Movement of the parasitic nematode Phasmarhabditis hermaphrodita in the presence of mucus from the host slug Deroceras reticulatum

Hapca, S., Crawford, J. , Rae, R., Wilson, M. and Young, I. M. (2007) Movement of the parasitic nematode Phasmarhabditis hermaphrodita in the presence of mucus from the host slug Deroceras reticulatum. Biological Control, 41(2), pp. 223-229. (doi: 10.1016/j.biocontrol.2007.01.005)

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Abstract

Phasmarhabditis hermaphrodita is a parasitic nematode capable of killing several species of slugs including Deroceras reticulatum, the most widespread slug pest in the world. This nematode can control slug infestations in a wide range of crops such as wheat, lettuce and strawberries. Optimization of this biocontrol agent depends on a proper understanding of the interaction between the host and parasite. In this paper, we investigate the response of P. hermaphrodita to the presence of slug mucus on plates of agar. We define an attraction index and find that the nematodes are significantly attracted by filter paper impregnated with slug mucus compared to paper impregnated with water. Second, nematode trails were recorded on a homogeneous layer of technical agar, with or without the presence of the slug mucus. Mucus was applied in two treatments comprising localization on a piece of filter paper and a uniform distribution across the plate. The different mucus treatments induced significantly different effects on the speed of nematode movement and the distribution of the turning angles, as well as the fractal dimension of nematode foraging trail. These results are consistent with the hypothesis that the nematodes exhibit both a chemotactic and chemokinetic response to a signal emanating from slug mucus.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Crawford, Professor John
Authors: Hapca, S., Crawford, J., Rae, R., Wilson, M., and Young, I. M.
College/School:College of Social Sciences > Adam Smith Business School > Management
Journal Name:Biological Control
Publisher:Elsevier
ISSN:1049-9644
ISSN (Online):1090-2112
Published Online:20 January 2007

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