The last few weeks, we’ve been looking at both grass and broadleaf pasture weeds. These are both fields that are cut for hay. In some fields, we are seeing grasses right now, such as crabgrass, vasseygrass and broadleaf signalgrass. Below is a photo of broadleaf signalgrass, which is a summer annual, wide-bladed grass. This is a weed that is we’d like to control with pre-emergent herbicides, although a few post-emergent herbicides have selectivity for these grass weeds. The selective herbicides are known to yellow Bermuda pastures, and there are certain precautions we can take to reduce yield.
In another pasture, we looked at a few broadleaf weeds, one being maypop passionflower. This is a perennial vine that grows along roadsides, fields and pastures. These flowers are just opening, but the petals will be bluish to white with green or yellow berry. The leaves are alternate with 3 lobes. In this pasture, we’ll have options of post-emergent herbicides that have activity on this weed.
For any of these type of summer pasture weeds, discuss control options with your Extension Agent.