- Title
- Risk assessment to interpret the physiological host range of Hydrellia egeriae, a biocontrol agent for Egeria densa
- Creator
- Smith, Rosalie, Mangan, Rosie, Coetzee, Julie A
- Subject
- To be catalogued
- Date
- 2019
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/418053
- Identifier
- vital:71504
- Identifier
- xlink:href="https://doi.org/10.1007/s10526-019-09942-4"
- Description
- Egeria densa Planchon (Hydrocharitaceae) is a submerged macrophyte native to South America. It forms part of a new suite of invasive aquatic plants that has benefited from open nutrient-rich freshwater systems following the successful biological control of floating aquatic plants in South Africa. The specificity of the leaf-mining fly, Hydrellia egeriae Rodrigues (Diptera: Ephydridae) was tested, using traditional laboratory host-specificity testing (i.e., no-choice and paired choice). Only one non-target species, Lagarosiphon major Deeming (Hydrocharitaceae) supported larval development during pair-choice tests. In order to avoid the rejection of a safe and potentially effective agent, continuation (i.e., multiple generations) tests were conducted to measure the ability of the non-target species to nutritionally support a population indefinitely. None of these species could sustain a viable agent population for more than three generations. Laboratory host-specificity tests are limited as they exempt certain insect-host behaviours. To enhance the interpretation of host-specificity results, a risk assessment was conducted using agent preference (i.e., choice tests) and performance (i.e., choice and continuation tests) results. The feeding and reproductive risk that H. egeriae poses to non-target species is below 2%. Based on these findings, permission for its release in South Africa has been obtained.
- Format
- computer, online resource, application/pdf, 1 online resource (10 pages), pdf
- Publisher
- SpringerLink
- Language
- English
- Relation
- BioControl, Smith, R., Mangan, R. and Coetzee, J.A., 2019. Risk assessment to interpret the physiological host range of Hydrellia egeriae, a biocontrol agent for Egeria densa. BioControl, 64, pp.447-456, BioControl volume 64 p. 447 2019 1573-8248
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the SpringerLink Terms of Use Statement ( https://link.springer.com/termsandconditions)
- Rights
- Closed Access
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Collections
Coetzee, Julie A (Prof)
RU DST/NRF SARChI for Insects in Sustainable Agricultural Ecosystems
RU Department of Botany
SDG 15. Life On Land
RU Department of Zoology and Entomology
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details | SOURCE1 | Risk assessment to interpret the physiological host range of Hydrellia egeriae, a biocontrol agent for Egeria densa.pdf | 693 KB | Adobe Acrobat PDF | View Details |