Abstract The persistence of a commercially available diatomaceous earth (DE) formulation (SilicoSec®) against Sitophilus granarius, Rhyzopertha dominica and Tribolium confusum on wheat at four dose rates (500–2000 mg/kg) during a 360-day period of storage was assessed. Mortality of S. granarius were 76.0, 88.4, 93.2 and 95.6% at 7, 14, 21, and 28 days, respectively at 0 month at a dosage of 2000 mg/kg, whereas the corresponding values were 31.5%,71.3, 87.2 and 96.8 at 12 months with the same dosage. Mortality of R. dominica were 48.0, 79.6, 86.4 and 90.0% at 7, 14, 21, and 28 days, respectively at 0 month at a dosage of 2000 mg/kg, whereas the corresponding values were 82.7, 95.2, 98.0 and 98.8% at 12 months with the same dosage. Mortality of T. confusum were 82.1, 96.8, 98.8 and 100.0% at 7, 14, 21, and 28 days, respectively at 0 month at a dosage of 2000 mg/kg, whereas the corresponding values were 32.8, 99.6, 100.0 and 100.0% at 12 months with the same dosage. The increase in mortalities obtained from 1500 to 2000 mg/kg for each of the three species were mostly insignificant at 28 d exposure. Therefore, wheat treated with SilicoSec® at a dosage of 1500 mg/kg could be satisfactorily protected against S. granarius, T. confusum and R. dominica for a year.

中文翻译：

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硅藻土、SilicoSec® 对三种储存的谷物甲虫的持久性

摘要 评估了一种市售硅藻土 (DE) 制剂 (SilicoSec®) 在 360 天的储存期内以四种剂量率 (500–2000 mg/kg) 对小麦上的 Sitophilus granarius、Rhyzopertha dominica 和 Tribolium confusum 的持久性。 . 在剂量为 2000 mg/kg 时，第 7、14、21 和 28 天时，S.granarius 的死亡率分别为 76.0、88.4、93.2 和 95.6%，而相应的值为 31.5%、71.3、87.2 和 87.2%。 96.8 在 12 个月相同剂量。在剂量为 2000 mg/kg 时，在第 7、14、21 和 28 天时，R. dominica 的死亡率分别为 48.0、79.6、86.4 和 90.0%，而相应的值为 82.7、95.2、98.0 和 98。 % 在 12 个月时使用相同的剂量。在第 7、14、21 和 28 天，T. confusum 的死亡率分别为 82.1、96.8、98.8 和 100.0%，分别在0个月剂量为2000mg/kg时，而在相同剂量下12个月时相应值分别为32.8%、99.6%、100.0%和100.0%。在暴露 28 天时，三种物种中每一种的死亡率从 1500 到 2000 毫克/千克的增加几乎不显着。因此，用 1500 mg/kg 剂量的 SilicoSec® 处理的小麦可以在一年内令人满意地防止 S. granarius、T. confusum 和 R. dominica。