Wine makers in West Texas are reeling from herbicide drift injuries on their grapevines, an emerging threat to the state's $13 billion a year industry, NPR's Morning Edition reported Tuesday.

The damage likely originates from use of Monsanto's dicamba and Dow's 2,4-D formulations on nearby cotton fields. The companies sell cotton seeds that are genetically modified to withstand applications of the weedkillers. If farmers use the products improperly, the highly volatile chemicals can get picked up by the wind and land on off-target crops. When exposed to the herbicides, the leaves on non-target plants are often left cupped and distorted.