No. Large size monoculture should rely on preventive methods to control weeds, such as always covering the soil. It's even possible to plant seeds on an existing live cover.

No plowing, no pesticides, just preventive coverage and good tools.

In the long run, those large monocultures don't make sense anyway.

Robots can be great for a lot of high maintenance, Human intensive, high value cultures such as fruits, greens ...

I guess they could also help expand vegetables farms to non cultivated areas, in some autonomous ways.