Broadleaf Weed Control In Alfalfa

Group 15 received a 24 c supplemental label for use in seedling 4 alfalfa trifoliates and established alfalfa can be applied after spring green up to provide residual control of annual grasses and broadleaf weeds at a rate of 1 25 to 2 quarts a.

Broadleaf weed control in alfalfa.

When weeds especially broadleaf weeds threaten seedling alfalfa mowing is often used for control. Roundup ready alfalfa seed quantities limited initially. Increasing the height when mowing can be a good strategy as well. Postemergence to weeds roundup ready alfalfa tolerant at all growth stages.

To control these weeds a post emergence selective herbicide may be used. Remove domestic livestock before application and wait. 2 4 db trade names butoxone butyrac alone or mixed with bromoxynil trade name buctril are two herbicides that have shown promise in controlling small broadleaf weeds. Post control options for conventional alfalfa.

For newly seeded alfalfa stands mowing can be good a control option for broadleaf weeds. Add ams at 8 5 to 17 lb 100 gallons of spray solution. Sethoxydim trade name poast may be used to control grass weeds. This can slow the growth of broadleaf weeds while allowing the alfalfa seedlings to re grow with reduced weed competition.

Include a crop oil concentrate in the spray mixture. Do not use on mixed stands. It will not control weeds that have germinated so tank mix with. Up to 44 oz a roundup original max or weathermax in a single application not to exceed a total 132 oz a for in crop treatments per year.

Adjust mowing height so several leaves remain on alfalfa seedlings after clipping to help. May be tank mixed with pursuit buctril or 2 4 db for broadleaf weed control.