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The effectiveness of exclusion barriers for polyphagous predatory arthropods in wheat

Published online by Cambridge University Press:  10 July 2009

J.M. Holland
J.M. Holland*
Affiliation:
The Game Conservancy Trust, Fordingbridge, Hampshire, SP6 1EF, UK
*
*Fax: 01425 651026 E-mail: john.holland2@ukonline.co.uk
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Abstract

Vertical polythene exclusion barriers combined with trapping out using pitfall traps have been used to create enclosures within which arthropod numbers can be manipulated. This technique has been primarily used to investigate the impact of ground-dwelling polyphagous arthropods on cereal pests. Arthropod numbers in a total of 42 enclosed areas were compared to adjacent unenclosed areas over three years in Hampshire, UK. A range of arthropod monitoring techniques was used, including pitfall traps, fenced pitfall traps and D-vac suction samples. The enclosures were effective in reducing most species of Carabidae, Linyphiidae and Lycosidae encountered and numbers in pitfall traps were reduced by an average of 74%, 62% and 77% respectively. Similar reductions in densities of these taxa were found. Staphylinidae were less effected with an average reduction of only 32% in pitfall traps, although Philonthus species were reduced by 82%. Results were compared to previous studies.

Type
Review Article
Information
Bulletin of Entomological Research , Volume 88 , Issue 3 , June 1998 , pp. 305 - 310
Copyright
Copyright © Cambridge University Press 1998

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