Or it could have been a minimum wage idiot who put the wrong chemical in the lines.
Around here some idiot sprayed 24D on a windy day and destroyed about a 100 acres of cotton, thankfully, the vineyards near there don’t seem to be hurt. The really stupid thing about it is that it was fallow land and they could have easily disked the weeds down.
Heck, you can get 2,4-D drift on nearly windless days. I learned that the hard way. Just use the ester formulation instaed of amine, spray in the AM on what will be a hot (90F) day and it vaporizes then drifts. Knocked back alfalfa a quarter mile away.