unwanted vines on mandevilla plants

in the spring we planted 2 red mandevilla plant to grow on a trellis, with impatients in front. All was going well, then noticed this vine growing thru the mandevilla abd starting ti choke them iut with the tight raping of the vines. this choking vine has no flowers, grows quickly, doesn't appear to be coming out of the ground but more like a parasite vine, it is now all thru the impatients as well, and we're constantly trying to pull it out, not successfully. WHat is it, how kill it?
Submitted by popnnina



Thanks for writing. It sounds like dodder, a parastic plant. Unfortunately, once dodder infects a plant, there's no way to get rid of it. Your best bet is to remove the mandevillas and impatiens before the dodder produces seed. Use a pre-emergence herbicide when you replant to stop any dodder seeds from resprouting.


---Justin, Senior Garden Editor, BHG.com

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