"Dave -Turner" writes:
from what ive read - mix some borax powder with some powdered sugar, they
take it into their nests and eat it and get food poisoning. interestingly
borax is used in some French caviars, but despite its use as a pesticide its
LD50 is similar to that of table salt. I still wouldnt wanna eat it though

My Mum has an early well-worn recipe book, the collected wisdom of late 19th
through to mid-20th century Australian women. Along with recipes for jugged
hare, making your own vinegar from plums, and making bread using wild yeasts
harvested from the air and cultured on mashed potato, was a method for
keeping milk for up to 3 days without refrigeration. It involved disolving
borax (at quantities something like a tablespoonful per pint, from memory)
in the milk.

Evidently, it must work without poisoning the consumer, though I've never
tried it.
--
John Savage (my news address is not valid for email)