Biogents BG-Mosquitaire in Canada: CO2 vs Lure-Only, and What It Costs to Run

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The two orders that matter — the trap, and the lure you will need before August:

What the BG-Mosquitaire Actually Is

Biogents is a German company whose BG-Sentinel trap became the standard surveillance tool for monitoring Aedes and Culex populations — the thing public-health programs and academic entomologists deploy when they need to know what is flying. The BG-Mosquitaire is the consumer build of that design: the same fan-driven airflow pattern and the same BG-Lure attractant, in a housing meant to sit in a garden bed rather than a field study.

Mechanically it is unglamorous, which is the point. A quiet fan draws air through the trap and pushes a plume upward in a pattern that imitates the convection currents rising off a warm human body. The BG-Lure adds the chemical half of the signal — an artificial imitation of human skin scent. A host-seeking female flies in along that plume, gets pulled through the funnel by the suction, and ends up in a catch bag she cannot leave. There is no electrocution grid, no chemical, and nothing applied to the yard.

That last part matters more than it sounds. A trap is a device, not a pesticide, so nothing here is regulated by Health Canada’s PMRA the way a spray is, and no residue lands on your grass or your patio furniture. It is the chemical-free end of mosquito control, which is exactly why a certain kind of homeowner is willing to spend $400 on one.

If you are still at the category stage — deciding whether a CO2 trap of any kind is the right approach — start with our overview of CO2 mosquito traps in Canada. This page assumes you have already landed on Biogents and are choosing between its versions.

CO2 or Lure-Only? The Decision That Costs the Most Money

Biogents sells the BG-Mosquitaire two ways, and the price gap between them is not trivial once you count the cylinder and the regulator you will also have to buy.

The standard trap runs on the lure alone. No cylinder, no tank, no combustion — you plug it in, seat a BG-Lure, and it works. Skin scent is a short-range, high-specificity signal: it is what a mosquito follows over the last stretch, and it is particularly effective on the container-breeding Aedes that make a suburban backyard miserable during the day.

The CO2 version adds a carbon-dioxide plume fed from a cylinder through a pressure regulator. CO2 is the long-range signal — it is how a mosquito notices there is a mammal in the vicinity at all, before scent ever comes into it. Adding it extends the trap’s reach and helps disproportionately against species that hunt by breath more than by skin, Culex pipiens being the obvious Ontario example, and the one that matters for West Nile virus risk.

So which do you buy? Our position, based on what actually happens in GTA backyards: start lure-only. A standard suburban lot with a fence line and some shrubs is a small enough area that the extra reach buys less than the extra hardware costs, and every CO2 setup adds a cylinder to store, a regulator to fit, and refills to remember. Move up to the CO2 version if your property genuinely backs onto a ravine, a stormwater pond, a creek or a wetland — a source big enough that you are fighting an incoming population rather than a resident one — and preferably after a season of lure-only has shown you it is not enough.

Running Cost: This Is Where It Beats Propane

The strongest argument for a Biogents trap in Canada is not catch performance, it is the feeding schedule. Compare the two across a single May-to-September Ontario season:

• BG-Mosquitaire, lure-only. A low-wattage fan running continuously for about five months, which is a few dollars of electricity. One or two BG-Lure cartridges, since Biogents rates a lure for months rather than weeks. An occasional replacement catch bag or gauze. That is a consumables bill in the tens of dollars.
• Propane trap. A 20 lb tank that needs swapping roughly every three weeks — call it six refills across a season — plus attractant cartridges on a similar clock. That is a several-hundred-dollar season, every season, and it is six trips to exchange a tank during the months you are least inclined to run errands.
• BG-Mosquitaire CO2. Somewhere in between: the lure cost plus cylinder refills, with no combustion and no 20 lb tank to lift.

Amortised over three or four seasons, the electric trap’s higher purchase price is repaid by the propane trap’s fuel bill. That is the honest financial case, and it is the reason we point suburban clients at Biogents even though a Mosquito Magnet covers more ground. Where propane still wins is reach: on a rural acreage or a cottage lot, no lure-only electric trap covers what a propane trap does, and that is worth the tank swaps.

Siting: The Part Everyone Gets Wrong

A trap is an attractant. Put it beside the patio and you have installed a device whose job is to pull biting females toward the exact chairs you sit in. We see this constantly, and it is the single most common reason a $400 trap gets called useless.

Six rules that decide whether the machine works:

• Put it between the mosquitoes and you. Identify the source direction — the ravine edge, the wooded lot line, the neighbour’s pond, the drainage swale — and site the trap on that side of the yard, well away from the seating area.
• Shade, not sun. Mosquitoes rest in shaded, humid vegetation during the day. A trap baking in the middle of a sunny lawn is in the wrong microclimate entirely.
• Low, not high. These are low-flying insects. Ground level or just above it, not up on a deck rail.
• Out of the wind. A steady breeze shreds the plume the trap depends on. Sheltered corners work; exposed open ground does not.
• Near vegetation, not in the open. Beside a shrub line, a hedge, or the treed edge of the property.
• Then leave it alone. Continuous operation in one location for weeks is the mechanism. Moving it around the yard chasing results resets the clock every time.

