- Title
- Persistence and virulence of promising entomopathogenic fungal isolates for use in citrus orchards in South Africa
- Creator
- Coombes, Candice A, Hill, Martin P, Moore, Sean D, Dames, Joanna F, Fullard, T
- Subject
- To be catalogued
- Date
- 2013
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/416893
- Identifier
- vital:71394
- Identifier
- xlink:href="https://doi.org/10.1080/09583157.2013.819489"
- Description
- Thaumatotibia leucotreta (Meyrick) (1912) (Lepidoptera: Tortricidae) is a key economic pest of citrus in South Africa. Although a variety of control options are available, none currently registered target the soil-dwelling life stages of the pest. Three fungal isolates, two Metarhizium anisopliae sensu lato Metschnikoff (Sorokin) isolates (G 11 3 L6 and FCM Ar 23 B3) and one Beauveria bassiana sensu lato Balsamo (Vuillemin) isolate (G Ar 17 B3) have been identified as showing the greatest potential against T. leucotreta soil-dwelling life stages. Since environmental persistence is an important factor in the success of entomopathogenic fungi against soil pests, the isolates, along with two commercial isolates (B. bassiana Eco-Bb® and M. anisopliae ICIPE 69), were subjected to a six-month field persistence trial. Every month after burial of the fungal isolates, inside net bags, in orchard soil, the number of colony forming units (CFUs) per gram of soil was measured and the viability of the conidia was assessed using bioassays. All isolates investigated were capable of persisting in the soil for the duration of the trial period and in addition, were capable of initiating infection in T. leucotreta late fifth instar larvae and subsequent pupae. However, with the exception of the commercial isolates which showed some correlation, no correlation was found between the number of CFUs recorded and percentage T. leucotreta mycosis. Persistence of entomopathogenic fungi in the field is affected by a series of factors, and although the effect of these factors was not measured, the data have provided preliminary evidence towards the persistence capability of these candidate biopesticides against T. leucotreta.
- Format
- computer, online resource, application/pdf, 1 online resource (14 pages), pdf
- Publisher
- Taylor and Francis Online
- Language
- English
- Relation
- Biocontrol Science and Technology, Coombes, C.A., Hill, M.P., Moore, S.D., Dames, J.F. and Fullard, T., 2013. Persistence and virulence of promising entomopathogenic fungal isolates for use in citrus orchards in South Africa. Biocontrol Science and Technology, 23(9), pp.1053-1066, Biocontrol Science and Technology volume 23 number 9 p. 1053 2013 1360-0478
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Taylor and Francis Online Terms and Conditions Statement (https://www.tandfonline.com/terms-and-conditions)
- Rights
- Closed Access
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Collections
Hill, Martin Patrick (Distinguished Professor)
Dames, Joanna Felicity (Prof)
RU DST/NRF SARChI for Insects in Sustainable Agricultural Ecosystems
Coombes, Candice Anne (Dr)
RU Department of Biochemistry, Microbiology and Bioinformatics
SDG 15. Life On Land
RU Department of Zoology and Entomology
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | SOURCE1 | Persistence and virulence of promising entomopathogenic fungal isolates for use in citrus orchards in South Africa.pdf | 739 KB | Adobe Acrobat PDF | View Details Download |