Horses have a digestive system quite different from that of a ruminant; this
is maybe a major factor in their ability to poison themselves easily.
The toxic factor in Locust leaves, seeds, & foliage is not what's
responsible for the rot resistance of the wood. As I've noted, deer love the
tree; they're a major problem in establishing a planting.
The mere fact that is
doesn't decay easily (i.e. doesn't get eaten by microbes) should be an
indicator of toxic / preservative substances.
And, as Heide indicated, Black Locust coppice regrowth is indeed more toxic.
And thornier. To minimize these problems, don't feed regrowth to animals.
My question remains: What tree species do people recommend for rot-resistant
timber in cool temperate zones? I don't want to rely on big companies
providing me with toxics just to have a fence post that lasts longer than 5
years.
-Rick
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