One practical Canadian footnote: you will need power out there. Most people discover at install time that the nearest exterior outlet is thirty or forty feet from the correct siting spot. Buy a proper heavy-gauge outdoor extension cord rather than running an indoor cord out a window, and cover the connection — it will sit through an Ontario summer of thunderstorms.

The Mistake Most Canadian Buyers Make

They buy it in mid-July, after three bad weekends in a row, and expect the yard to be different by Saturday.

A trap removes host-seeking and egg-laying females one at a time, continuously. The effect compounds — every gravid female caught is also the batch of eggs she was about to lay — but it is a draw-down curve, not a knockdown. Realistically you notice a difference across two to six weeks of uninterrupted running, and the benefit is largest late in the season if you started early. A trap bought on July 15th and judged on July 20th will be judged as a failure regardless of how good it is.

The fix is a calendar one: put it out in early May, before the first generation is established, and run it straight through to September. That is also why the lure multipack is a smart same-cart purchase — the trap that sits idle for two weeks in August because nobody ordered a cartridge loses more ground than the cartridge costs.

When Something Cheaper Is the Right Answer

We would rather tell you not to buy this than have you buy it for the wrong yard. Four cases where the money is better spent elsewhere:

• You need the yard usable this Saturday. No trap does that. A barrier treatment knocks the resting population down within hours and holds for weeks; that is a different tool for a different question.
• You use the yard a handful of evenings a summer. A Thermacell-style personal repellent zone costs a fraction of a Biogents trap and protects the patio for the hours you are actually in it. Our Thermacell guide for Canada covers that end of the market.
• Your yard is making its own mosquitoes. If there is standing water on the property — a saucer under a planter, a clogged eaves trough, a tarp with a puddle, an untreated rain barrel — you are breeding the problem faster than any trap removes it. Ten minutes with the checklist in hidden mosquito breeding spots costs nothing and often outperforms a $400 machine.
• You have an acre or more, rural. Lure-only reach is not the answer at that scale. Read the acreage comparison in our best mosquito traps in Canada roundup before spending here.

What It Will and Will Not Catch in Ontario

Three groups dominate a GTA backyard, and the trap treats them differently:

• Container-breeding Aedes — the aggressive daytime biters that breed in a saucer of water and never leave your property. Skin-scent lures work well on this group, which is the case for the lure-only trap.
• Culex pipiens — the dusk-active house mosquito, and the West Nile vector. More CO2-driven, which is the specific argument for the CO2 version on a property near stagnant water.
• Floodwater Aedes vexans — the wave that appears a few days after heavy rain, hatching from ground that was dry a week ago. Nothing traps its way out of that pulse alone; it is a volume problem.

And to be unambiguous about the thing homeowners most often hope for: it catches no ticks whatsoever. Ticks do not fly, are not drawn to a plume, and are never intercepted by a suction trap. Tick pressure in the GTA has been rising for years, and it is a ground-level problem solved at the lawn-to-woods edge, in leaf litter and along fence lines — not in the air.

Canadian Ownership: Power, Winter, and Where to Buy

The trap runs on standard 120 V household power and wants to be on continuously, so plan the outlet before the trap arrives. Use an outdoor-rated heavy-gauge cord, keep the connection covered and off the ground, and put it on a GFCI-protected circuit like any other outdoor appliance.

At the end of the season — late September or early October in the GTA — unplug it, empty and wash the catch bag, dry everything completely, and store the unit indoors in a sealed bin. Ontario winters end outdoor electronics, and a fabric catch bag left in a shed becomes rodent nesting material by February. Store spare lures sealed and cool so they are still good in May.

For purchasing: amazon.ca is the most reliable Canadian channel for the whole Biogents ecosystem — the trap, both versions, lure cartridges, BG-Sweetscent, catch bags, gauze, and the passive BG-GAT. Big-box retailers here stock propane traps, UV zappers, and cheap combination units seasonally, not research-grade equipment, so ordering online is generally the only route. Buy a spare lure in the same cart.

The Bottom Line

The Biogents BG-Mosquitaire is the best consumer mosquito trap a Canadian can buy online, and the lure-only version is the one to get. It has the research lineage, it costs almost nothing to feed compared with a propane trap, and it does its work without putting anything on your lawn. Site it between the source and your patio, in shade, low, out of the wind. Run it from early May to late September without moving it. Buy the lure multipack in the same order. Bring it inside for winter.

What it will not do is fix a bad Saturday, cover an acre, out-run standing water on your own property, or touch a tick. If any of those is your actual problem, spend the money somewhere else — and if what you want is a yard that is usable tonight and stays that way, a trap belongs alongside a barrier treatment rather than instead of one.

Frequently Asked Questions

Related Reading

• CO2 Mosquito Traps in Canada — The Category Overview
• Best Mosquito Traps in Canada — Every Type Compared
• Mosquito Magnet in Canada — The Propane Alternative
• Propane Mosquito Traps — Reach, Tanks & Real Costs
• West Nile Virus & Mosquito Risk in Ontario
• BuzzSkito Professional Mosquito Control Service