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We used this on our front yard right before we had a BBQ and we were all surprised at how well it worked. We used no mosquito repellent on ourselves and none of us had any bites at all.
We’ve had a very rainy summer so I can’t really vouch for whether it last for all 3 weeks it says it does, but I know that it was a week before our first rain after using it and I hadn’t seen any mosquitoes during that week and I didn’t see any after that first rain. We did have several rainy days in a row, as we’ve had all summer, so that greatly diluted it and I did start seeing those pesky bugs again. We used it in mid-July and in Missouri that’s during the peak mosquito time.
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Thank you to Terro for sending us sample product free of charge to base this review upon.