Relative attractiveness of the major components of Mylabris phalerata extract to Solenopsis invicta
Author of the article:ZHONG Jia-Mei1, 2 XU Jin-Zhu1 LING Si-Quan1 YAN Zheng3 QIN Chang-Sheng1 XIA Bin2 HONG Zi-Qion
Author's Workplace:1. Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry; 2. College of Life Science, Nanchang University; 3. College of Ecology, Lanzhou University; 4. College of Plant Protection, South China Agricultural University
Key Words:Solenopsis invicta; Mylabris phalerata; GC-MS; EAD; attractant effect
Abstract:
【Aim】 To determine the attractiveness of the major
components of Mylabris phalerata extracts to Solenopsis invicta with
the aim of finding an effective lure to improve the monitoring and control of this pest. 【Methods】 The
composition of M. phalerata hexane extracts was determined using gas
chromatography-mass spectrometry (GC-MS). The antennal electrophysiological
responses of S. invicta to M.
phalerata extracts, and six major components of these, were determined
using gas chromatography-electroantennographic detection (GC-EAD) and the
behavioral responses of workers, females, and male alates to these compounds
were determined using an animal trajectory tracking system (Ethovision XT). 【Results】 Thirteen compounds were identified in the extracts. The most abundant was
9-octadecenoic acid, (E)-, which comprised 49.76% ± 1.04% of the total
and had an individual content of (1.66 ± 0.4) mg. GC-EAD results indicate that
six compounds, namely menthyl acetate, isomenthyl acetate, cantharidin,
palmitic acid, 9-octadecenoic acid, (E)-, and ethyl oleate, elicited EAD
responses. The behavioral experiments indicate that M. phalerata extract, 9-octadecenoic acid, (E)-, and ethyl oleate were significantly
more attractive to S. invicta workers
(P < 0.05),
females, and male alates than the control substance. In contrast, menthyl
acetate was repellent to workers, females, and male alates. 【Conclusion】 9-octadecenoic acid, (E)- and ethyl oleate are major components of M.
phalerata extracts that are attractive to S. invicta. Consequently, there is potential to use these compounds
as attractants to monitor and control
this pest.