Tordon RTU is a Ready To Use herbicide and should not be diluted with water. This product is not labeled to control barberry, and it also should not be used in residential areas. The active ingredient in Tordon RTU has an extremely long half-life and, therefore, it can remain active in the area for years after application. To control a shrub like barberry, you would probably need to cut the shrubs down and treat the fresh cuts with a brush killer such as Fertilome Brush and Stump Killer directly to the fresh cuts.
Tordon RTU Specialty Herbicide is not labeled to control sprouting on poplar. We would recommend an herbicide containing Triclopyr to treat the cut stumps, such as Remedy Ultra (needs to be diluted with an oil) or Fertilome Brush Killer and Stump Killer (may be applied undiluted).
Tordon RTU Specialty Herbicide is not labeled for use on Brazilian pepper or melaluca.
Yes, Tordon RTU Specialty Herbicide is effective in killing over 20 different woody species, including cedar, and preventing resprouting of those cut trees. Unfortunately, it is hard to say for sure how long it will take because the kill time is due in part to many environmental factors. If you need further assistance you may contact Dow AgroSciences at 800-992-5994.
Tordon RTU Specialty Herbicide is not labeled to be poured around the base of a tree as a drench. This product can be applied three ways; Tree Injection Treatment, Frill or Girdle Treatment & Stump Treatment.
Tree Injection Treatment: Use 1 milliliter of undiluted Tordon RTU solution through the bark
completely around the tree trunk at intervals of 2 to 3 inches between
edges of the injector wounds. Make injections near ground level when
using the tree injector or 2 to 4 feet above the ground when using a
Hypohatchet Injector or similar device. Treatments can be made in any
season. Maples should not be treated during the spring sap flow. With
some difficult to control species such as dogwood, hickory, sugar maple,
bigleaf maple, tanoak, and some firs, application to a continuous cut
rather than to spaced cuts may be more uniformly effective.
Frill or Girdle Treatment: Make a single hack girdle or "frill" of overlapping ax cuts through the bark
completely around the tree as close to the ground as feasible. Spray or
paint the injured surface with undiluted Tordon RTU, using enough volume
to wet treated areas.
Stump Treatment: Spray or paint the cut surfaces of freshly cut stumps and stubs with
undiluted Tordon RTU. The cambium area next to the bark is the most
vital area to wet.
Tordon RTU Specialty Herbicide is not labeled specifically to control prickly pear or other cacti, but some articles recommend this active ingredient to aid in control. One very difficult part of controlling this plant is that all debris must be removed from the area to prevent resprouting. Unfortunately, we do not have any herbicides currently labeled to control cactus. This Field Guide from the USDA discusses control methods for prickly pear cactus. Another active ingredient mentioned is Fluroxypyr, which we do have in the product E-2 Herbicide. We recommend consulting your local Cooperative Extension office for assistance. Since this is a heavily invasive species of importance, most local offices will want to know where the plant is being found.
Tordon RTU Specialty Herbicide is not labeled for buckthorn. Crossbow or RoundUp can be used to kill cut stumps. Apply immediately after cutting the stump to prevent resprouting. There is a great article here from the Dept of Natural Resources in Minnesota that may be helpful.
The best fertilizer to use will depend on the specific needs of your lawn and soil. We recommend using a soil analysis test kit or taking a sample of your soil to your local cooperative extension so your soil can be analyzed to determine what nutrients your soil is lacking. The healthiest, hardiest lawns are fertilized 2-4 times per year, fall, summer, early spring and late spring
We do offer a soil test kit here.
Tordon RTU Specialty Herbicide is best applied to fresh cut stumps, so you can either make a fresh cut or you can drill new holes and then apply. Since the active ingredient in Tordon RTU is known to leach into the soil from treated roots and can remain for several years you would need to completely replace any soil in the area before planting anything else. Untreated trees/plants can occasionally be affected by root uptake of herbicide through movement into the the topsoil or by excretion of the product from the roots of nearby treated trees. Do not apply Tordon RTU within the root zone of desireables unless such injury can be tolerated.
Tordon RTU should be applied to freshly cut stumps.
Tordon RTU Specialty Herbicide is best used on freshly cut stumps while ensuring the cambium area next to the bark gets thoroughly wet. We would recommend either drilling holes into the top surface of the stump or cutting off the top layer of the stump for a fresh application.
Please provide details on the tree and application for more details on how to apply properly for the best results.
The results will vary when using Tordon RTU Specialty Herbicide on a mature, well established root system with other factors involved such as soil conditions or unfavorable temperatures.
Tordon RTU Specialty Herbicide is labeled to control maples in general, though we are not sure if it has been tested specifically on Norwegian maples. Keep in mind that Tordon RTU should not be used on residential properties at all: this product has a very long half-life and can affect other plants near the treatment area for years after application. Please let us know if you need a recommendation for an alternate product.
Tordon RTU Specialty Herbicide when applied per label will treat and prevent saplings including Black Locust Tree Saplings
Tordon RTU Specialty Herbicide will take down a China Berry Tree as long as you cut into the stump and apply undiluted to the tree.
Yes, Tordon RTU Specialty Herbicide will kill Catalpa trees. According to the product label, Tordon RTU should not be applied to residential or commercial lawns or near ornamental trees and shrubs. Untreated trees can occasionally be affected by root uptake of herbicide through movement into the topsoil or by excretion of the product from the roots of nearby treated trees. Do not apply Tordon RTU within the root zone of desirable trees unless such injury can be tolerated.”
Tordon RTU Specialty Herbicide does work best on freshly cut stumps or fresh cuts in trees.
Tordon RTU Specialty Herbicide is not labeled for yaupon. Remedy Ultra Herbicide? is labeled for yaupon holly and should do a good job when used as directed on the product label. ? Hi-Yield Triclopyr Ester Ultra contains the same active ingredient at a lower cost if smaller areas need treatment.