In crawlspaces

target invasive plant growth with Glyphosate 4+ Herbicide

Preferably

Hexygon DF Miticide Insecticide kills and continues to prevent mite infestations

sunflower and ragweed

VELPAR L VU Weed Control Herbicide Roaches In crawlspacesHow Velpar L VU Herbicide Works Velpar L VU Herbicide contains hexazinone, an organic compound that inhibits photosynthesis. It treats many weed species and provides an effective solution for targeting alfalfa and other weed growth. This nonselective liquid herbicide offers excellent uptake and destroys weeds as they develop. It kills both young and adult weeds and gives you a way to pretreat sites before they take control. Where to Use Velpar L VU