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)
Midday Report 10/24
Crop traders may be taking profits before the weekend. The grain and soy markets have performed well this week despite generally bearish fundamentals. That latter fact is probably the underlying reason for today’s CBOT slippage, with bullish corn traders taking profits on long positions ahead of the weekend. December corn futures dipped 4.5 cents to $3.5525/bushel late Friday morning, while May lost 4.5 to $3.775.