How do I make the perfect rat poison from plants I can gather innawoods? I have rats in my house and it's illegal to sell poisons here, so I'm thinking of making my own from plants. What kind of plants are strong enough for this, how do I extract the poison and how do I preserve the stuff so it doesn't go rancid in the bait? I live in Scandinavia and I'm going to use local plants but can stretch myself to use garden plants if anons recommend them. Any /out/ or historical ideas on how to eradicate rats are also good.