In message
, NT
writes


snippage..

Permethryn is a synthetic product used as an insecticide

None of these products are anything like as effective as the ones that
the EU has removed from our arsenal of AIs

Best protection is to keep out water by design.
Chris

cheers chris. Is there anything one can add to these preparations to
improve their effectivness, eg a copper salt or cu powder?

Boron.

regards

--
Tim Lamb