Abstract
Rhabditid nematodes are invertebrates that introduce pathogenic bacteria to the insects and molluscs they parasitise. Marketed as biopesticides, they provide safe and effective alternatives to chemical pesticides in several important sectors of horticulture. In Great Britain, the introduction of non-indigenous species of nematodes is strictly controlled, as is the contained use and deliberate release of genetically modified nematodes and their bacterial symbionts. Currently, indigenous, unmodified nematodes do not have to be registered for use as biopesticides in the UK, but in some other European countries registration is mandatory. The European Commission is seeking to harmonize procedures for the authorization of plant protection products, including rhabditid nematodes, under the provisions of Council Directive 91/414/EEC.

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