i have never heard of anyone dying from smoking buds from plants treated with this substance.
but thats not saying much, as ive also never heard of anyone that has successfully used this technique for breeding purposes....
i can see how the plant could be toxic with such high levels of Colchicine present... but what i was wanting was to create Colchicine treated parents, breed them, and then cross the f1'a with an ibl, and see what happens. however, with no proper analyzing equipment to test the end f1 hybrid product for levels of contamination, so I fear that for me, this is quickly becoming a pipe dream....
also colchicine can be found in medicine used for the treatment of gout.
extracting it, isolating, and then administering the roper concentrations though, is an entirely different story...