)
Published online by Cambridge University Press: 19 September 2011
Abstract
Laboratory strain-R of Tribolium castaneum, resistant to lindane and multi-resistant strain-L, having developed resistance to lindane and malathion under field conditions, were compared with the standard susceptible strain-S for the nature of resistance to different groups of insecticides. Lindane resistance in both the strains extended to aldrin, dieldrin, endrin and heptachlor. Unlike laboratory strain-R, resistance did not extend to endosulfan in the field strain-L. Both the strains were found susceptible to p, p′-DDT, methoxychlor and allethrin. Also, lindane resistance did not extend to organophosphorous insecticides, viz., malathion, fenitrothion and dichlorovos. Lindane resistance extended to carbaryl and carbofuran, and only slightly to propoxur in the laboratory strain-R, whereas field strain-L remained susceptible to this group of insecticides. Synergist piperonyl-butoxide was found to overcome cross-resistance to endosulfan and propoxur, but to carbaryl in the lindane resistant strain-R. It is, therefore, indicated that one of the three mechanisms responsible for lindane resistance in the laboratory strain of T. castaneum, was stable in the field strain. Thus, the other two mechanisms showing cross-resistance to endosulfan and carbamates were unstable.
Résumé
La souche de laboratoire-R de Tribolium castaneum, resistante au lindane et la souche multiresistante-L, ayant developpées, une resistance au lindane et au malathion en condition au champ (field condition), ont ete comparees avec la souche standart sensible-S pour connaitre le týpe de resistance à differents groups d'insecticides. La resistance au lindane pour les deux sauches s'st etendue 'aldrin, au dieldrin, à l'endrin et à l'heptachlor. La resistance differente de la souche de laboratoire e ne s'st pas etendue a o'endosulfan pour la sauche au champ-L. Les deux sauches ont éte identitiees camme sensible au p, p'-DDT, au methoxychlor et a l'allethrin. Egalement, la resistance au lindane ne s'st pas etendue aux insecticides organophosphores tels malathion, fenitrothion et dichlorovos. La resistance au lindane s'st etendue au carbaryl et au carbofuran, legerement au propoxur paur la sauche de laborateire-R, alons que la sauche au champs-L est restee sensible a ce groupe à insecticides, L'association en synergie piperonyl-butoxide vient à pout de la resistance croijée a l'endosulfan et au propoxur mais non a celle de la sauche-R (résistance au lindane), au carbaryl. Par consequent, cela indiqus que l'un des trois mechanisms, responsibles de la resistance au lindane de la sauche de laborateire T. castaneum est stable dans la sauche au champs. De meme, les deux autres mechanismes mantrant la resistance croijee à l'endosulfan et au carbamate sont instables.
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