[Gene Howe]

Travis,
That's good to know.
I plan on using a bunch of walnut in the near future and I have some areas of graveled drive where I'd like to prevent next spring's crop of weeds.
As to horses, riders around here tell me it also causes a hoof infection and often a rash if they lay in it.
It causes me to sneeze, but I love the smell.

I work with walnut on occasion and have had a few problems but not with people. I have a local farm that takes all my full dc bags to use as bedding. A few years back the farmer had lost a horse due to a respratory illness. Come to find out the walnut dust is very dangerous to horses. Now anytime I work with walnut I segregate it and purge the dc system after use. I also had an experience where I dumped my sawdust in a field. I had about 8 55 gal bags full of mixed dust that included walnut. It was quite a pile after dumping it all out so I decided to till it in and spread it out a little to let mother nature do her magic. After about a year I noticed there was nothing growing where all the dust had been dumped so I just figured it had packed down and was acting like a mulch. So I tilled it all up again and threw some fresh grass seed down. The grass started to come in and I didn't really pay much more attention to it. Later that year the 2 trees growing in close proximity to where the dust was dumped died and the grass was all dead. I now take anything with walnut dust to the dump. It has been 2 full summers since the dust was dumped in the field and as of this fall it is still a barren area. I am going to try to plant some grass again this spring. There weren't even weeds growing there though. We walnut trees all over up here and grass doesn't grow under any of them. Makes a guy wonder.