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Cattle Boards
Grasses, Pastures & Hay
New seeding into Knappweed infested field?
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<blockquote data-quote="hayray" data-source="post: 635121" data-attributes="member: 3046"><p>There are some herbicides but they usually are only effective during the seeding stages of weeds. I know there are some herbicides you can spray in the fall like Velpar but that has high crop damage and is expensive. I have used Raptor on new seedings and that worked good and I know you can use Eptam pre-emerge and incorporated. I don't know if those will work on knappweed and Raptor is really expensive to use. The efficacy of any of those herbicides is also pretty minimal most of the time. I have spayed glyphosate and went in and no-tilled alfalfa and had the knappweed come right back. Not sure if it came back from the roots or it was from the seeds. I am worried about the seeds coming back. And that has been the problem with herbicides on alfalfa, a lot of restrictions of effectiveness such as growth stages of alfalfa and weeds otherwise nothing works.</p></blockquote><p></p>
[QUOTE="hayray, post: 635121, member: 3046"] There are some herbicides but they usually are only effective during the seeding stages of weeds. I know there are some herbicides you can spray in the fall like Velpar but that has high crop damage and is expensive. I have used Raptor on new seedings and that worked good and I know you can use Eptam pre-emerge and incorporated. I don't know if those will work on knappweed and Raptor is really expensive to use. The efficacy of any of those herbicides is also pretty minimal most of the time. I have spayed glyphosate and went in and no-tilled alfalfa and had the knappweed come right back. Not sure if it came back from the roots or it was from the seeds. I am worried about the seeds coming back. And that has been the problem with herbicides on alfalfa, a lot of restrictions of effectiveness such as growth stages of alfalfa and weeds otherwise nothing works. [/QUOTE]
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New seeding into Knappweed infested field?
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