Glyphosate concentrates come in different strengths, and choosing the wrong one for a large area means either paying for water you did not need to buy, or running out of product halfway through the job.
This guide explains what the “540” in a glyphosate concentrate means, how it compares with 360 g/L, and how to work out the right rate for acreage, fence lines and firebreaks.
In this guide, we’ll explore:
How Does Concussion 540 Work?
Glyphosate, the active ingredient in Concussion 540, inhibits the EPSP synthase enzyme, which is essential for plant growth. This disruption prevents the plant from producing vital amino acids, leading to gradual wilting and death.
Key Features of Concussion 540’s Mode of Action:
Systemic Herbicide: Absorbed through leaves and transported to roots.
Non-Selective: Kills most plants it comes into contact with (avoid spraying desirable plants).
Slow-Acting: Takes 7–14 days to show full effects, ensuring complete root kill.
Because glyphosate is translocated throughout the plant, it is highly effective against deep-rooted weeds like couch grass, blackberry, and dock.
Key Benefits of Using Concussion 540
Highly Effective Against Tough Weeds
Concussion 540 is particularly useful for controlling hard-to-kill perennial weeds, including:
Couch grass
Blackberry
Thistles
Dandelions
Bindii
Cost-Effective Weed Control
Compared to manual weeding or repeated applications of weaker herbicides, Concussion 540 provides long-lasting results with a single application.
No Soil Residual Activity
Unlike some pre-emergent herbicides, glyphosate does not persist in the soil, allowing you to replant treated areas once the weeds have died.
Versatile Use Cases
Gardens & Lawns (before replanting)
Farming & Pastures
Industrial & Commercial Landscaping
Fence Lines & Driveways
Common Weeds Controlled by Concussion 540
| Weed Type | Examples | Control Level |
|---|---|---|
| Grassy Weeds | Couch, Kikuyu, Winter Grass | Excellent |
| Broadleaf Weeds | Clover, Dandelion, Plantain | Excellent |
| Woody Weeds | Blackberry, Lantana | Good (may require higher dose) |
| Sedge Weeds | Nutgrass | Limited (use a specialist sedge herbicide) |
For best results, apply Concussion 540 when weeds are actively growing (spring to autumn).
How to Apply Concussion 540 Effectively
Step 1: Prepare the Solution
Dilution Rate: Mix 100mL of Concussion 540 per 10L of water for general weed control.
Heavy Infestations: Use 200mL per 10L.
Step 2: Spraying Technique
Use a knapsack sprayer or pump sprayer.
Apply evenly over foliage (avoid runoff).
Do not spray on windy days to prevent drift.
Step 3: Post-Application Care
Avoid watering or mowing for at least 6 hours.
Weeds will begin yellowing in 3–7 days and die within 2 weeks.
Safety Precautions When Using Glyphosate Herbicides
While Concussion 540 is highly effective, proper handling is crucial:
Personal Protection
Wear gloves, long sleeves, and goggles.
Avoid inhaling spray mist.
Environmental Considerations
Do not spray near waterways (glyphosate can harm aquatic life).
Keep away from pets and children until dry.
Storage & Disposal
Store in a cool, dry place.
Dispose of empty containers as per local regulations.
Frequently Asked Questions (FAQs)
How long does Concussion 540 take to work?
Visible effects appear in 3–7 days, with complete kill in 10–14 days.
Can I plant after using Concussion 540?
Yes! Glyphosate has no soil residual effect, so you can replant once weeds are dead.
Is Concussion 540 safe for pets?
Once dry, it is safe, but keep pets away during application.
Why Choose Garden Nursery Products for Your Gardening Needs?
At Garden Nursery Products, we’re your trusted Gold Coast garden supply experts. Whether you need herbicides like Concussion 540, fertilisers, fungicides, or landscaping supplies, we stock high-quality products to keep your garden thriving. Visit us today or shop online!