Crop Biotech Update

Technical Support Against Glyphosate Resistant Weeds

October 14, 2011

The International Survey of Herbicide Resistant Weeds have reported that the number of weed species with reported glyphosate resistant population has reached almost 20 worlwide and 12 in the US. Weed species found to have glyphosate resistant populations in the US include common waterhemp, giant ragweed, common ragweed, kochia, palmer, amaranth, marestail, hairy fleabane, jungle rice, goose grass, Johsongrass, Italian ryegrass, and annual bluegrass. This occurrence is due to repeated use of glyphosate over a large area, which in the US, is already more than 300 million acres.

There is thus a need for everyone to make weed management decisions that adopt more diversified approach to weed control. Properly using herbicide tolerant crop technologies as a component of an integrated weed management program was advised by the article to be the key to preserving the long-term benefits of these technologies, while avoiding many of the concerns associated with their use or misuse.

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