Quantitative analysis and characterization of floral volatiles, and the role of active compounds on the behavior of Heortia vitessoides

This study explores the role of floral volatile organic compounds (FVOCs) in insect behavior, focusing on <i>Aquilaria sinensis</i> (AS), a valuable tropical plant threatened by <i>Heortia vitessoides</i> Moore. Despite <i>H. vitessoides</i>' attraction to AS and non-host plants like <i>Elaeocarpus decipiens</i> (ED) and <i>Dalbergia odorifera</i> (DO), little is known about their chemical interactions. FVOCs from these plants were analyzed at 9:00 and 18:00 using GC×GC-QTOF-MS and HS-SPME. The results showed that ED exhibiting the highest concentration (92.340 ng/mg), followed by DO (75.167 ng/mg) and AS (64.450 ng/mg). Through GC-EAD and EAG, a total of 11 FVOC compounds with electrophysiological activates were identified. These compounds, except linalool, showed dose-dependent responses. Y-Tube bioassays confirmed phenylethyl alcohol or the mixture of EAD-active compounds produced positive chemotactic responses in both males and females. FVOCs have the potential to be used as a natural and sustainable alternative to chemical insecticides in pest control.