The attraction assessment of the volatiles from banana and guava fruit against females of the oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae).

• Main Authors: Chia-Ming Liu, 劉家銘
• Other Authors: Yi-Yuan Chuang
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/54138476973985995572

碩士 === 國立中興大學 === 昆蟲學系所 === 102 === This study preliminarily evaluated the attractiveness of fresh fruits against females of the oriental fruit fly, Bactrocera dorsalis. The results showed that native mango (Mangifera indica Linn. cv. Native) and banana (Musa sapientum L. cv. Pei - Chiao) exhibited 2.40 and 2.10 times higher attractiveness than the control, red guava (Psidium guajava cv. Thai Maroon). When analyzed and evaluated the attractiveness of the headspace volatiles of banana and red guava using gas-mass chromatography (GC/MS). The results showed that butyl isovalerate, sec-butyl butyrate, isobutyl isovalerate and amyl butyrate exhibited higher attractiveness than other volatiles of banana, the catch rates for B. dorsalis female being 40.0, 28.0, 23.0 and 28.0%, respectively. There were no significant differences among these four components of banana volatiles. In addition, the attractiveness of the mixture of these four components against B. dorsalis females was not significantly different with their single components. The catch rate of ethyl caproate was 43.3% against B. dorsalis females, exhibiting the highest attractiveness and there were significant differences among the volatiles of red guava. In choice tests between fresh fruits and the components of banana volatiles, the results showed that sec-butyl butyrate exhibited more attractiveness among other components against fruit fly females. There was no significant difference between sec-butyl butyrate and mature or immature fruits of lemon (Citrus limon). Furthermore, sec-butyl butyrate was more attractive than a food attractant, Torula yeast/borax, against fruit fly females whether they were starved or not before experiment. Greenhouse tests of the persistent attractiveness of 5 different carriers, i.e., septa, melamine foam, cotton pad, filter paper, and wood pulp rag, were also conducted. The results showed each carrier contained 20 ?l of sec-butyl butyrate could sustain 9 days in greenhouse. The attractive of 5 carriers were no significant differences in choice test.