Abstract In this study, the insecticidal activity of the wettable powder formulation of Detech® diatomaceous earth against the rice weevil, Sitophilus oryzae (Coleoptera: Curculionidae), an important stored grain pest, was investigated. Detech® diatomaceous earth was applied on concrete and wooden surfaces at doses of 0.25, 0.5, 1 and 2 g/m2 and the mortality of S. oryzae adults was observed at time intervals of 24, 48, 72, 96, 120, 144, 168, 192, 216, 240, 264 and 288 h. In the first 24 h of application on the concrete and wooden surfaces, no death was observed. At the 48th hour, no effect or very low mortality was observed on the concrete and wooden surface at all doses. While the increase in dose and exposure time on the concrete and wooden surface increased the mortality rate of the adults, complete adult mortality was obtained on concrete surfaces after 288 h. The wettable powder formulation of Detech® diatomaceous earth at a dose of 2 g/m2 is highly effective against rice weevils on wood and concrete surfaces at laboratory conditions, though with greater success on concrete, but the longer DE exposures increase the efficacy on both surfaces.

中文翻译：

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Detech® 硅藻土可湿性粉剂制剂在不同表面应用对稻象鼻虫 Sitophilus oryzae (L.)（鞘翅目： Curculionidae）的功效

摘要 在这项研究中，研究了 Detech® 硅藻土可湿性粉剂制剂对米象甲（鞘翅目：仙茅科）这种重要的储粮害虫的杀虫活性。Detech® 硅藻土以 0.25、0.5、1 和 2 g/m2 的剂量应用于混凝土和木质表面，并在 24、48、72、96、120、144、 168、192、216、240、264 和 288 小时。在混凝土和木质表面上的第一个 24 小时内，没有观察到死亡。在第 48 小时，在所有剂量下，在混凝土和木质表面上均未观察到影响或死亡率非常低。虽然混凝土和木质表面的剂量和暴露时间的增加增加了成年人的死亡率，288 小时后在混凝土表面获得完全的成人死亡率。剂量为 2 g/m2 的 Detech® 硅藻土可湿性粉剂配方在实验室条件下对木材和混凝土表面的稻象虫非常有效，尽管在混凝土上取得了更大的成功，但更长的 DE 暴露时间增加了两个表面的功效.