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Poison Information Center Toll Free Lines: 0800 – 730030 and 0800 – 720021

Fact Sheet – Herbicide Resistance Management

Herbicides allow farmers to control weeds and preserve their crop’s yield and quality. If farmers rely too heavily on one type of herbicide, however, weeds can naturally adapt and become resistant. In fact, roughly 250 weed species have evolved to resist 160 different herbicides over the past 60 years.

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