Activated Amitrole 400, 1L (Herbicide)

Activated Amitrole 400 is a non-selective Herbicide used for the control of many Grasses and Broadleaf Weeds. Because of its relatively short life it can be used under Trees and Shrubs and in areas where Crops are to be grown 4-6 weeks after application.
Active Ingredient:
400g/L Amitrole in the form of a water Soluble Concentrate.
What It Controls:
Controls A Wide Range Of:
- Annual Grasses.
- Perennial Grasses.
- Broadleaf Weeds.
- Brushweeds (e.g. Gorse, Blackberry).
- It’s used where you want bare ground or full cleanup, not selective spraying.
Where It’s Used:
Typical Label Uses:
- Non-crop areas (Yards, Fencelines, Drains, Waste areas).
- Forestry.
- Orchards/Vineyards (directed use only).
- Pre-cropping situations.
- Asparagus (specific timing).
Not For:
- General lawn spraying.
- Anywhere you want plants to survive.
How It Works:
- Absorbed through Foliage.
- Moves through the Plant and disrupts growth.
Important Difference:
- Slow acting (can take weeks to months for full kill).
Example From Label:
- Brushweeds may take up to 6 months to fully die.
Mixing Rates:(From Label Examples).
General Weed Control.
~1 L / 100 L water → easy Weeds.
~ 2 L / 100 L water → harder Weeds.
Knapsack / Spot Spraying.
~10–20 mL per litre depending on Weed type Brushweeds (e.g. Blackberry).
~ 15–20 mL per litre water.
Key Idea:
- Stronger mix = tougher Weeds.
- Always spray to wet foliage thoroughly.
When To Spray: (CRITICAL).
Best Results When:
- Weeds are actively growing and good leaf coverage is present.
Examples From Label:
- Blackberry → spray Nov–May.
- Gorse/Nightshade → during active growth.
Avoid:
- Drought conditions.
- Frost.
- Stressed Plants.
Application Tips:
- Spray to full coverage (Leaves + Stems).
Use:
- Knapsack.
- Handgun.
- Boom spray.
- Follow-up is often required.
- Burning, Crushing, or re-spraying may be needed for tough Weeds.
Spray Drift: (Warning)
The Label Clearly Warns:
- Spray drift may cause serious damage to desirable plants.
- Since it’s non-selective, drift = damage to.
- Trees.
- Crops.
- Gardens.
- Neighbours Plants.
Safety & Hazards: (Key Risks).
- Causes eye irritation.
- Suspected reproductive toxicity.
- Can damage organs with repeated exposure.
- Toxic to aquatic life.
PPE Required:
- Gloves.
- Protective clothing.
- Eye protection.
Environmental Risks:
Harmful To:
- Waterways.
- Soil organisms.
Label Implications:
- Keep away from drains and streams.
- Prevent runoff.
Special Use Notes: (IMPORTANT).
Forestry.
- Can be used pre-plant or early post-plant.
- Avoid contact with tree growing tips.
Asparagus.
- Only before spears emerge or after final harvest otherwise severe crop damage.
Key Mistakes To Avoid:
- Expecting fast results, this is slow acting → don’t re-spray too quickly.
- Using it like Glyphosate it works differently and often slower.
- Spraying near desirable plants It will kill almost anything green.
- Poor coverage it needs full leaf coverage to work well.
Bottom Line:
- Non-selective, total vegetation killer.
- Works on hard-to-kill and Perennial Weeds.
- Slow but thorough it often requires follow-up control.
- High risk of off-target damage.
Caution:
Must be used strictly according to label directions.

Available in 1L, 5L, 20L