[OJFord]

> individually the chemicals are fine, maybe they aren't in combination

I'm sure I've heard colleagues (more on the 'ag' side of the 'agtech' company) mention that, things that can't be used in combination, but I can't see where it would be listed (or find an example where it is) in the pesticides register: https://secure.pesticides.gov.uk/pestreg/prodsearch.asp

I'll ask next week if I remember, curious now, since it seems fairly obvious? Just like you can buy all sorts of safe household & garden chemicals for cleaning etc. but which if you know what you're doing (I don't) and want to (I certainly don't) can be used to construct very not-safe things.