You can see signs of Monsanto’s latest belly flop in stricken farms: The leaves are gone from the acres of peach trees on Bill Bader’s orchard in southern Missouri, and soy fields in eastern Arkansas and western Tennessee are curling up and dying.

A lot of the blame falls on Monsanto’s new genetically engineered soybean, Xtend, which is having a terrible, horrible, no good, very bad roll out this year.

To explain what’s happening we have to back up. Farmers have been using crops that tolerate the herbicide glyphosate (often sold under the brand name Roundup), and for years it worked amazingly well: Farmers sprayed glyphosate and the weeds died, while the crops thrived. But then some weeds stopped dying, because nature had caught up; the weeds evolved to tolerate glyphosate.