Weed Control
Best Brush Killer: The Method Decides the Formulation
Penn State: an oil-based triclopyr ester goes on any time after cutting; a water-based one must be applied immediately. Choose the method, then the bottle.
Brush and Poison Ivy Herbicide (concentrate, two actives)
Roundup Poison Ivy Plus Tough Brush Killer Concentrate, 32 oz Review
★★★★☆ 4.4/5
our editor rating how we score4.6/5 from 875 shoppers at Amazon — their number, not ours.
$26–$32
Typical price · 32 oz concentrate; Alabama Extension's figure for this product is 6 oz per gallon treating 300 sq ft
Affiliate links — see our disclosure. Commissions never influence verdicts.
A Roundup-branded bottle that genuinely does contain glyphosate — 18% of it — plus 2% triclopyr, and is therefore non-selective in a way the pure triclopyr bottles are not.
Our Verdict
Worth reviewing partly for what it teaches about the brand. Roundup is a brand name rather than an ingredient, and our catalogue also contains a Roundup-branded bottle with no glyphosate in it at all. This one has 18% glyphosate isopropylamine salt plus 2% triclopyr triethylamine salt, on EPA Reg. 71995-37 — registered as MON 78736 Herbicide, with Roundup Concentrate Poison Ivy Plus Tough Brush Killer among its alternate brand names. Alabama Extension's residential kudzu table lists this product at 6 oz per gallon treating 300 sq ft, and 100% for a cut stump. The two-active combination is a real advantage on a mixed problem — glyphosate handles the grasses and herbaceous weeds around the vine that triclopyr alone leaves standing — and a real disadvantage everywhere else, because it makes the product fully non-selective. On a fence line you are clearing entirely, that is what you want. Near anything you are keeping, the pure triclopyr concentrates are the safer purchase.
✅ Pros
- Genuinely contains glyphosate — 18% — unlike some Roundup-branded bottles, so it also takes the grass
- Alabama Extension's kudzu table gives this product a rate: 6 oz per gallon treating 300 sq ft, 100% for cut stumps
- Two modes of action on one pass, useful where a vine is tangled through grass and weeds
- 4.6 across 875 Amazon ratings — the highest score of the brush concentrates here
⚠️ Cons
- Fully non-selective: the glyphosate removes grass and every broadleaf it touches
- The most expensive of the concentrates here per unit of active
- Fewer ratings than the triclopyr-only bottles, which have four to five thousand each
- Brand confusion is real — check the active ingredient panel, not the word Roundup
Product type
Brush and Poison Ivy Herbicide (concentrate, two actives)
Active ingredient
Glyphosate, isopropylamine salt 18% + Triclopyr, triethylamine salt 2%
Price range
$26–$32
Coverage
32 oz concentrate; Alabama Extension's figure for this product is 6 oz per gallon treating 300 sq ft
Best for
Clearing a fence line or bank completely, where grass and brush both have to go
our editor rating
4.4 out of 5
Where our facts come from
Label read on EPA's label database
EPA Reg. No. 71995-37
We opened this product's accepted label on EPA's own Pesticide Product Label System — the strongest source available for what a product is registered to do.
What we found when we read it
EPA PPLS registry record read 2026-08-02: registered product name 'MON 78736 HERBICIDE', EPA Reg. 71995-37, actives glyphosate isopropylamine salt 18% and triclopyr triethylamine salt 2%, with ROUNDUP CONCENTRATE POISON IVY PLUS TOUGH BRUSH KILLER among its alternate brand names. This matches the row in Alabama Extension ANR-2168 exactly (glyphosate 18.0 + triclopyr amine 2.0), which is what confirms the identification. Rates in this record are Alabama's published figures for this product, not readings from the label PDF — the full label text has not been read. The Amazon listing carries a subscript numeral for the formulation revision.
Where this page and the container disagree, the container wins — the label is the legal authority on rates and restrictions. How to read one yourself.
Common questions
Common Questions
How much does Roundup Poison Ivy Plus Tough Brush Killer Concentrate, 32 oz cost?
Roundup Poison Ivy Plus Tough Brush Killer Concentrate, 32 oz typically runs $26–$32, covering 32 oz concentrate; Alabama Extension's figure for this product is 6 oz per gallon treating 300 sq ft.
What does Roundup Poison Ivy Plus Tough Brush Killer Concentrate, 32 oz treat?
Roundup Poison Ivy Plus Tough Brush Killer Concentrate, 32 oz targets poison ivy, poison oak, poison sumac, kudzu, wild blackberry, brush.
What is the active ingredient in Roundup Poison Ivy Plus Tough Brush Killer Concentrate, 32 oz?
Glyphosate, isopropylamine salt 18% + Triclopyr, triethylamine salt 2%, registered under EPA Reg. No. 71995-37.
What is the biggest downside of Roundup Poison Ivy Plus Tough Brush Killer Concentrate, 32 oz?
Fully non-selective: the glyphosate removes grass and every broadleaf it touches
Real feedback
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