> An oversimplication would be to liken it to barbed wire. A more apt explanation would be to liken it to diatomaceous earth vs. pesticides. Insects can develo

> An oversimplication would be to liken it to barbed wire. A more apt explanation would be to liken it to diatomaceous earth vs. pesticides. Insects can develop resistance to poisons, but when they cross diatomaceous earth it pierces their waxy exoskeleton coating and causes them to lose moisture, dry out, and eventually die... and evolution hasn't found a way around that yet.