Abstract Laboratory bioassays (temperature 26 ± 1 °C and 60 ± 5% r. h.) were performed to evaluate the insecticidal effect of three different diatomaceous earths (DE) against Rhyzopertha dominica (F.) in wheat, triticale and rye. In order to achieve this, the amount of damaged kernels, amount of debris, wet gluten content, gluten index and rheological properties were assessed in infested samples, infested samples treated with DE Protect-It and two DEs originating from Serbia (S-1 and S-2) and were compared to control (uninfested) samples using Chopin Mixolab. The most susceptible to beetle infestation were rye sample and wheat variety Planeta. The lowest weight of damaged grain was found after applying DE Protect-It to all grain types. The amount of damaged kernels, the amount of debris and loss of mass were the highestin sample treated with DE S-2. While infestation resulted in increase in the amount of damaged kernels and debris and decrease in wet gluten content, and provoked weakening of gluten network structure as well as starch damage, an addition of DE, especially Protect-It, resulted in grain samples of similar technological quality to control (uninfested) sample. The susceptibility of different cereals used in breadmaking to infestation by R. dominica, as well as their response to the insecticidal effect of diatomaceous earth largely varied. Both cereal type and quality, as measured by wet gluten content and gluten index, influenced grain response to infestation. Insecticidal effect of diatomaceous earth, especially DE S-1and DE S-2, was the least effective in terms of triticale. These findings suggest that the application of DE in cereals storage management might largely be affected with grain type as well as grain composition and technological quality.

中文翻译：

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Rhyzopertha dominica (F.) 对硅藻土处理谷物工艺品质的影响

摘要 进行实验室生物测定（温度 26 ± 1 °C 和 60 ± 5% 相对湿度）以评估三种不同的硅藻土 (DE) 对小麦、黑麦和黑麦中的多米尼克根 (Rhyzopertha dominica) (F.) 的杀虫效果。为了实现这一目标，对受感染样品、用 DE Protect-It 处理的受感染样品和来自塞尔维亚的两种 DE（S-1 和S-2) 并使用肖邦 Mixolab 与对照（未感染）样品进行比较。最容易受到甲虫侵扰的是黑麦样品和小麦品种 Planeta。将 DE Protect-It 应用于所有谷物类型后，发现受损谷物的重量最低。损坏的内核数量，用DE S-2处理的样品中碎片的数量和质量损失是最高的。虽然侵染导致受损谷粒和碎屑数量增加，湿面筋含量下降，并引起面筋网络结构减弱和淀粉损伤，但添加DE，尤其是Protect-It，导致类似技术的谷物样品质量控制（未感染）样品。用于面包制作的不同谷物对 R. dominica 侵染的敏感性，以及它们对硅藻土杀虫作用的反应差异很大。通过湿面筋含量和面筋指数衡量的谷物类型和质量都会影响谷物对虫害的反应。硅藻土的杀虫效果，尤其是DE S-1和DE S-2，对小黑麦的杀虫效果最差。