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http://krishi.icar.gov.in/jspui/handle/123456789/2489| Title: | Olfactory responses of banana pseudostem weevil, Odoiporuslongicollis Olivier (Curculionidae: Coleoptera) to semiochemicals from conspecifics and host plant. |
| Authors: | Prasuna A.L, K.N Jyothi, A.R Prasad, J.S Yadav and B Padmanaban. |
| Published/ Complete Date: | 2008-04-01 |
| Keywords: | Banana pseudostem weevil, electroantennogram, olfactory responses, semiochemicals, volatile extracts. |
| Publisher: | EBSCO Host |
| Citation: | Prasuna A.L, K.N Jyothi, A.R Prasad, J.S Yadav and B Padmanaban. 2008 . Olfactory responses of banana pseudostem weevil, Odoiporuslongicollis Olivier (Curculionidae: Coleoptera) to semiochemicals from conspecifics and host plant. Curr. Sci., 94(7):896-900. |
| Abstract/Description: | Electroantennogram and olfactometer bioassays were conducted to study the olfactory behaviour of banana pseudostem weevil (BSW), Odoiporus longicollis Olivier (Coleoptera: Curculionidae), to semiochemicals from conspecifics and host plants. Hexane extracts of whole-body chemicals of male and female weevils, host plant (banana pseudostem sheath) and combinations of weevil extracts and host plant extracts were used as stimuli or odour source in both electrophysiological and behavioural tests. BSW weevils exhibited sexspecific differences in responsiveness towards stimulus extracts in both the assays and males showed greater responsiveness in all the experiments. Female weevils were not responsive to their own body extracts, but showed significant responses towards male extracts. Male weevils were responsive to both male and female extracts. The present study provides electrophysiological and behavioural evidence that the olfactory behaviour behaviour in O. longicollis weevils is more precisely mediated through the male specific volatiles (aggregation pheromone). These findings also provide necessary information for developing an ecologically safe semiochemical-based control method for O. longicollis. |
| Description: | ODOIPORUS LONGICOLLIS Olivier (Coleoptera: Curculionidae), also known as the banana pseudostem weevil (BSW), is one of the main pests in banana (Musa paradisiaca L.) plantations in South East Asia and all the banana-growing belts of India1 . The female BSW punctures the outer leaf sheath of the pseudostem and lays eggs inside the sheath. The emerging larvae feed on the soft tissue of the pseudostem and make extensive tunnels ranging up to 8–10 cm depth until pupation. Extensive infestations of BSW make the pseudostem weak and thus reduce the rate of flowering of the plant and finally result in undersized fruiting or no fruiting at all1 . It has been estimated that the stem weevil causes 10–90% yield loss depending on the infestation stage and management efficiency. Adult weevils, though scanty feeders, live up to 200 days and often show the tendency to remain in the pseudostem, but exhibit strong flight activity when they move from one host plant to another. The biology, ecology and chemical control of BSW has been previously studied in detail2 . Because of the long lifespan of adults and endophytic behaviour of the larvae, conventional methods of control, especially chemical control using insecticides proved to be less effective. Additionally, insecticides can be harmful to non-target species and the residues may pollute the environment. Hence, it is necessary to develop alternative control methods that are safe for the environment and highly efficient for the management of O. longicollis. |
| Type(s) of content: | Research Paper |
| Language: | English |
| Name of Journal: | Current Science |
| NAAS Rating: | 6.73 |
| Volume No.: | 94(7) |
| Page Number: | 896-900 |
| Name of the Division/Regional Station: | Entomology |
| Source, DOI or any other URL: | http://connection.ebscohost.com/c/articles/31804502/olfactory-responses-banana-pseudostem-weevil-odoiporus-longicollis-olivier-coleoptera-curculionidae-semiochemicals-from-conspecifics-host-plant |
| URI: | http://krishi.icar.gov.in/jspui/handle/123456789/2489 |
| Appears in Collections: | HS-NRCB-Publication |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Olfactory_responses_of_banana_pseudostem_weevil_Od.pdf | 200.88 kB | Adobe PDF | View/Open |
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