Watch out, Louisiana: weeds to keep an eye on
At a recent Syngenta South Delta crop tour in Alexandria, La., participating retailers and consultants learned about potentially dangerous effects of weed resistance and ways to avoid it. As one of the tour presenters, I cautioned participants that though it may not be an impossible issue for the area now, weed resistance has the potential to become one in the near future. Johnsongrass resistance is already becoming a major concern; there currently are 1.2 million crop acres infested with johnsongrass in the state of Louisiana, and glyphosate is not controlling it. Ryegrass is another one I urged participants to watch out for in the area.
As I've written before, the main causes of resistance include cutting rates, improper timing of application, and repeated use of the same herbicide. I reminded tour participants that overlapping weed control options, rotating modes of action and crops, and using full rates are all excellent ways to prevent resistance. Syngenta has some great tools to assist in the resistance management battle, including Dual Magnum® and Prefix®. Dual Magnum works really well on ryegrass when applied in the fall, and Prefix is a great option for controlling broadleaf weeds and grasses.
A few of my colleagues also spoke during the tour about ways to control resistance issues in soybeans and cotton. To hear segments of these presentations and to read more about the topics covered during the recent Syngenta crop tour, visit deltafarmpress.com/syngentasfctour/.
Caption: Participants take part in a recent Syngenta South Delta crop tour in Alexandria, La.
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