Resistance of the pink bollworm, Pectinophora gossypiella (saunders) to the developmental insecticides chlorfluazuron and flufenoxuron [electronic resource].

Includes references.

Development of resistance to the developmental insecticides chlorfluazuron and flufenoxuron in the newly hatched larvae of the pink bollworm, Pectinophora gossypiella (Saunders), laboratory and field colonies were investigated in the laboratory. It was found that the rate of building up of resistance to both insecticides was high. Resistance ratios of chlorfluazuron in the laboratory and field colonies ranged between 3.3- to 1022.3- and 2.4to 376.48-fold, respectively. The corresponding figures of flnfenoxuron ranged between 2.7- to 489.9- and 1.1- to 209.6- fold. The rate of building up of resistance was faster in the laboratory colony than with the field one. Conceming the relative efficacy of both compounds, data show that chlorfluazuron exhibited higher capacity in the rate of building up of resistance in both colonies.

Summary in Arabic.

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