Broadhead Geoffrey T, Liu Hui, Sumrall Gretchen L, Block Anna K, Hunter Charles T, Beck John J
Chemistry Research Unit, Center for Medical, Agricultural and Veterinary Entomology, Agricultural Research Service, U.S. Department of Agriculture, Gainesville, Florida 32608, United States.
J Agric Food Chem. 2025 Jan 22;73(3):1835-1843. doi: 10.1021/acs.jafc.4c09665. Epub 2024 Dec 21.
Maize () is a major global food crop and a source of industrial raw materials. Effective postharvest storage is important for national food security programs, international trade, and global agriculture economics. The maize weevil () is a primary postharvest insect pest that infests maize during storage and leads to significant losses. Using multivariate discriminant analysis of volatile profiles collected from intact and infested maize, we identified two volatile apocarotenoids, 6-methyl-5-hepten-2-one and 6-methyl-5-hepten-2-ol, as indicators of maize weevil infestation in stored maize. Emission of these biomarker compounds rapidly signaled maize weevil infestation and showed a significant correlation with oviposition damage to the stored kernels. The pattern of elevated biomarker emission after weevil exposure was consistent across all seven maize lines examined. These volatile biomarkers can be used for early detection and removal of infested maize and can aid in the control of this pest.
玉米（）是一种主要的全球粮食作物和工业原料来源。有效的收获后储存对于国家粮食安全计划、国际贸易和全球农业经济至关重要。玉米象（）是一种主要的收获后害虫，在储存期间侵染玉米并导致重大损失。通过对完整玉米和受侵染玉米收集的挥发性成分进行多变量判别分析，我们鉴定出两种挥发性类胡萝卜素降解产物，6-甲基-5-庚烯-2-酮和6-甲基-5-庚烯-2-醇，作为储存玉米中玉米象侵染的指标。这些生物标志物化合物的释放迅速表明玉米象的侵染，并与储存玉米粒的产卵损伤显示出显著相关性。在所有检测的七个玉米品系中，象鼻虫暴露后生物标志物释放升高的模式是一致的。这些挥发性生物标志物可用于早期检测和清除受侵染的玉米，并有助于控制这种害虫。
