Biogents
Biogents BG-GAT (Gravid Aedes Trap)
Trap · Device
Retailer links may earn us a commission. Scores are never affected.
Pros
- Genuinely catches host-seeking mosquitoes with CO2, heat, and scent (about 20-50% fewer bites where well placed)
- Chemical-free and far more selective than a bug zapper
Cons
- Thins the mosquito population slowly over the season rather than protecting you on the spot
- Results swing hard with placement: set it between the breeding area and where you sit, never right next to you
- Needs propane and lure refills, plus continuous running, to keep working
- Expensive up front for a modest, hard-to-verify reduction in bites
The full review
Passive gravid-Aedes trap from Biogents that uses no electricity, no propane, and no CO2. A black bucket of infused water imitates an ideal breeding site for tiger and yellow-fever mosquitoes, and when an egg-laying female enters to lay, she is caught on a sticky card rather than allowed to reproduce. Because it targets gravid, egg-seeking females instead of host-seeking biters, it works by interrupting the next generation rather than clearing the mosquitoes bothering you right now. It performs best deployed in numbers and as the only breeding site available, run continuously through the whole season, and a double set runs about eighty dollars with no running costs. A single trap in one yard gives limited relief, the payoff builds over weeks and scales with how many neighbors also deploy, and it does little against species other than Aedes.
Scorecard
Expand any pillar to see exactly why it scored what it did.
Effectiveness45%31This is a trap, not applied to skin: it lures host-seeking mosquitoes with CO2, heat, and scent and captures them, thinning the local biting population by roughly 40-65% when deployed the way the field programs that validate these traps use them: well placed, run continuously, and more than one unit for a whole yard. A single unit does considerably less. Its job is to thin a yard's mosquito population over time, and it works slowly as that population turns over. Results swing widely with placement, competing hosts (nearby people and pets pull mosquitoes away from the trap), and whether you run it all season. Scored on how well it does that job deployed as intended, with a light temper for the real-world swing in placement and competing hosts (lower confidence).
This is a trap, not applied to skin: it lures host-seeking mosquitoes with CO2, heat, and scent and captures them, thinning the local biting population by roughly 40-65% when deployed the way the field programs that validate these traps use them: well placed, run continuously, and more than one unit for a whole yard. A single unit does considerably less. Its job is to thin a yard's mosquito population over time, and it works slowly as that population turns over. Results swing widely with placement, competing hosts (nearby people and pets pull mosquitoes away from the trap), and whether you run it all season. Scored on how well it does that job deployed as intended, with a light temper for the real-world swing in placement and competing hosts (lower confidence).
Evidence & honest claims25%26No published studies in our library directly support this product's active ingredients at their concentrations (base 20). Of 3 marketing claims audited: 1 strong, 2 moderate, 0 weak, 0 unsupported (+6).
No published studies in our library directly support this product's active ingredients at their concentrations (base 20). Of 3 marketing claims audited: 1 strong, 2 moderate, 0 weak, 0 unsupported (+6).
Safety15%75This is a standalone trap, not applied to skin, so there is no dermal exposure and no pesticide vapor or smoke to breathe. Because it lures mosquitoes with CO2, heat, and scent rather than zapping everything nearby, it is far more selective than a bug zapper and does not kill large numbers of harmless or beneficial insects. It burns a small propane cylinder, so run it outdoors and follow the fuel-handling instructions. Place it away from where people gather so it draws mosquitoes toward the trap, not toward you.
This is a standalone trap, not applied to skin, so there is no dermal exposure and no pesticide vapor or smoke to breathe. Because it lures mosquitoes with CO2, heat, and scent rather than zapping everything nearby, it is far more selective than a bug zapper and does not kill large numbers of harmless or beneficial insects. It burns a small propane cylinder, so run it outdoors and follow the fuel-handling instructions. Place it away from where people gather so it draws mosquitoes toward the trap, not toward you.
Transparency15%50This product is a device with no repellent formula to disclose, so it is neither credited nor penalized on ingredient transparency (neutral 50); its claims are audited under Evidence.
This product is a device with no repellent formula to disclose, so it is neither credited nor penalized on ingredient transparency (neutral 50); its claims are audited under Evidence.
Every pillar is scored from published rules. Read how we score.
Coverage & effectiveness
This is a trap: it lures host-seeking mosquitoes with CO2, heat, and scent and captures them, thinning the local biting population over time. It works slowly across a yard rather than protecting you on the spot, and results depend heavily on placement and running it continuously.
Mosquitoes
EstimatedModerate- Coverage
- No proven range
- Fewer bites
- 40-65%
The band shown reflects proper deployment rather than a single trap in one yard. Used the way field programs use it, meaning two or more traps, well placed, run continuously and ideally the only breeding sites in the area, mass deployment removed roughly 65% of gravid Aedes in a Brazilian study, with lower Aedes albopictus numbers and biting in high-coverage US neighborhoods where over 80% of yards participated. A lone trap does considerably less, because it only interrupts the next generation of egg-laying females and its effect builds slowly over weeks and depends heavily on neighborhood adoption. It also does little against non-Aedes species, so treat it as a season-long, community-scale control tool alongside emptying standing water and using a repellent for on-the-spot protection.
Ingredient disclosure
This product is a device with no repellent formula to disclose, so it is neither credited nor penalized on ingredient transparency (neutral 50); its claims are audited under Evidence.
The manufacturer does not publish an ingredient list for this product.
Claims audit
What the marketing says, versus what the evidence supports.
“Each trapped female means 50-100 fewer mosquitoes will hatch in the next generation.”
EfficacyModeratePlausible given Aedes fecundity, but a per-female arithmetic argument, not a measured yard-level bite reduction.
“Passively catches egg-laying tiger and yellow fever mosquitoes with no power, CO2, or insecticide.”
EfficacyStrongMechanism is well documented in peer-reviewed literature.
“Effective backyard tiger mosquito control.”
EfficacyModerateSupported for Aedes at adequate trap density and coverage; effect on a lone yard is modest and species-specific.