If you have a working method to maintain crop yields while eliminating all pesticide use and not increasing cost significantly, I think there would be a lot of people interested, and probably a lot of money to earned.
If you have a small machine that constantly plucks weeds, you don't need herbicides.
Not sure about pesticides.
Purslane is really annoying.
> Pesticides are substances that are meant to control pests or weeds. The term pesticide includes all of the following: herbicide, insecticide, insect growth regulator, nematicide, termiticide, molluscicide, piscicide, avicide, rodenticide, predacide, bactericide, insect repellent, animal repellent, antimicrobial, fungicide, disinfectant (antimicrobial), and sanitizer.