"Andrew Hickley" wrote
I don't know what the active ingredient was, but I used to have some
spray on/water on powder that would kill off the massive caterpillar
attacks that denuded my brassicas. Does anyone know of a similar product?

Yes, it was probably the BT [bacillus thuringiensis] stuff that I also used,
totally organic and worked a treat. It is a disease of caterpillars you
spray onto the plants and once they eat it they die after a couple of days.
Probably unable to buy it now although I have some left.

--
Regards
Bob Hobden
17mls W. of London.UK