The Four Month Trap

Today I’m publishing directions for making a trap that does not need to be refreshed for four months.  To me, this is a big deal.  I’m managing about 25 traps, and the number keeps growing!

It’s an experimental trap, based on research papers that have studied longer lasting chemicals – bifenthrin and spinosad.  Bifenthrin is another pyrethroid (man-made pyrethrin, which is a chemical produced by chrysanthemum plants), and spinosad, which is a chemical produced by bacteria in soil and which is approved for use in organic gardening.

If you make one of these traps, you will only need to check it every few weeks, mostly to see that the water has not evaporated, and that no animals have knocked it over or climbed in.

Please send feedback if you build these traps, to


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