Nobody thinks about plant pests until there’s a problem. And by then it’s usually too late.
That’s sort of the uncomfortable truth sitting behind International Day of Plant Health, which falls on May 12 this year. The Canadian Food Inspection Agency is using it to remind Canadians that protecting the country’s crops, forests, and natural spaces isn’t just something Ottawa handles. It starts with regular people making pretty mundane decisions, like what they throw in their luggage coming home from a trip, or where they’re buying seeds online, and whether they’ve thought about that at all.
Which sounds minor. Until you look at the numbers.
Plants make up roughly 80 percent of the food we eat. Canada’s plant-based sectors, forestry, grains, ornamental flowers, all of it combined, push something close to $150 billion in economic activity. Real towns, real jobs, real supply chains that depend on things staying healthy. When an invasive pest gets loose it doesn’t stay politely contained to one field or one province.
The emerald ash borer is probably the clearest example of how fast that can go sideways. It’s now across six provinces and has killed millions of ash trees across North America. The spotted lanternfly hasn’t made it into Canada yet but it’s already dug into parts of the U.S. and the CFIA added it to the regulated pest list back in 2018, which tells you something about how seriously they’re watching it. There’s also the hemlock woolly adelgid, tiny insect, looks like little cotton balls stuck to tree needles, and it’s quietly doing damage to hemlock forests in Ontario and Nova Scotia right now.
These aren’t scare stories. This is just what’s happening.
What’s worth looking at is how these things actually travel. It’s mostly us. Somebody brings back fruit they weren’t supposed to. Someone orders seeds from an overseas supplier without checking if that’s even legal. A family moves firewood between campsites without thinking twice. Nobody’s trying to cause harm. They just didn’t know, or didn’t think about it, and that’s almost harder to fix than deliberate behavior.
The asks from the CFIA are genuinely not that complicated. Don’t bring produce, seeds, or soil back when you travel. Be careful buying plants online and check whether you need a phytosanitary certificate before anything ships to you. If you’re growing crops, take biosecurity standards seriously. And if you spot something on a plant or tree that looks wrong and you can’t identify it, report it.
That last one is probably the most underrated. Early detection is basically the only real advantage anyone has. Once something establishes itself the response gets expensive and slow and rarely fully works anyway.
It sounds strange to say that billion-dollar industries and whole ecosystems are partly depending on whether regular people check their bags at the airport. But that’s kind of just where things are. The government programs and border controls and lab analysis all matter, they’re doing real work, but they have limits.
The rest falls to the public. So far that’s been the weak link.
Spot something unfamiliar on a plant or tree? Report it to the CFIA at inspection.gc.ca
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