– Mark Loux, OSU Extension Weed Specialist
Fall is a perfect time to scout for AND control cressleaf groundsel and most other biennial weeds of concern.
The next month and a half or so is an ideal time to control a number of weeds that cause problems in hayfields and pastures, and also certain weeds in fencerows and other areas adjacent to fields. We discussed scouting and fall control of cressleaf groundsel in a C.O.R.N. article last fall, to avoid problems with the toxicity of this weed in hay next year. Many of these weeds are most problematic in new hay and forage seedings, since the crop may not yet be dense enough to suppress them without the help of herbicides. A number of winter annuals fit into this category – mustards, marestail, pennycress, chickweed. For biennials such as wild carrot, poision hemlock, burdock, and teasel, the low growing plant after the first year of growth, which is present now, is more susceptible to control with herbicides compared with plants with elongated stems in spring. And it’s certainly a good time to go after dandelion, Canada thistle, and curly dock.
Fall herbicide options for grass hay and pastures, and non-crop areas, are considerably greater in number and often also effectiveness than those labeled for use in a first-year legume or legume/grass stand. For example . . .
Continue reading Scout Now For Cressleaf Groundsel And Other Winter Weeds In Hayfields And Pastures