Common chickweed (Stellaria media) that is resistant to Group 2, or ALS-inhibiting herbicides, is on the increase in certain areas of the U.S., and can be a considerable problem in wheat production.
The evolution and widespread distribution of herbicide-resistant weeds and their management is a challenge for crop producers and land managers. The evolution of herbicide-resistant weeds is not new. The first report dates back to 1970, when common groundsel (Senecio vulgaris) resistant to atrazine was confirmed in Washington. Recently, multiple-resistance was confirmed in Palmer amaranth (Amaranthus palmeri) in a continuous seed corn production field in Nebraska.
Fall armyworms and corn borers have long been a concern for Louisiana corn growers. While farmers in the U.S. have planted transgenic Bt corn varieties since the 1990s to biologically control pests, staying ahead of their ability to develop resistance is a constant battle.
Controlling large weeds: Do you feel lucky? (07/17/14)
Screening waterhemp for herbicide resistance (06/26/14)
Update on herbicide resistance in waterhemp (05/11/12)
Soil an overlooked resource (04/18/11)
Afternoon Comments 10/22
Wednesday’s soy reversal weighed on corn futures. The corn market seemed to power higher today, especially with the soy complex leading the way higher. However, bullish bean traders couldn’t sustain early gains, with the reversal sending a decidedly bearish technical signal as well. That apparently spurred bullish profit-taking in corn. December corn futures settled 3.0 cents lower at $3.53/bushel Wednesday afternoon, while May sagged 2.5 to $3.76.