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Lookup NU author(s): Ingo Schuder,
Dr Gordon Port
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The dose-dependent responses of the slug Deroceras panormitanum and the snail Oxyloma pfeifferi were tested with three novel molluscicides: cinnamamide, copper ammonium carbonate and ureaformaldehyde. Solutions of products were used at concentrations ranging from 0.005% to 1% (active ingredients: 0.05-149μg/cm2). In a bioassay, antifeedant effects, mortality, repellence and irritation were investigated. Both species were significantly repelled by cinnamamide and a ureaformaldehyde resin at concentrations of 0.5% and 1%, causing a barrier effect. A significant antifeedant effect on D. panormitanum was also seen with those dose-treatment combinations, whereas only Croptex-Fungex® at 0.5% and 0.625% had a significant antifeedant effect on O. pfeifferi. In comparison to the untreated compost, the accumulated leaf damage on treated compost was significantly reduced by all three products at concentrations of 0.5% and above. The behavioural software EthoVision was used for an automated analysis of the behavioural response of D. panormitanum to the irritant effect. All dose-treatment combinations of 0.1% and above significantly reduced the moving activity of the slug, accompanied by severe weight loss and significant increases in mortality with cinnamamide and a ureaformaldehyde resin at 0.5% and 1%. Egg development was completely suppressed at concentrations as low as 0.05%. Significant delays in egg development time were observed with all three molluscicides at concentrations as low as 0.005%. The implications for an integrated control strategy of these pest species are discussed. © 2004 Elsevier Ltd. All rights reserved.
Author(s): Schuder I, Port G, Bennison J
Publication type: Article
Publication status: Published
Journal: Crop Protection
ISSN (print): 0261-2194
ISSN (electronic): 1873-6904
Publisher: Elsevier BV
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