Behavioral Responses of an Aphid and its Wasp Parasitoid to 3 Kinds Standard Components Volatiles of Rosemary Plants (Rosmarinus officinalis)

Y-tube olfactometer was used to conduct the orientation responses of Myzus persicae(Sulzer) and its wasp parasitoid Diaeretiella rapae(M'Intosh) to the main three kinds of volatiles(α-Pinene、β-Myrcene、β-Caryophyllene) of the woody perennial herb Rosemary(Rosmarinus officinalis, family Lamiaceae). We found that from the different doses tested, volatiles emitted from α-Pinene showed obviously repellent effects onto Myzus persicae and Diaeretiella rapae. but obviously attracted by β-Myrcene. β-Caryophyllene had no biological activities to Myzus persicae,but showed obviously attracted effects onto Diaeretiella rapae .