Ogreten Ayhan, Eren Sedat, Mutlu Cetin, Ayaz Tarkan, Saeed Amna, Bingham Georgina V, Morrison William R
Plant Protection Research Institute, Diyarbakir 21110, Türkiye.
Department of Plant Protection, Faculty of Agriculture, Harran University, Sanliurfa 63300, Türkiye.
Insects. 2025 May 22;16(6):549. doi: 10.3390/insects16060549.
Stored grain pests cause significant economic losses during cereal grain storage. Insecticides have long been central to pest control; however, growing concerns over resistance, environmental harm, and human health demand alternative strategies. Diatomaceous earth (DE) treatments are a safe, eco-friendly alternative to insecticides, although their efficacy depends on the temperature, humidity, dose, and insect species. This study assessed the insecticidal effects of two natively-sourced raw (Ankara and Aydin) and one commercial (Silico-Sec) DE treatments against the key pest species (F.) and (L.) on stored wheat. Five doses (0, 250, 500, 750, and 1000 ppm) of each DE treatment were tested under two temperatures (25 °C and 30 °C) and two humidity levels (40% and 60%). Mortality was assessed at 7, 14, and 21 days after treatment (DAT). All DE treatments caused higher mortality in than . The highest mortality occurred in at 30 °C and 40% RH with the highest dose. Aydin DE was most effective, but did not reach 100% mortality in by 21 DAT. In contrast, it caused 100% mortality in under the same conditions. There was no F progeny produced by surviving individuals of both species. Given the similarity of the environmental conditions to the optimal conditions for DE efficacy present in Turkish storage facilities, natively sourced Aydin DE is a promising control option.
储粮害虫在谷物储存期间会造成重大经济损失。长期以来，杀虫剂一直是害虫防治的核心手段；然而，人们对耐药性、环境危害和人类健康的担忧与日俱增，这就需要采用替代策略。硅藻土（DE）处理是一种安全、环保的杀虫剂替代品，不过其效果取决于温度、湿度、剂量和昆虫种类。本研究评估了两种本地来源的原生硅藻土（安卡拉和艾登）以及一种商业硅藻土（Silico-Sec）对储存小麦上的主要害虫物种（F.）和（L.）的杀虫效果。在两种温度（25°C和30°C）和两种湿度水平（40%和60%）下，对每种DE处理的五个剂量（0、250、500、750和1000 ppm）进行了测试。在处理后7天、14天和21天评估死亡率。所有DE处理对（某种害虫，原文未明确）的死亡率均高于（另一种害虫，原文未明确）。在30°C和40%相对湿度下，使用最高剂量时，（某种害虫，原文未明确）的死亡率最高。艾登硅藻土最有效，但在处理后21天，（某种害虫，原文未明确）的死亡率未达到100%。相比之下，在相同条件下，它对（另一种害虫，原文未明确）造成了100%的死亡率。两种害虫的存活个体均未产生F后代。鉴于环境条件与土耳其储存设施中DE发挥功效的最佳条件相似，本地来源的艾登硅藻土是一种很有前景的防治选择。
