Section 4: Mowing and Herbicide ApplicationAnchor: #i1002817
Need for Coordination
Overspray herbicide applications must be coordinated with mowing operations to:
- ensure effective control of target plant species
- avoid damage to desirable plant species such as wildflowers, legumes and forbs beneficial to wildlife (examples include Illinois bundleflower, Engelmann daisy, Plains Coreopsis, Texas Bluebonnet, etc.).
How Overspray Herbicide Works
Overspray herbicide applications target noxious weeds. For the herbicide to be effective, both of the following conditions must be met:
- The target species must be in a correct growing condition. (See Herbicide Operations.)
- The herbicide must have about 14 days to translocate from the leaf surface to the root system of the target species.
To coordinate mowing and herbicide operations, observe the following guidelines:
- Do not apply overspray herbicide after a mowing operation or before the target species attains a correct growing condition. (To do so would be ineffective and cause damage to desirable species.)
- Allow a minimum of 14 days before mowing in overspray areas.
Details on herbicides are covered fully in Herbicide Operations and also available in separate published form from MNT, Vegetation Management Section.