The growing problem of pesticide resistance

An image showing a diseased leaf

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Weeds and other plant pests can no longer be controlled by chemicals as easily as they could. Bárbara Pinho talks to the scientists finding solutions

Pesticides have a long history, from Bordeaux mixture to DDT and glyphosate/Roundup. But as bacteria are becoming resistant to antimicrobial drugs, so are crop pests developing resistance to pesticides.