BUENOS AIRES (Dow Jones Newswires, September 26 2007): Glyphosate-resistant weeds have spread throughout much of Argentina's Pampas, threatening to drive up the cost of growing soybeans and other crops genetically modified for resistance to the herbicide, Daniel Ploper, plant pathologist for the national food and animal health inspection service, or Senasa, in Tucuman Province said Wednesday.
"Isolated cases have been confirmed in Salta, Tucuman, Corrientes, Santiago del Estero, Cordoba and Santa Fe provinces," Ploper said. The glyphosate-resistant weed, known as sorghum halepense, or "Johnson Grass," had previously been confirmed only in Salta and Tucuman provinces.
The government has launched a number of projects to control the spread of the weed, including the use of herbicides other than glyphosate and attempting to mandate cleaning of harvest machinery to prevent spreading the weed between fields, Ploper said.