Invasive root/fungi throughout my flower gardens. #833448

Asked June 02, 2023, 7:06 PM EDT

Many of my perennials and shrubs did not make it through the winter. I have found these very bright (almost fluorescent) stringy roots throughout my mulch and soil. They appear to be very invasive and I think it may be what has killed off many of my plants/flowers. I can not find anything like them on the internet. I believe it possibly came from bad mulch. Can you identify this? Harmful? How do I get rid of it?

Washington County Minnesota

Expert Response
It might be dodder and the first clue is that it is devilishly hard to be rid of it. However it may be roots from trees or shrubs that took advantage of the loose, compost texture of the mulch. Some look like they have tiny white roots emerging from older tougher strings. Feeder or surface roots look like those in the picture too. 
Claire Kari Replied June 02, 2023, 9:53 PM EDT

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