Yeah, but if you can do something like roll this over your entire field once a week or every couple of weeks, it won't matter that they're not dead. All you rea

Yeah, but if you can do something like roll this over your entire field once a week or every couple of weeks, it won't matter that they're not dead. All you really need is for them to not be able to thrive and outcompete your corn. Starving them of light by cutting off their visible bits periodically will do the job just fine.