Sitophilus zeamais Motschulsky threaten maize (Zea mays L.) storage in the tropical regions of low-income countries where maize is a staple. Disturbance of maize during storage can be an alternative to chemical treatment in suppressing populations of S. zeamais. Disturbance has been successful against insect pests of stored products, i.e. bean weevils, Acanthoscelides obtectus (say) (Coleoptera: Chysomelidae: Bruchinae) and lesser grain borers Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae). Prior research has not established a standard disturbance interval. This study tested various disturbance intervals to see determine suppression of S. zeamais populations in stored maize with four treatments: stationary jars (control) and jars disturbed at intervals of 8, 12 and 24 h. Jars contained 1 kg of 16 ± 0.7% wet basis moisture maize and 234 ± 51 adult S. zeamais stored at 27 °C, 70% r. h. and 12 h light and dark phases. Periodically, electric motors rotated jars through about 1.25 revolutions in 3 s. Three jars were selected randomly from each treatment every 40 d up to 160 d for analysis. Reduction in S. zeamais populations was 75%, 95% and 94% for 8, 12 and 24 h disturbance intervals, respectively, compared to the stationary jars after 160 d. The average quality of maize in all disturbed jars was better than in stationary jars, respectively, for moisture content (13 ± 1.1% vs. 21 ± 1.0%), bulk density (553.5 ± 1.1 kg/m³ vs. 231.7 ± 1.2 kg/m³), broken corn and foreign material (9 ± 1.2% vs. 68 ± 3.9%), insect damage (70 ± 4.5% vs. 100 ± 0.0%), and mold damage (0.4 ± 0.2% vs. 27 ± 17.2%). Disturbances of 12h and 24 h (once per day) proved the best intervals in suppressing S. zeamais populations and maintaining the quality of maize, much longer than previously reported. Of these two intervals, the less frequent 24 h disturbance interval may be an effective non-chemical approach to control S. zeamais in maize stored by smallholder farmers, requiring less effort.

Sitophilus zeamais Motschulsky 威胁低收入国家热带地区的玉米 (Zea mays L.) 储存，这些国家以玉米为主食。储存期间对玉米的干扰可以替代化学处理以抑制S. zeamais种群。干扰已成功对抗储存产品的害虫，即豆象鼻虫、Acanthoscelides obtectus（例如）（鞘翅目：Chysomelidae：Bruchinae）和较小的螟虫Prostephanus truncatus（角）（鞘翅目：Bostrichidae）。先前的研究尚未建立标准的干扰间隔。本研究测试了各种干扰间隔，以确定使用四种处理方法对储存玉米中的 S. zeamais 种群的抑制情况：固定罐（对照）和以 8、12 和 24 小时为间隔扰动的罐。罐子中装有 1 kg 湿基水分为 16 ± 0.7% 的玉米和 234 ± 51 粒成年玉米，储存在 27 °C、70% 相对湿度和 12 小时明暗阶段。电动机周期性地在 3 秒内将罐子旋转约 1.25 圈。每 40 天至 160 天从每个处理中随机选择三个罐子进行分析。与 160 天后的固定罐相比，在 8、12 和 24 小时干扰间隔内，S. zeamais 种群的减少分别为 75%、95% 和 94%。³ vs. 231.7 ± 1.2 kg/m ³）、破碎的玉米和异物（9 ± 1.2% vs. 68 ± 3.9%）、虫害（70 ± 4.5% vs. 100 ± 0.0%）和霉菌损伤（0.4 ± 0.2% 与 27 ± 17.2%）。12 小时和 24 小时（每天一次）的干扰证明了抑制 S. zeamais 种群和保持玉米质量的最佳时间间隔，比以前报告的时间长得多。在这两个间隔中，频率较低的 24 小时干扰间隔可能是一种有效的非化学方法来控制小农储存的玉米中的 S. zeamais，需要较少的努力。