US grower perceptions and experiences with glyphosate-resistant weeds.
BACKGROUND
A survey of 400 growers of maize, soybeans and cotton was made in the United States to determine perceptions, experiences and management practices with glyphosate-resistant weeds. The survey included growers in the north (corn belt) and south (cotton belt) of the USA in spring 2006.


RESULTS
Interestingly, 24 and 39% of northern and southern growers, respectively, assumed they had glyphosate weed resistance on their farm. Of the 200 southern growers interviewed, 67% had planted continuous glyphosate-resistant (GR) crops for a period of 3-5 years. According to the survey respondents, the key method for managing glyphosate-resistant weeds was to rotate to other herbicides.


CONCLUSIONS
Growers do value GR crop technology but are adopting measures to manage resistance only as needed.
Foresman
Chuck
C
Syngenta Crop Protection, Inc., Greensboro, NC 27419, USA. chuck.foresman@Syngenta.com
Glasgow
Les
L
D000383:Agriculture; D001290:Attitude; D001364:Awareness; D005998:Glycine / Q000031:analogs & derivatives*; D053209:Herbicide Resistance; D006540:Herbicides; D007407:Interviews as Topic; D010465:Perception; D010944:Plants; D030821:Plants, Genetically Modified; D014481:United States; D000097797:Glyphosate
D005998:Glycine; D006540:Herbicides; D000097797:Glyphosate