Influence of olfactory learning on host selection behavior in Bactrocera dorsalis (Diptera: Tephritidae)
Insects can search for host more efficiently by olfactory learning. Bactrocera dorsalis has been proved that it has strong olfactory learning capability. To explore the influence of olfactory learning on its host selection behavior, we trained B. dorsalis to associate an odor, sweet orange essential...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2019-04-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2018.05.071 |
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| Summary: | Insects can search for host more efficiently by olfactory learning. Bactrocera dorsalis has been proved that it has strong olfactory learning capability. To explore the influence of olfactory learning on its host selection behavior, we trained B. dorsalis to associate an odor, sweet orange essential oil, with a food, 10% sucrose solution, under laboratory conditions using a classical olfactory conditioning procedure, and the proboscis extension reflex was used as the criterion for conditioning. Its preference for orange odor and orientation behavior elicited by orange odor before and after training also were tested. The selection behavior and trend behavior of B. dorsalis after learning were determined. The results showed that B. dorsalis can associate the orange odor with the sucrose solution, and the proportion of proboscis extension reflex of B. dorsalis increased from 8.1% to 75.7% after five conditioning trials, and the memory formed with conditioning could last at least 6 h. In the Y-tube choice test, B. dorsalis chose the arm containing trained orange odor more often after five conditioning trials compared with before training (increased from 35.3% to 63.7%). In the wind tunnel test, the percentage of B. dorsalis located orange odor after conditioning increased from 8.3% to 52.5% compared with before conditioning. The results indicated that B. dorsalis has a strong capability to learn orange odor, and they tended to choose the trained orange odor after learning, which might be related with host searching behavior. Our studies also can provide an important reference on behavior regulation of B. dorsalis. |
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| ISSN: | 1008-9209 2097-5155 |