I do the same as you Farmergeddun. Unfortunately some always seems to survive to
live another day in the following year. I hate using weedkiller especially in my veggie patch.
If I treat it when do ou pull it up or do ou dig up ??
I can't answer your Q Suzy but does bindweed die back in winter leaving thin dead vines on tree's? I might have bindweed on an allotment just aquired.
I'm sure someone will be along soon to answer your Q, hopefully they'll be able to answer mine too...
Bindweed does die back in winter leaving thin string all over what it climbed up.
Treat it in growing season with Glyphosate, not easy when it's all over everything! Then when it's dead, which may take a few goes, pull off the dead strings.
Would roundup be effective, I try to be as organic as I can and roundup was going to be an absolute last resort on two tree stumps at the bottom of the plot but their roots are alive and growing despite being cut down.
the active ingredient in Roundup is glysophate so it will be good against bindweed when the weed is growing. Not so sure it will kill tree stumps though.
The trick with glyphosate is that after you've sprayed you must wait for the foliage to go brown and begin to wither before you pull it up - it may take a couple of weeks or more - only then will the glyphosate have travelled down to the roots and killed them - if you pull the weeds up too soon the roots will still be alive and will grow again
I'm with everyone on the Glyphosate route. I let it grow up canes so it's all in one place and there's plenty of foliage to treat, and either use the gel, or wear a pair of marigolds , then on top, a pair of cheap cotton gloves, then put the weedkiller into a bucket , dip your hands in and squash the foliage around the canes. MUST wear waterproof gloves under the cotton though, and make sure they're not dripping wet.