use ortho brush and poison ivy killer straight, with paint brush around the outside circumference of the top of tree stumps. It is 8% triclopyr(a salt similar to glyphosate). It will kill any stump dead. I have killed hundreds of sweet gums and tallows in and around my pond.
ML, I have read that and other articles about roundup in particular. It is not the glyphosate, but the surfactant in it. Use Eliminator weed killer(41% glyphosate). Twice strength as Roundup and 1/2 the cost. I have used a mixture of the triclopyr and eliminator and sprayed the big trees around edge of pond. Waiting to see the results. Did last wk. I sprayed from boat using a DC pump and 5 gal bucket. Of course some got in the water, but did not damage the shiners and bluegills at all. I think some of those articles are written by Greenpeace or similar. Maybe if a goldfish is given straight glyphosate for 2 wks straight in controlled conditions, there may be an allergic reaction.
Both herbicides above from Walmart.
