Lopes Lucas Martins, Faroni Lêda Rita D'Antonino, Silva Gutierres Nelson, Barbosa Douglas Rafael E Silva, Carvalho Marcela Silva, Martins Herus Pablo Firmino, Santos Thaís Rodrigues Dos, Dias Igor da Silva, Sousa Adalberto Hipólito de
Center of Biological and Natural Sciences, Federal University of Acre, Rio Branco 69920-900, AC, Brazil.
Federal Institute of Amazonas, Eirunepé 69880-000, AM, Brazil.
Insects. 2025 Jul 6;16(7):697. doi: 10.3390/insects16070697.
Essential oils have emerged as promising alternatives for pest insect control. However, sublethal effects on insect reproduction and development are rarely explored, despite their relevance to integrated pest management (IPM). This study evaluated the sublethal effects of C. DC. essential oil (EOPH) on the development and population growth of four populations of Motschulsky (Coleoptera: Curculionidae), as well as the persistence of safrole residue in treated corn grains. Population development rates were determined using emergence curves and total emerged adults, while population growth was assessed by counting live insects in the feeding substrate at different storage intervals. Safrole residue persistence was analyzed using solid-phase microextraction in headspace mode (SPME-HS). Sublethal exposure to EOPH significantly reduced the development rate, total emergence, and growth in three of the four populations. The population from Crixás, GO, showed no significant reduction, with a population curve overlapping the control. The lethal dose was reduced by 98.20%, indicating low persistence and potential food safety. The EOPH exhibited sublethal effects on populations, reducing both development rates and population growth. This reduction varied among the populations studied. Further research is encouraged to explore its effects on different insect populations and under broader environmental conditions.
精油已成为害虫防治的有前景的替代方法。然而，尽管其与害虫综合治理（IPM）相关，但对昆虫繁殖和发育的亚致死效应却很少被探究。本研究评估了C. DC. 精油（EOPH）对四种Motschulsky（鞘翅目：象甲科）种群的发育和种群增长的亚致死效应，以及处理过的玉米粒中黄樟素残留的持久性。使用羽化曲线和总羽化成虫来确定种群发育率，同时通过在不同储存间隔期对取食基质中的活昆虫进行计数来评估种群增长。使用顶空模式固相微萃取（SPME-HS）分析黄樟素残留的持久性。亚致死剂量的EOPH显著降低了四个种群中三个种群的发育率、总羽化率和种群增长。来自戈亚斯州克里沙斯的种群没有显著降低，其种群曲线与对照重叠。致死剂量降低了98.20%，表明其持久性低且具有潜在的食品安全问题。EOPH对种群表现出亚致死效应，降低了发育率和种群增长。这种降低在研究的种群中有所不同。鼓励进一步研究以探索其在更广泛环境条件下对不同昆虫种群的影响。
