in this universe, you could probably market "yukkuri proof" plant pots that are identical but weigh slightly more.
kind of reminds me too of that Nell Speed story on the google group where hordes of yukkuri beseige a house by just hurling themselves at the walls of the house one after another
As a society besieged by pests like yukkuri, I cant help but wonder why the hell hydroponics and upside down growing isn't popular. It would keep the plants out of their reach and taunt the little bastards too. Can't claim the "mr. Vegetable grows in the ground on their own" if they're not in the ground.