Killing stumps/trees which have roots that run into water areas can be tricky. Most stump killer products do not address aquatic life safety from indirect applications that could impact them, so we couldn't say for certain if applying just to the fresh cut of the stump, if the Fertilome Brush and Stump Killer would have a negative impact. You can always contact the manufacturer directly to see if they have any specific use instructions they would suggest for that application. You can reach VPG at 888-583-5296, An alternative option to try would be using aquatic plant killing products like Roundup Aquatic or Hi Yield 2,4D which may take multiple treatments, but are safe for aquatic life whether the product gets into the water directly or indirectly.
The mix rate for Ferti-lome Brush Killer and Stump Killer will depend on what and where you are treating.
The label suggests the following treatments: Applying as a foliage spray: 8 - 16 tbsp. per gallon of water per 500 sq. ft. For Stump Treatment: Apply undiluted product with a paint brush to completely cover the fresh cut surface and for Vine Control, cut the vine first and treat as directed for stump treatment
Fertilome Brush Killer should not be applied directly to water. We would recommend using the product at least 3 feet away so that it does not get into the water.
When applying Ferti-lome Brush Killer and Stump Killer as a foliar spray, you will use 4-8 oz in 1 gallon of water at a rate of 1 gallon of solution per 500 square feet, being sure to wet all leaves thoroughly.
You can use a product like the Fertilome Brush Killer and Stump Killer as either a foliar spray or a cut stump treatment. For a stump treatment, you would cut the stumps and apply the product undiluted directly to the fresh cuts. It may be difficult to do a cut stump treatment on very small seedlings, so you can wait until the seedlings have some leaves and are actively growing. At that point, you could do a foliar spray by using 4-8 oz in 1 gallon of water at a rate of 1 gallon of solution per 500 square feet, being sure to wet all leaves thoroughly.
For Autumn Olive, it is recommended that after cutting large bushes, it is best to immediately apply a glyphosate herbicide or Fertilome Brush Killer. If new shoots appear later, spray them to kill them. The most successful method is to remove the autumn olive bush, roots and all.
Tordon RTU Herbicide is labeled to treat Ailanthus stumps. For stump treatment, it is recommended to spray or paint the cut surfaces of freshly cut stumps and stubs with undiluted Tordon RTU. Please follow all label instructions.
