Is there anything that will kill bindweed? Perhaps something that you paint onto the leaves, as I presume weedkiller would kill the plants the bindweed is attacking? My garden appears to be overrun with the stuff. Thanks for any advice offered.
Use boiling water to kill bindweed, simply boil some water and pour it on the bindweed. If possible, pour the boiling water about 2-3′ beyond where the bindweed is growing so that you can get as much of the roots as possible.
You can buy spot treatments and apply to individual leaves but for heavy infestation like you seem to have, it may be impractical.
Alternatively loosen the soil surface with a fork and pull out the white stringy roots that grow laterally below the surface.
Well in my garden it would be impossible to separate it enough to be able to pour boiling water, bleach or anything else on it without destroying other plants. Unfortunately I think it's one of those things you have to relentlessly pull up.
If you don’t have pets, paint glyphosate or glyphosate gel on as many leaves as you can and then be very patient. The commonest cause of glyphosate failing to work is because the user cuts down the top growth too soon and thus saves the roots from being poisoned. I have great success with it on brambles and nettles by leaving the topgrowth alone for months. It looks ugly but it does work and minimises the amount you need to use.