I tried the water-filled bag traps from my local garden store (the bags with an attractant where the yellow jackets crawl in but can't find their way out), and although the traps seemed to accumulate a lot of yellow jackets, my problem persisted. I found this product had been mentioned by a professor from UC Davis and decided to give it a try. I tested several kinds of bait and found they liked fish/shrimp cat food. I mixed a half-recipe, only 6 oz to start out and replaced it after 2 days. After 4 days the yellow jackets were gone. The bait stations are a little messy (and smelly!) to clean out afterwards, but I can't argue with the effectiveness. My wife and I can sit in the backyard again. As was mentioned in the FAQ, it can be a challenge to thoroughly mix so little poison with the bait. Using cat food helped because it was smooth and not lumpy. I also used a little extra water: I added the poison to a teaspoon of water, stirred, then carefully sprinkled the poison all over the bait, then thoroughly mixed for several minutes. So little poison is used, the supply should last for years. I give the product 5 stars for effectiveness but 3 stars for the care needed in mixing the bait, and the messy cleanup. 4 stars overall. I definitely recommend this product and will absolutely use it again next year.
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