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Abstract

The entry of malathion into the aquatic environment is mainly through direct applications to control pest and vector insects, or through indirect sources resulting from treatments of insect pests in agro- or silva-ecosystems. Malathion has a very short life in water (1 week) and, being unstable and rapidly metabolized in algae, does not possess any great potential for biomagnification. This compound, when used at field application rates (up to 500 g/ha), has a low level of toxicity to molluscs and annelids. Crustaceans, non-target insects and fish show relatively high sensitivities to malathion. On the contrary it appears to offer a considerable margin of safety to several species of birds, especially mallard ducks and pheasants. The effect concentration data reviewed in the present study indicate that a limit of 1 mug/l for freshwater environments could be suggested as being necessary to protect aquatic life.

Additional information

Authors: PREMAZZI G JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: EUROPEAN APPLIED RESEARCH REPORTS + ENVIRONMENT AND NATURAL RESOURCES SECTION, VOL. 2 (1984), NO. 2, PP. 221- 292, (EUR 8677 EN).
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