Bindweed is very resistant to herbicides.
The mites are supposed to travel to the growing bindweed. They'll create galls and will effect the flowers, which will mean seeds won't be produced. Once we see that the weeds in our yard and pasture are infected, we can mow the patches and that will spread the mites. We can also take infected pieces and move them to non-infected areas. In the winter, the mites will move down into the crown and reproduce, making new baby microscopic mites that will continue to infect our weeds. I'll let you know how it works!