Weed Control in New Alfalfa Seedings
Early planted new seedings should be scouted for annual broadleaf weeds.
The risk of injury to alfalfa seedlings is greatly increased when 2,4-DB
application is made outside of the first to the third trifoliate stage
window. Note in Publication
75, Guide To Weed Control has the incorrect product rate for 2,4-DB
applied to underseeded cereals. The correct product rate is 0.7 to 0.9
L/ac when the formulation is 625 g/L. Field experience has demonstrated
that reducing the rate of herbicide can reduce the risk of injury to alfalfa
seedlings while providing acceptable suppression or control of weed seedlings.
