Blister Beetles love blooming alfalfa and/or weeds. When you cut these fields with a mower-conditioners you cut the hay and crimp it all in one process. This crushes and kills the beetle. So when you bale the hay you bale the beetle into the bale. The cantharidin in the bodies of living or dead blister beetles can be toxic to horses, sheep, and cattle. It is just more toxic to horses in lower doses. While low doses will put a cow off feed it will kill a horse. The cantharidin is very stable and remains toxic in dead beetles for a long time so even if the hay is eaten months later it is still poisonous.
On the other hand if you cut the hay; avoid running over it with the tractor wheels; and let it lay for 24 hours before conditioning it the live beetles will find better places to forage. This is especially true if you leave a standing; uncut; row in the field or around the edge of the field.
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Today's Featured Article - Restoration Story: 1964 JD 2010 Dsl - Part 2 - by Jim Nielsen. Despite having to disassemble the majority of my John Deere 2010's diesel engine, I was still hopeful I could leave the engine-complete with crankshaft and camshaft-in the tractor. This would make the whole engine rebuild job much easier-and much less expensive! I soon found however, that the #4 conrod bearing had disintegrated, taking with it chunks of the crankshaft journal. As a resul
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