Franz Heymann wrote:

How highly diluted?
How many teaspoons per pint?

I've never measured it. It's a half litre spayer and I sqirt no more
than 2 table spoons if there are a good number of insects to kill off. I
then spray only the infected areas as close as possible to cover and the
force wipes some of them off. As soon as I see any other insects such as
ladybirds, spiders or non-green fly really I stop or aim away from them.

Kev,