Journal article

Effect of remnant vegetation, pesticides, and farm management on abundance of the beneficial predator Notonomus gravis (Chaudoir) (Coleoptera : Carabidae)

Michael A Nash, Linda J Thomson, Ary A Hoffmann

Biological Control | ACADEMIC PRESS INC ELSEVIER SCIENCE | Published : 2008

Abstract

Carabid beetles are central to the biological control of arable crop pests, in particular slugs. We evaluate three ways of potentially promoting predator numbers: providing conservation strips adjacent to farmland, reducing the number of deleterious chemical sprays and changing tillage practices. In providing growers with management guidelines we also introduce a simple insecticide metric, based on IOBC toxicity ratings, and application number, to assess the biological impacts of agro-chemical usage. Sampling across 20 western Victorian properties, along transects from adjacent remnant grasslands 200 m into arable fields, was seasonally (February and March) biased to the dominant carabid spe..

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