Meanings of virulent poisons in English

Coal gas and illuminating gas are two virulent poisons to plants.

The most virulent poisons are the most sovereign remedies, when given in due proportion.

One little sip of this antidote would have rendered the most virulent poisons of the Borgias innocuous.

Powerful and sovereign medicines, which are, of necessity, virulent poisons also, are kept in a locked cabinet.

I earnestly urge that virulent poisons like Paris green, London purple, etc., never be used on fruit or edible vegetables.

We nourish within ourselves microbes which secrete very virulent poisons, and when those poisons are too much for us-well ,wegrow old.

'That priest can dress the most virulent poisons in the most frightful sacrileges.

Medica Consist of Virulent Poisons?

"Like many barbarians," continued Craig, "the Ainus from time immemorial have prepared virulent poisons with which they charged their weapons of the chase and warfare.