Kreg from Houston, Texas writes
Crossbow Specialty Herbicide - 2, 4-D & Triclopyr is not labeled for grassy weeds like Johnsongrass, but for brushy type weeds. We would recommend using a product like TVC Total Vegetation Control. TVC is labeled for grassy weeds like Johnson grass. Please be aware this is a vegetation mgmt product and will kill any grass you apply it to. Using a surfactant will always help the herbicide to adhere to weed leaves with some herbicides but the Crossbow product label only mentions adding a surfactant for certain situations when tank mixing with liquid nitrogen, so in general one is not added.
Answer last updated on: 04/09/2014