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Chinese Journal of Biological Control ›› 2023, Vol. 39 ›› Issue (4): 813-823.DOI: 10.16409/j.cnki.2095-039x.2022.11.016

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Tropism Behavior Analysis of Two Drosophila Species to Fruits and Volatiles of Strawberry at Different Mature Stages

ZHANG Xuan, BI Yaluan, FANG Qi, WANG Fang, YE Gongyin   

  1. State Key Laboratory of Rice Biology/College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
  • Received:2022-05-13 Online:2023-08-25 Published:2023-08-25

Abstract: Drosophila melanogaster and D. suzukii attack a variety of economic soft fruits including strawberries Fragaria×ananassa, resulting in huge economic loss. The orientation behaviors of the two Drosophila species to fruits and volatiles of strawberries at different mature stages were analyzed in the present study to screen valuable compounds for the development of fruit fly attractant. Two-choice trap-based bioassays showed that strawberries at all the three mature stages were significantly more attractive to female adults of the two Drosophila species than agar gel. The preference of D. melanogaster and D. suzukii to strawberries at different mature stages ranked from high to low was overripe fruits, red-ripe fruits and white-ripe fruits, but no significant difference was found in the attractiveness between red-ripe fruits and white-ripe fruits. The volatiles from strawberries at different mature stages were collected and analyzed by HS-SPME and GC-MS. It was found that the volatile components from strawberries at red-ripe stage and overripe stage were significantly different. Among the 5 compounds tested, only ethyl acetate had significant attractiveness to the two species of Drosophila females, with effective concentrations ranging from 0.005%-0.05% (v/v).

Key words: Drosophila melanogaster, Drosophila suzukii, strawberry, volatile, tropism behavior

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