The high yield loss reported from the infestations of fruits by Bactrocera invadens Drew, Tsuruta and White in West Africa can impact negatively on the growth of horticulture in the region. Similarly, the shortage of insecticides specifically registered for the control of this pest in Ghana makes decision by farmers on which insecticide to use against this pest uncertain and risky. The result for the acute lethal toxicity shows that the lethal concentration (LC) values of the tested insecticides are 0.59 (diazinon (Diazol)), 0.81 (chlorpyrifos (Pyrinex)), 1.21 (cypermethrin+dimethoate (Cydim super)), and 3.12 (deltamethrin (Deltapaz)) ml L−1 of water. The result for the residual toxicities of three concentrations for each of the tested insecticides shows that the lethal times LT (LT50 and 90) for the adult B. invadens differed significantly for all the ages of the residues. Some insecticides exhibited low lethal time even on panels that are up to 6 days old after treatment. We concluded that the acute lethal toxicity of the insecticides from most-to-least toxic are diazinon (Diazol) > chlorpyrifos (Pyrinex) > cypermethrin + dimethoate (Cydim super) > deltamethrin (Deltapaz). The residual toxicity of the label rates of all the insecticides are equal to those of the higher doses but better than those of the least doses. The implication of these findings for the management of B. invadens has been discussed.

中文翻译：

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一些选定的杀虫剂对入侵德鲁、鹤田和白实蝇（双翅目：实蝇科）的成年实蝇的急性和残留浓度依赖性毒性

据报道，西非的 Drew、Tsuruta 和 White 的实蝇侵染果实造成高产损失，可能对该地区的园艺生长产生负面影响。同样，加纳专门登记用于控制这种害虫的杀虫剂短缺，这使得农民决定使用哪种杀虫剂来对付这种害虫具有不确定性和风险。急性致死毒性结果表明，受试杀虫剂的致死浓度（LC）值为0.59（二嗪农（Diazol））、0.81（毒死蜱（Pyrinex））、1.21（氯氰菊酯+乐果（Cydim super））和3.12 (溴氰菊酯 (Deltapaz)) ml L−1 水。每种测试杀虫剂的三个浓度的残留毒性结果表明，成虫的致死时间为 LT（LT50 和 90）。入侵者对所有年龄的残留物都有显着差异。一些杀虫剂即使在处理后长达 6 天的面板上也显示出低致死时间。我们得出结论，杀虫剂的急性致死毒性从毒性最大到最小依次为二嗪农 (Diazol) > 毒死蜱 (Pyrinex) > 氯氰菊酯 + 乐果 (Cydim super) > 溴氰菊酯 (Deltapaz)。所有杀虫剂标记率的残留毒性与较高剂量的相同，但优于最小剂量的残留毒性。已经讨论了这些发现对入侵 B. 管理的意义。毒死蜱 (Pyrinex) > 氯氰菊酯 + 乐果 (Cydim super) > 溴氰菊酯 (Deltapaz)。所有杀虫剂标记率的残留毒性与较高剂量的相同，但优于最小剂量的残留毒性。已经讨论了这些发现对入侵 B. 管理的意义。毒死蜱 (Pyrinex) > 氯氰菊酯 + 乐果 (Cydim super) > 溴氰菊酯 (Deltapaz)。所有杀虫剂标记率的残留毒性与较高剂量的相同，但优于最小剂量的残留毒性。已经讨论了这些发现对入侵 B. 管理的意义。