Keszthelyi Sándor, Lukács Helga, Pál-Fám Ferenc
Department of Plant Production and Protection, Institute of Plant Science, Faculty of Agricultural and Environmental Sciences, Kaposvár University, H-7400 Kaposvár, Hungary.
Insects. 2021 Jan 25;12(2):102. doi: 10.3390/insects12020102.
(L.) is an important pest of stored grain worldwide. In recent years, sustainable methods against it have received attention as grain stock protective means. Our aim was to obtain information about the efficacy of infrared irradiation (IR) against in laboratory conditions. The change in adult-activity and median lethal dose (LD) triggered by IR in was examined. The insecticidal efficacy in the infested grains was also analyzed at 12, 24, 48, and 72h following exposure to IR (250W), and the progeny-production was assessed 45 days upon the treatment. Based on our findings, total mortality ensued in a grain stock of 50 g at 412 s and a for 100 g grain at 256 s. A significant increase in mortality could be observed in the higher grain weight regime, which can be accounted for by the higher heat-absorbance of objects with higher weight. The activity of pests immediately after the beginning of IR increased and subsequently became moderated. The observation of activity-peak brought about by irradiation contribute to the optimization of chemical intervention. This treatment could provide an effective and sustainable technique in integrated pest management.
（L.）是全球储存谷物的一种重要害虫。近年来，作为谷物储存保护手段，针对它的可持续防治方法受到关注。我们的目的是获取在实验室条件下红外辐照（IR）对（该害虫）防治效果的信息。研究了IR引发的该害虫成虫活动变化和半数致死剂量（LD）。还分析了在暴露于IR（250W）后12、24、48和72小时受侵染谷物中的杀虫效果，并在处理后45天评估后代繁殖情况。根据我们的研究结果，50克谷物样本在412秒时全部死亡，100克谷物样本在256秒时全部死亡。在谷物重量较大的情况下，可观察到该害虫死亡率显著增加，这可归因于重量较大物体的更高吸热量。IR开始后害虫的活动立即增加，随后趋于平稳。对辐照引发的活动峰值的观察有助于优化化学防治措施。这种处理方法可为综合害虫管理提供一种有效且可持续的技术。
