This is a real-world example of evolution, and whether or not it’s showing up in textbooks, it is going strong in our conventional agriculture. More than 500 species of insects and mites now resist our chemical controls, along with over 150 viruses and other plant pathogens. More than 270 of our recently developed herbicides have now become ineffective for controlling some weeds. Some 300 weed species resist all herbicides. Uh-oh, now what?
