How to evaluate the environmental safety of microbial plant protection products: A proposal
2007
Mensink, B.J.W.G. | Scheepmaker, J.W.A.
Plant protection products with active micro-organisms are allegedly less hazardous to the environment and wildlife than synthetic chemical pesticides. Nevertheless, they need a proper pre-marketing environmental safety evaluation because of their potential toxicity and pathogenicity. Scientific and technical guidance on such a safety evaluation for regulatory purposes is scarce. Therefore, a risk decision tree is proposed to provide such guidance and to discern the acceptable from the unacceptable environmental risks. The decision tree is based on the risk criteria of the European Union. It takes integrally into account the characterisation, identification and efficacy and also emission, exposure, environmental effects and, finally, the environmental risk assessment. Case by case expert judgement remains necessary in view of limited knowledge of microbial ecology, limited experience with regulatory test protocols and taxonomic difficulties in relation to the indigenousness of active micro-organisms. The decision tree offers regulatory guidance on the environmental safety evaluation of microbial plant protection products.
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