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New improvements on pesticide ecological risk assessment on the soil-water interface
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Resumo(s)
Improving knowledge to evaluate and reduce pesticide impacts in the environment is a
present concern to achieve their sustainable use. With the aim of increasing ecological
relevance on the environmental risk assessment of pesticides (ERA), an integrated
approach was undertaken linking pesticide fate and effects on aquatic and terrestrial
non-target organisms under irrigated crop-based scenarios in Mediterranean realistic
conditions, for which there is a lack of studies. Pesticides fate and effects were assessed
by adopting an innovative approach embracing different levels of ERA complexity: a
refined first-tier with the use of natural soil in ecotoxicological testing, instead of the
conventional artificial soil; a refined higher-tier level performing simulations of cropbased
agricultural scenarios of maize, potato and onion crops, with the application of
the fungicides azoxystrobin and chlorothalonil and the insecticide ethoprophos, using a
new semi-field methodology; and an higher tier field study incorporating biological
interactions and dynamics of soil fauna communities and environmental factors that
determine the effects of pesticides in the field under realistic agricultural practices. This
study will increase the knowledge on ecological risks of pesticides under field situations
improving decision making towards a sustainable use of pesticides and ecological
protection
Descrição
Doutoramento em Engenharia Agronómica - Instituto Superior de Agronomia
Palavras-chave
Mediterranean conditions natural soil ERA pesticides crop-based scenarios aquatic-terrestrial ecotoxicology
Contexto Educativo
Citação
Leitão, S.P.A.S. - New improvements on pesticide ecological risk assessment on the soil-water interface. Lisboa: ISA, 2013, 229 p.