| Title: | Electroantennographic and olfactory responses of Quadrastichus mendeli to eucalyptus volatiles induced by the gall-forming insect Leptocybe invasa |
| Author(s): | Huang ZY; Liu ZJ; Wang XY; Zhang ZL; Lu W; Zheng XL; |
| Address: | "Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, College of Agriculture, Guangxi University, Nanning, China. Hubei Key Laboratory of Quality Control of Characteristic Fruits and Vegetables, College of Life Science and Technology, Hubei Engineering University, Xiaogan, China" |
| ISSN/ISBN: | 1526-4998 (Electronic) 1526-498X (Linking) |
| Abstract: | "BACKGROUND: Although parasitoids can precisely locate hidden gall-inducing insects, the host location mechanism is unknown. In this study, our aim was to clarify the olfactory responses of the parasitoid Quadrastichus mendeli to eucalyptus volatiles induced by the gall wasp Leptocybe invasa. RESULTS: Q. mendeli preferred volatiles from gall-damaged plants compared with those produced by mechanically damaged and undamaged plants. Coupled gas chromatographic-electroantennographic detection results demonstrated that 3-carene, decanal, d-limonene, ethanone,1-(4-ethylphenyl)-, p-cymene and benzene,1-methyl-4-(1-methylpropyl)- from DH 201-2 (Eucalyptus grandis x Eucalyptus tereticornis) elicited significant antennal responses in Q. mendeli in all treatments. Q. mendeli was repelled by decanal and d-limonene and was attracted to 3-carene, benzene,1-methyl-4-(1-methylpropyl)-, ethanone,1-(4-ethylphenyl) and p-cymene. Quaternary blends containing 3-carene, p-cymene, benzene,1-methyl-4-(1-methylpropyl)- and ethanone,1-(4-ethylphenyl)- at a ratio of 1:1:1:1 were attractive to Q. mendeli. However, quaternary blends with added decanal and d-limonene alone or both together induced significant repellence in Q. mendeli. CONCLUSION: Our report is the first to demonstrate that volatiles produced by galls induced by L. invasa are attractive to Q. mendeli, which suggests that this parasitoid could utilize herbivore-induced plant volatiles to locate its host. The results are beneficial for understanding the function of plant volatiles in host searching by parasitoids of gall-forming insect pests. (c) 2022 Society of Chemical Industry" |
| Keywords: | Animals Benzene *Eucalyptus Limonene *Wasps gall-inducing insects host location parasitoids plant volatiles; |
| Notes: | "MedlineHuang, Zong-You Liu, Zuo-Jun Wang, Xiao-Yun Zhang, Zhi-Lin Lu, Wen Zheng, Xia-Lin eng Guangxi Natural Science Foundation (Grant No. 2018GXNSFAA138099)/ Guangxi Scholarship Fund of Guangxi Education Department/ National Natural Science Foundation of China (Grant No. 31870634)/ England 2022/03/16 Pest Manag Sci. 2022 Jun; 78(6):2405-2416. doi: 10.1002/ps.6869. Epub 2022 Mar 30" |
