The effect of （1-（4-chlorophenyl）-3-（2,6-difluorobenzoyl）urea） insecticide - diflubenzuron - on wild type and white type fruit flies Drosophila melanogaster （Meigen, 1830） was studied. Adult insects were place...The effect of （1-（4-chlorophenyl）-3-（2,6-difluorobenzoyl）urea） insecticide - diflubenzuron - on wild type and white type fruit flies Drosophila melanogaster （Meigen, 1830） was studied. Adult insects were placed in vials with different concentrations of the insecticide in the nutrient （from 0.048 to 48 mg of diflubenzuron per 1 cm^3 of the nutrient）. In each case, the insects showed some mortality, which was concentrationdependant. When comparing both strains, we could observe different acute toxicities, with wild type being more resistant to diflubenzuron. However, subacute toxicity was similar within both strains. In both strains the prolonged exposure led to the extinction of the majority of the populations （〉 70%）. Although imagoes could freely copulate, we did not observe copulating fruit flies, and we did not find either eggs or larvae in any of the exposed groups. These results indicate that genetic mutation which leads to different eye colour can also affect resistance and survival of insects in pesticide-exposed areas.展开更多
文摘The effect of （1-（4-chlorophenyl）-3-（2,6-difluorobenzoyl）urea） insecticide - diflubenzuron - on wild type and white type fruit flies Drosophila melanogaster （Meigen, 1830） was studied. Adult insects were placed in vials with different concentrations of the insecticide in the nutrient （from 0.048 to 48 mg of diflubenzuron per 1 cm^3 of the nutrient）. In each case, the insects showed some mortality, which was concentrationdependant. When comparing both strains, we could observe different acute toxicities, with wild type being more resistant to diflubenzuron. However, subacute toxicity was similar within both strains. In both strains the prolonged exposure led to the extinction of the majority of the populations （〉 70%）. Although imagoes could freely copulate, we did not observe copulating fruit flies, and we did not find either eggs or larvae in any of the exposed groups. These results indicate that genetic mutation which leads to different eye colour can also affect resistance and survival of insects in pesticide-exposed areas.
