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Non Target Arthropod (NTA) recovery: critical review & provision of guidance for interpretation - PS2355

Environmental risk assessments for pesticides under Directive 91/414/EEC cover potential effects on non-target arthropods (NTAs). The potential for within-season recovery of NTA populations and communities following treatment may indicate acceptable risk to arthropods; however, the various available test designs demonstrate the potential for recovery in different ways. Laboratory tests do not provide information on the ability of arthropods to recolonise depleted areas whereas field study results may be closely linked to study design through complex scale-dependent and life history mediated effects. Recovery may thus be demonstrated through a variety of approaches, yet is currently poorly understood.

There is a need for further information on recovery, it's signs (especially in relation to study type) and the mechanisms by which it occurs; aid on interpretation of apparent and actual recovery and guidance on use in risk assessments. In addition, guidance on the design and interpretation of field studies in relation to recovery endpoints would be beneficial.
1. To resolve, as far as possible, the uncertainty surrounding the demonstration and interpretation of recovery of non-target arthropod populations in risk assessments under EC Directive 91/414. Specifically:
a. To conduct a critical review of recovery processes and signs such that guidance on interpretation may be provided.
Project Documents
• Final Report : NTA recovery: critical review & guidance for interpretation   (3041k)
Time-Scale and Cost
From: 2009

To: 2010

Cost: £23,818
Contractor / Funded Organisations
Environmental Effects              
Pest and Weed Control              
Pesticide use              
Plants and Animals              
Fields of Study
Pesticide Safety