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)
Morning Comments 10/31
The corn rally has stalled. Disappointing results on the weekly Export Sales report seemed to bring the recent corn rally to a grinding halt. Bulls now seemingly face increased resistance, as evidenced by the lack of strength exhibited overnight, despite across-the-board soy gains. We probably shouldn’t be surprised if long liquidation dominates today’s trading. December corn futures stalled at $3.7425/bushel early Friday morning, while May lost 0.25 to $3.955.