NOTE: The paper, "Gene amplification confers glyphosate resistance in Amaranthus palmeri [Palmer pigweed]", is available here: http://www.pnas.org/content/early/2009/12/10/0906649107.
---
---
GM cotton crops in US useless
By Will Ockenden
ABC, 12 January 2010
http://www.abc.net.au/rural/sa/content/2010/01/s2790653.htm

Genetically modified cotton crops in the United States are becoming useless, as weeds evolve a resistance to the herbicide glyphosate.

In the southern cotton crops, mutant weeds are becoming so bad mechanical harvesters are being damaged, and weed control must be done by hand.

A scientific study has found that the herbicide resistant weed population could threaten GM crop technology.

The study was published in the Proceedings of the National Academy of Sciences journal.

In this report: Dr Todd Gains, study's lead author, University of Western Australia