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Herbicide-Resistant 'Super Weeds' Increasingly Plaguing Farmers U.S. News and World Report.

Published byMelvin Shaw Modified over 9 years ago

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Presentation on theme: "Herbicide-Resistant 'Super Weeds' Increasingly Plaguing Farmers U.S. News and World Report."— Presentation transcript:

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3 Herbicide-Resistant 'Super Weeds' Increasingly Plaguing Farmers U.S. News and World Report

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9 Culpepper: Macon Co., GA, 2007 Weathermax 88 oz Staple LX 10 oz

10 Johnston Co. susceptible Stanley Co. Union Co. Edgecombe Co. susceptible Glyphosate rates, left to right, where 1X = 860 g/ha or 21.8 fl oz PowerMax (Roundup) 0.063X, 0.125X, 0.25X, 0.5X, 1X, 2X, 4X, 8X 1X 8X Dec. 2009

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15 Antibiotic Resistance

16 Take Home Message  Superweeds = resistant weeds  Weed resistance happened before Genetic Engineering.  Weed resistance is a result of overreliance on one pesticide, it really has nothing to do with genetic engineering  Weed resistance is a result of overreliance on one pesticide, it really has nothing to do with genetic engineering.

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