Insecticides poison all insects

Posted by Christine, August 8, 2015

McGill University research shows more effects of insecticides:

Insecticides that are sprayed in orchards and fields across North America may be more toxic to spiders than scientists previously believed.

A McGill research team reached this conclusion after looking at changes in the behaviour of individual Bronze Jumping Spiders both before and after exposure to Phosmet, a widely used broad spectrum insecticide. It is a finding with far-reaching implications for agricultural production and ecosystem health.

“Bronze jumping spiders play an important role in orchards and fields, especially at the beginning of the agricultural season, by eating many of the pests like the oblique-banded leafroller, a moth that attacks young plants and fruit,” says Raphaël Royauté, a former McGill PhD student whose study on the subject was published in Functional Ecology recently. “Farmers spray insecticides on the plants to get rid of these same pests, and it was thought that it had little significant effect on the spiders’ behaviours. But we now know that this isn’t the case.”

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