I doubt very many people have ever heard or seen a “tank mix.” Simply put, it is a mix of several crop chemicals used together to control a variety of weeds. I have not looked into a swirling mix of chemicals in a crop spray rig for probably 20 years—that’s about how long it has been since we have used any herbicides on our farm.
It may look different now, new chemicals, perhaps new colors and new toxic smells. I remember it as a sulfurous yellow mix of rising spreading plumes of chemicals, circulating and mixing together in the tank. The smell was literally breathtaking and the toxicity likewise. (That’s why it’s recommended that the applicator wear breathing protection and a Hazmat suit.)
When people ask me why we switched to organic farming, that swirling yellow tank mix always reappears in my mind. How did I ever rationalize putting that stuff on my fields?
When genetically modified (GM) crops were introduced commercially in 1996, farmers were told that Monsanto’s “Roundup Ready”(RR) technology would make crop production easier, safer, and “one spray was all they’d ever need.”
Roundup would be a safer, more effective replacement for all those chemicals farmers who were currently using their tank mixes, they told us. With Roundup as the cornerstone of GM crop technology, the promise was safety. We’d have no more worries about weeds, and it would be eternally effective, so there would be no more need for tank mixes.
While I really don’t consider any pesticide safe (after all—they are poisons), Roundup was probably less toxic, perhaps less carcinogenic, and perhaps less of an endocrine disruptor than some of the chemicals it replaced. Perhaps.