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Interaction of intrinsic and extrinsic chemical cues in the behaviour of Bursaphelenchus xylophilus (Aphelenchida: Aphelenchoididae) in relation to its beetle vectors

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For more content, see Nematologica.

Bursaphelenchus xylophilus, its host trees and beetle vectors represent an unusual ecological system. The fourth stage, dispersal juvenile (JIV) of B. xylophilus is a specialised life stage that must alter its response to a variety of chemical cues over time to properly enter and exit its beetle vector. Neutral storage (NS) lipid content is proposed as a modifier of nematode response to beetleand tree-produced volatiles. The chemotactic response of JIV to a variety of chemicals was tested and the lipid contents of JIV attracted to particular chemicals were quantified. Nematodes with the lowest NS lipid content were attracted to β-myrcene, a pine volatile, while nematodes with the highest NS lipid content were attracted to toluene, a beetle cuticular hydrocarbon. A rolling fulcrum model of the integration of intrinsic (NS lipid) and extrinsic (volatiles) cues is proposed to explain the behavioural ontogeny of JIV in relation to the beetle vector.

Affiliations: 1: Department of Entomology, University of Missouri, Columbia, MO 65211, USA

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/content/journals/10.1163/156854101317020213
2001-09-01
2016-12-06

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