Behavioral, Electrophysiological, and Toxicological Responses of to Extracts from .

L. is a destructive pest affecting cruciferous vegetables, causing massive economic losses worldwide. Plant-based insecticides are considered promising insect control agents. The extract inhibited female oviposition, with an oviposition deterrence index (ODI) of 61.65% at 12.5 mg/mL. We aimed to identify the bioactive compounds in extract. The compounds from extract were analyzed using LC-MS techniques. The toxicity and behavioral responses of larvae and adults of to ten compounds were investigated. We found that the caryophyllene oxide and 3,4-dimethoxycinnamic acid inhibited female oviposition; the ODIs were 98.31% and 97.59% at 1.25 mg/mL, respectively. The extract, caryophyllene oxide, and 3,4-dimethoxycinnamic acid caused larval mortality, with LC values of 21.31, 4.56, and 5.52 mg/mL, respectively. The EAG response of females was higher than that of males under extract conditions, while the EAG response of males was higher than that of females in caryophyllene oxide and 3,4-dimethoxycinnamic acid conditions. The extract and caryophyllene oxide showed repellent activity against both female and male adults, while the 3,4-dimethoxycinnamic acid did not elicit any notable behavioral responses from adults. extract and caryophyllene oxide are potential insecticides, oviposition deterrents, and behavioral regulators against , and they could be potential candidates for the development of biological insecticides to control .