Thanks guys for posting up. My son is a commercial bee keeper and he and I have had many discussions over spraying herbicides at the farm. As per his request to me, "if you need to or have to spray herbicides, spray in late evening or at night". And after all I have read, I think its most likely the safest way to use a herbicide when it comes to bees or other pollinators. And one of the reports above listed Vinegar as a herbicide as a low risk.
