Kentucky Transportation Cabinet crews will begin treating for noxious and nuisance weeds throughout the state this month. The treatments aid in controlling the spread of undesirable plants along state highway rights of way. The cabinet targets Johnsongrass, Giant foxtail, Canada Thistle, Japanese knotweed, and others. Left uncontrolled, noxious weeds can grow so large that they interfere with a driver’s line of vision on highways, as well as damage pavement and clog ditches, causing drainage problems.