Agrafioti Paraskevi, Faliagka Sofia, Lampiri Evagelia, Orth Merle, Pätzel Mark, Katsoulas Nikolaos, Athanassiou Christos G
Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Phytokou str., 38446 Volos, Magnesia, Greece.
Laboratory of Agricultural Constructions and Environmental Control, Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Phytokou Street, 38446 Volos Magnesia, Greece.
Nanomaterials (Basel). 2020 Aug 24;10(9):1658. doi: 10.3390/nano10091658.
Insect proof nets are widely used in agriculture as mechanical and physical barriers to regulate pest populations in a greenhouse. However, their integration in the greenhouse ventilation openings is highly associated with the decrease of air flow and the adequate ventilation. Thus, there is need for alternative pest management tools that do not impair adequate ventilation. In the present study, we tested four net formulations of relatively large mesh size coated with SiO nanoparticles, namely, ED3, ED3-P, ED5, and ED5-P to evaluate their insecticidal properties against adults of and and larvae of . ED3 and ED5 nets were coated with SiO nanoparticles of different diameter, while in the case of ED3-P and ED5-P, paraffin was added to increase the mass of the deposited particles on the net's surface. In the first series of bioassays, the knockdown and mortality rates of these species were evaluated after exposure to the aforementioned net formulations for 5, 10, 15, 20, 25, 30, 60, 90, and 180 min. In the second series of bioassays, knockdown and mortality of these species were recorded after 1, 7, and 10 days of post-exposure to the nets for different time intervals (15, 30, and 60 min). Based on our results, all nets significantly affected since all insects were dead at the 1-day post-exposure period to the silica-treated nets. Conversely, at the same interval, no effect on either adults or larvae was observed. However, in the case of , the efficacy of all nets reached 100% 7 days after the exposure, even for adults that had been initially exposed for 15 min to the treated nets. Among the species tested, larvae exhibited the lowest mortality rate, which did not exceed 34% at the 10 days of post-exposure interval. Our work underlines the efficacy of treated nets in pest management programs, under different application scenarios, at the pre- and post-harvest stages of agricultural commodities.
防虫网在农业中被广泛用作机械和物理屏障，以调节温室中的害虫数量。然而，它们在温室通风口的整合与气流减少和充分通风高度相关。因此，需要不损害充分通风的替代害虫管理工具。在本研究中，我们测试了四种涂有SiO纳米颗粒的相对大网眼尺寸的网制剂，即ED3、ED3-P、ED5和ED5-P，以评估它们对[两种害虫成虫名称]成虫和[另一种害虫幼虫名称]幼虫的杀虫特性。ED3和ED5网涂有不同直径的SiO纳米颗粒，而在ED3-P和ED5-P的情况下，添加了石蜡以增加沉积在网表面的颗粒质量。在第一系列生物测定中，在将上述网制剂暴露5、10、15、20、25、30、60、90和180分钟后，评估这些物种的击倒率和死亡率。在第二系列生物测定中，在将网暴露于不同时间间隔（15、30和60分钟）后的1、7和10天，记录这些物种的击倒率和死亡率。根据我们的结果，所有网对[第一种害虫名称]都有显著影响，因为在暴露于二氧化硅处理的网后的1天，所有昆虫都死亡。相反，在相同间隔内，未观察到对[第二种害虫成虫名称]成虫或[第三种害虫幼虫名称]幼虫有任何影响。然而，对于[第四种害虫名称]，即使对于最初仅暴露于处理过的网15分钟的成虫，所有网的功效在暴露7天后也达到了100%。在所测试的物种中，[第三种害虫幼虫名称]幼虫表现出最低的死亡率，在暴露后10天的间隔内不超过34%。我们的工作强调了处理过的网在不同应用场景下，在农产品收获前和收获后阶段的害虫管理计划中的功效。
