Rodeo Herbicide is not labeled for American pondweed so we cannot confirm if it will kill it. Diquat Water Weed and Landscape Herbicide would be a good option to use (.75 fl oz per gallon) and should be used with a surfactant, such as the Non-Ionic Surfactant. The ratio for that product is 1-2 teaspoons per gallon of water.
Rodeo Herbicide should be used and applied within 24 hours of mixing with water for the most effectiveness.
You will see full results of an application of Rodeo Herbicide within 14 days.
Bamboo is very difficult to kill since its roots grow so deep. A glyphosate product like Rodeo will need to be applied at the highest labeled rate directly to the fresh cut stump of the bamboo after you cut it down level to the ground. You could also use a brush and stump killer applied undiluted directly on the fresh stump.
Rodeo Herbicide states on the product label that it can be applied to emerged weeds in all bodies of fresh and brackish water that may be flowing, nonflowing or transient.
You will use 2 2/3 fl. oz. of Rodeo Herbicide per gallon of water.
You can seed areas 2 weeks after using Rodeo Herbicide.
Rodeo Herbicide is labeled for thistle, and when used as directed on the product label, it is safe in and around aquatic sites that have fish and other aquatic life.
Rodeo Herbicide is mixed at the rate of 2 ounces per gallon of water for crabgrass.
Rodeo contains glyphosate which is a non-selective herbicide. Non-selective herbicides will kill just about any vegetation that they are sprayed on. If the tree is established, then the Rodeo should have no effect on the tree roots. You should try to limit the exposure to the tree and only directly treat the vegetation you are trying to get rid of. Please contact your local cooperative extension office for alternate solutions as the tree is in the pond.
Rodeo Herbicide has no grazing/drinking restrictions on the label except for lactating cattle.
With Rodeo Herbicide it starts to be absorbed immediately as long as the weed is actively growing and healthy, and not stressed by heat, cold or drought conditions. Visible effects on most annual weeds occur within two to four days, but on most perennial weeds visible effects may not occur for seven days or more, with complete kill taking up to 2 weeks and may take multiple applications depending on the type of weed.
The best time to treat for cattails with Rodeo Herbicide is just after the seed head has formed on the plant.
Rodeo Herbicide is more of an aquatic herbicide, so it is safe for use around or in water. Most RoundUp products state not to apply directly to water, to areas where surface water is present, or to intertidal areas below the mean high water mark.
Rodeo Herbicide will kill Lily Pads. If you are making an application with a sprayer you would use approx. 2 and 2/3 fluid oz. Rodeo per gallon water or 5 pints Rodeo per acre. Please refer to the product label for application.
We have heard that some people use dish soap as a surfactant, however, we cannot recommend it because there is not enough research behind it. We recommend using a product like the Non Ionic Surfactant with Rodeo Herbicide.