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Plant phylogeny determines host selection and acceptance of the oligophagous leaf beetle Cassida rubiginosa.
Hettiarachchi, Dilani K; Rostás, Michael; Sullivan, Jon J; Jackman, Sarah; van Koten, Chikako; Cripps, Michael G.
Afiliación
  • Hettiarachchi DK; Bio-Protection Research Centre, Lincoln University, Lincoln, New Zealand.
  • Rostás M; Department of Biological Sciences, Faculty of Applied Sciences, Rajarata University of Sri Lanka, Mihintale, Sri Lanka.
  • Sullivan JJ; Bio-Protection Research Centre, Lincoln University, Lincoln, New Zealand.
  • Jackman S; Agricultural Entomology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany.
  • van Koten C; Department of Pest Management and Conservation, Lincoln University, Lincoln, New Zealand.
  • Cripps MG; AgResearch Ltd., Lincoln Science Centre, Lincoln, New Zealand.
Pest Manag Sci ; 79(11): 4694-4703, 2023 Nov.
Article en En | MEDLINE | ID: mdl-37450765
ABSTRACT

BACKGROUND:

Predicting the host range of biocontrol agents is important for the safe and effective implementation of biocontrol of weeds. In this study, we examined the phylogenetic pattern of host selection and acceptance by the biocontrol beetle, Cassida rubiginosa. The beetle was released in New Zealand for control of Cirsium arvense, its primary host plant, but has potential to attack many Cardueae (thistles and knapweeds) species. We conducted a series of no-choice and choice experiments and modelled the responses of Cassida rubiginosa in relation to phylogenetic distance from Cirsium arvense.

RESULTS:

The olfactory recognition (single odour) and preference (two odours) of the beetle showed a significant phylogenetic relationship. These relationships showed a high degree of correlation with 66.9% of the variation in olfactory recognition and 82.8% of the variation in olfactory preference explained by phylogeny. Where the beetle could contact plants, under no-choice conditions there was no phylogenetic pattern to host plant acceptance. However, under choice conditions, phylogenetic distance was a strong predictor of feeding and oviposition preference. These relationships showed a high degree of correlation, with 63.4% of the variation in feeding preference, and 89.0% of the variation in oviposition preference, explained by phylogeny.

CONCLUSIONS:

As far as we are aware, this is the first demonstration of an herbivorous insect that exhibits a phylogenetic pattern to olfactory host plant selection. Host plant utilisation by Cassida rubiginosa in New Zealand will be mostly restricted to Cirsium and Carduus species, with minimal potential for impact on other Cardueae weeds. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Pest Manag Sci Asunto de la revista: TOXICOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: Nueva Zelanda

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Pest Manag Sci Asunto de la revista: TOXICOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: Nueva Zelanda