BASF PT Tri-Die Pressurized Dust Insecticide - Lambda-Cyhalothrin Crack & Crevice Treatment - 8 Ounce Can

Expensive, but worth it. I had used at least six cans of the regular wasp spray to eliminate a yellow jacket colony behind my siding. However, due to the location, I could not get good penetration. Also discovered a larger colony above the garage soffit, and the entrance was a tiny opening in the metal flashing, so the regular stuff would only kill a few at the opening. At first light I hit both nests with the Tri-Die. The tube made it possible to spray upwards under the siding and deep into the soffit cavity. By late afternoon there was zero activity at either nest. Hit both locations again the next morning for insurance. I bought two cans but only used about 1/2 of one can.

I had a yellow jackets nest Billy into a cushioned chair outside on my porch . I had tried a full can of the foaming stuff and the next day they were just as active! It didn't seem to get any of them! So I order this stuff in hopes it would take care of them (did not want to pay an exterminator!). I was a bit skeptical after reading the pamphlet which didn't include bees in it, other than saying it was bad for them as pollinators, but as many warnings it has, also hopefully. I was disappointed after checking the nest the next day and it didn't seem to make a difference. So I waited another day or so and when checking there was no longer any activity! Praise God! This did the trick! And the instructions for the area I had to spray (and all of the precautions) I only sprayed a single burst of one second to and in the hole! That was a tiny amount, esp compared to a whole can of the other two weeks prior, and it took care of the nest! This stuff works! It came sealed in a bag and thankfully had not leaked any out. I keep this outside my house for storage, with all of the warnings on it! Very efficient effective spray! Easy to use, but the precautions taken make it an ordeal, but worth it.

Product is amazing having tried many of the home store type sprays. Had a very large hive in the wall of a stairwell and got stung when walking outside so the yellow jackets had to go. Called some exterminators which was a total waste all wanted contracts and big fees. So bought this spray sprayed it last night and went back to spray again this morning and no activity in the hole Will spray one more time around the area it does leave a powder around the area you spray but no big deal that is way better than a ton of yellow jackets ! I found the spray tube to not be that helpful as I didn't want to be 6 in away but without the little stick that you're supposed to put in the sprayer and shoots probably 8 ft which was plenty for the job.

Worked well when used as intended. Had yellow jacket nest under vinyl siding and had to spray the area “ after sunset “ three times to kill them.

This product has three components that works upon yellowjackets and exterminates their nest: Pyrethrins: A naturally occurring chemical compound found in chrysanthemum flowers, which attacks the nervous system of the yellowjacket. When sprayed directly, the yellowjacket experiences paralysis and death. Silica Gel: A yellowjacket's exoskeleton requires moisture to remain functional. The silica gel additive serves as a dessicant. When the gel covers the yellowjacket, it sticks to the exoskeleton and dries it out, leading to the yellowjacket becoming dehydrated and eventually dying. Residual dust: Because this product is in dust form, this product should be sprayed upon and in the entrances and exits of the nest so that the dust spreads easily from yellowjacket to yellowjacket. The dust spreads further into the nest as the yellowjackets return, crawling in the entrance and spreading the dust from their bodies throughout the nest, eventually reaching the queen and exterminating her and her larvae. The residual effect saps the strength of the yellowjacket over time like a poison, and lingers long after the yellowjacket dies, thus affecting other yellowjackets until the nest is exterminated. I found that two applications was sufficient to exterminate a nest. I noticed after the first application, many yellowjackets were writhing on the ground, unable to fly, likely due to the paralyzing effect of the dust. The others swarmed out in a great and angry cloud. A few days later, I noticed that there was a mere fraction of yellow jackets as before. I sprayed more than last time in all entrances, determined to end this nest once and for all. This time, a much smaller swarm emerged; clearly, the initial application decimated the hive. Today, one day later after the second application, the nest is completely dead. Yes, I highly recommend this product for exterminating hostile wasps or hornets nests.

This is the only stuff I've found that will get rid of yellow jackets nesting in siding. Does not list them on the label, but it works for wasps and yellow jackets. Could not get to the actual nest, but was able to figure out their entry and exit points and sprayed them liberally. Goes on wet but quickly dry to a powder. Easy to use. Has about a 6 foot reach. Within 2 days there was no signs of wasps coming or going so if say it works great. Very much worth it over the other regular wasp and bee sprays.

I have been battling yellow jackets all summer long. They burrowed in above my porch ceiling where I can’t see the nest so I can’t get right at the nest. I’ve been spraying the liquid stuff in a can in the hole and all around. That kills the bees as they’re coming and going but was ultimately a losing battle. I finally stumbled upon this stuff and decided to give it a try. I sprayed the hole and inside the hole where the bees were coming and going. Less than 24 hours later no activity. The war has been won. This is the most effective bee killer I have ever used. No signs of bees anywhere. None. This stuff just works!

Don't get me wrong, the active ingredients in this product do work. In fact, it is highly effective. Having said that, it is extremely messy. I had white powder all over my hands, the customer's floor, etc. Won't be buying more. Effective, but messy.