I have compiled quite a large file on this. Unfortunatly, in the US there are not alot of studies that have been conducted by sources other than the manufacturers(ugh, I hope I spelled that correctly). But I have been able to find studies done in other countries
The main ingredient of Glystar is glyphosate, which in itself is not necessarly toxic, when other ingredients are mixed in ie, the surfactant, that is when we run into problems. It seems that the combination and dose is the problem.
The spray was put down directly where I feed, without my knowledge. In fact, it was done three times. The woman used 5 gallons of glystar in approx. 300 gallons of water to treat less than 1/4 acre.
My horses are exhibiting muscle wasting, poor hair coat, inability to gain weight(they are 14 months old and are the size of 5 month old colts), lethargy, bouts of diaharia. The blood work shows liver, kidney problems. All have been fed the best hay(tested), have had mineral blocks with selinum and wormed on a regular basis.
I have lost one mare and am getting ready to send the three foals off to the University.