Lambda-cyhalothrin is a very good chemical and I especially like it in a micro encapsulated formulation. I decided to switch to this chemical over four years ago for controlling Asian Ladybug Beetles, Brown Marmorated Stink Bugs, and Kudzu bugs. It has worked better than any other chemical we had been using up to that point. If this chemical continues to perform like I believe it will we will continue to use it. Originally we used another brand and based off of the claims from their cut sheet I had several questions and called the factory to speak with the plant chemists. The plant chemists answered the first two questions. When I asked about the longevity claims based off of their datasheet inquiring if their Polymer Encapsulation media contained an ultraviolet inhibitor to get that long of a life he started screaming about not revealing any proprietary information and slammed the phone down. It was an honest question and guess I got my answer. Spiders are always a problem even with spraying chemicals and webbing. Unless the chemical gets on the spiders body it does no good. The spiders just continue to walk through life on their stilt legs with no effect. Since this product is a micro encapsulated formulation we have started using it for spider control hoping that the spiders will bump into one of those millions of little landmines left behind after the water evaporates and get a dose of chemical helping to control their numbers. Having earned advanced degrees in both chemistry and business I look at the Pest Control products we use in the company from several viewpoints. Those include: the chemical makeup, effectiveness on targeted pests, toxicity to pets and people, and also cost/benefit. It is tough sometimes to separate the chemistry side from the business/service side. I hope this has been of benefit to you. Thank You, Don

I purchased this with the intent of eliminating a scorpion infestation (along with all the spiders, crickets and cockroaches!) this product was fantastic! Not a single scorpion in sight within the past month and lots of DEAD bugs.