Please review this

Please review this
Meant to post this in the fall I noticed that all the weeds between the grape plants were dead I asked a long time worker
a(possible owner)the person said they use herbicides and also noticed that all post for wires holding grape Vines were wolmanized which I have read can leach into the ground Not good if this is true, is this a fact please review
And not all winery's up there are doing this