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Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (36): 138-145.doi: 10.11924/j.issn.1000-6850.casb2022-0058

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Psidium guajava Essential Oil: Extraction, Component Identification and Bioactivity Against Red Imported Fire Ant

SHAO Xuehua(), LAI Duo, XIAO Weiqiang, LIU Chuanhe, HE Han, KUANG Shizi()   

  1. Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (MARA)/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou 510640
  • Received:2022-02-02 Revised:2022-05-02 Online:2022-12-25 Published:2023-01-17

Abstract:

In order to investigate the fumigation activity of guava essential oil (EO) against red imported fire ants (RIFA), the bioactivity analysis of essential oil against RIFA was determined by fumigation and gas chromatography-mass spectrometry (GC-MS). 31 compounds were identified in EO, and caryophyllene (37.86%) was the major constituent in EO. The bioactivity test showed that when RIFA were fumigated for 48 h with 20 µL/tube of EO, the mortality rate reached more than 90%. After fumigation for 9 h, the aggregation rate was decreased by 78%, the climbing rate was decreased by 45%, the grabbing rate was decreased by 34%, and the walking rate was decreased by 30%. When RIFA were fumigated for 48 h with 10 µL/tube of EO, the catalase (CAT) and carboxylesterase (CarE) activities in vivo were decreased by 56.62% and 58.57%, respectively. The composition of piperidine compounds secreted by RIFA venom glands was decreased by 50%. In summary, the EO of guava has a good fumigation activity against RIFA, and it could inhibit the behavioral ability, enzyme activity and alkaloid secretion of RIFA. This study could provide a theoretical basis for the in-depth development of guava and the biological control of RIFA.

Key words: guava, essential oil, red imported fire ant, fumigation activity, behavioral ability