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Organic pesticides not always 'greener' choice, study finds
Date:6/24/2010

flower bugs -- unharmed.

"We found the mineral oil organic pesticide had the most impact on the environment because it works by smothering the aphids and therefore requires large amounts to be applied to the plants," said Hallett.

Compared to the synthetic pesticides, the mineral oil-based and fungal products were less effective, as they also killed ladybugs and flower bugs, which are important regulators of aphid population and growth.

These predator insects reduce environmental impact because they naturally protect the crop, reducing the amount of pesticides that are needed, she added.

"Ultimately, the organic products were much less effective than the novel and conventional pesticides at killing the aphids and they have a potentially higher environmental impact," she said. "In terms of making pest management decisions and trying to do what is best for the environment, it's important to look at every compound and make a selection based on the environmental impact quotient rather than if it's simply natural or synthetic. It's a simplification that just doesn't work when it comes to minimizing environmental impact."


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Contact: Deirdre Healey
d.healey@exec.uoguelph.ca
519-824-4120
University of Guelph
Source:Eurekalert

Page: 1 2

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