Glyphosate is cheap!
That’s the argument we hear over and over—from councils, contractors, and farming groups alike. Why change what works? Why spend more when glyphosate does the job for less?
But what if that low upfront price tag is hiding a much bigger bill?
The truth is, glyphosate’s affordability is part of what made it so attractive in the first place. But over time, its dominance has come at a cost—one that’s rarely counted in dollars alone.
Cost per Acre Isn’t the Full Story
Depending on the formulation and rates used, glyphosate can cost as little as USD $7–$15 per acre—roughly NZD $27–$60 per hectare. That’s a fraction of the price of newer or alternative products. But cost per litre and cost per hectare are only part of the equation.
What’s left out of those figures?
- The rise of glyphosate-resistant weeds, requiring more frequent applications or “tank mixes” with other herbicides.
- Soil degradation, leading to increased fertilizer needs and declining natural fertility.
- Health costs linked to chronic low-dose exposure, especially in rural areas and school grounds.
- The legal fallout, as councils and corporations face lawsuits over long-term harm.
- The environmental toll, including runoff into waterways, pollinator loss, and biodiversity decline.
If these were tallied on the invoice, glyphosate would look a lot less “cheap.”
The Superweed Spiral
In many parts of the world—including New Zealand—glyphosate-resistant weeds are becoming more common. When that happens, farmers often respond with more glyphosate, more often, or by adding in other herbicides like 2,4-D or dicamba.
This not only increases costs over time—it also intensifies chemical exposure and ecosystem disruption.
We’re not just paying more. We’re getting diminishing returns.
“Overreliance on a single tool is never sustainable. When it stops working, there’s nothing left in the toolbox.”
Low Cost, High Exposure
Because glyphosate is cheap and widely available, it’s used everywhere: on footpaths, around schools, on sports fields, roadside verges, public parks, and rural driveways. Many of these applications aren’t about economic necessity—they’re about habit.
And that widespread use means widespread exposure, especially for children, pets, and contractors who work without adequate safety measures. Even the Ministry of Health has acknowledged it doesn’t track glyphosate-related illness—yet independent tests have shown it’s in our food, our waterways, and our bodies.
A low price tag shouldn’t mean a free pass to ignore the risks.
What Are We Really Paying For?
Let’s break it down. Glyphosate’s true cost includes:
- Subsidised environmental cleanup (e.g. polluted drinking water, stream restoration)
- Future-proofing farmland against declining yields
- Medical costs that may take decades to appear
- Public distrust, lawsuits, and regulatory overreach caused by government inaction
These hidden costs aren’t always accounted for in budgets—but they’re real. From ACC injury claims to soil restoration and water testing, the public often foots the bill.
When communities reject glyphosate, it’s not just about the price per litre. It’s about the principle of long-term thinking over short-term savings.
Final Thought
Glyphosate is cheap—but only if you ignore everything it touches.
When you add it all up, the cheapest option may be the most expensive mistake we’ll ever make.
Related Articles
Glyphosate and Soil Health: What Are We Losing?
Glyphosate’s impact goes far beyond weeds. This article explores how repeated use degrades soil microbiology, fertility, and the long-term resilience of farmland.
Weed Resistance in New Zealand: A Growing Crisis
Overuse of glyphosate is leading to herbicide-resistant weeds—forcing farmers into a costly chemical spiral that undermines sustainability and productivity.
MPI’s Missing Data: Why We Can’t Trust the Glyphosate Reassurance
Despite official claims of safety, MPI hasn’t updated its glyphosate testing in nearly a decade. Can public confidence be built on outdated data?
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