Martin wrote:

snipped

If OP's carrot fly killing product smelled of mothballs it could have been
Aldrin. The reasons why it was eventually banned were given here in 1970.
http://exacteditions.theecologist.or.../308/6415/3/29
The name of the powder I used years ago was called "brimophos", or maybe
"bromophos", if I remember correctly.
It was suitable for use against carrot fly and I think, cabbage root
fly.

It was effective I seem to remember, but is now banned.

Peter

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