This past August I returned from Karluk Lake to a rat problem. In early August when I left for Karluk Lake my potatoes were doing great, and I had even already harvested a few 'new' potatoes. So when I got back I was looking forward to some more 'new' potato meals. I was devastated to find my potato patch was a warren of rat tunnels, and the few plants I did dig up had no more potatoes under them. Chewed bits of potatoes abounded all around.
Worse yet, there were also rats in the house. I surprised one in the bathroom and it escaped down the hole for the heat pipe. It was time for a rat extermination jihad. I know from past experience that you got to get them all at once. If you set out traps and don't get them all at once you risk educating them about traps. They learn to avoid the traps. So I decided to wait until I got back from my most recent hunting trip, and then go on a full fledged rat extermination jihad.
So last weekend when I got back from the south end I bought a mess of rat traps and started to dig up the remaining potatoes. By harvesting the potatoes I hoped to eliminate their food supply. Imagine my surprise to find that the rats were largely gone. I only caught 2 HUGE rats (both over a foot long), and there was very little recent evidence of rats in the potato patch.
It got me thinking about Stuey reporting on a 'sick rat' by the potato patch that he saw while mowing the lawn back in August. While harvesting I also noticed that the rats had been chewing the tops of the potatoes not covered by dirt that had turned green. I've known for years that green potatoes are poisonous. Sunlight turns the potatoes green and creates the poison solanine. Once, back in the day, I thought not eating green potatoes was an old wives tale, and I got very sick. I had home fries made from partially green potatoes for breakfast and then went on a hike. I got horribly ill, threw up and felt very weak and disoriented - I had a hard time making it home! Could it be that the 'sick' rat Stuey saw had been eating the green potatoes and was stricken with solanine poisoning?
So I googled 'rats and green potatoes' and found a very interesting article (click here for article). It seems green potatoes really are hell on rats. In particular on pregnant females whose litters fail after a diet of green potatoes. So maybe that's why I did not catch any small rats in my traps. Usually when trapping rats you catch mostly the small inexperienced ones. I only caught two HUGE rats - the ones that are usually the hardest to catch. This indicates to me that there are not very many, if any, small rats around my house.
Anyway, I also discovered that I still had plenty of potatoes and that some of the red potatoes had even produced new potatoes to replace the ones eaten earlier in the summer. I figure the rats got about a third of my potato crop, but hey I'm willing to pay that price if it also partially exterminated them. It's also worth mentioning that I am very much against using rat poison because of the potential for harming dogs and rats dying in the walls. But I don't see how green potatoes could harm my dogs? Maybe next year I'll mound my potatoes as usual (to keep them buried so they don't turn green) but put a few on purpose on the surface to turn green for the rats to find.
Patrick
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| Potato turning green in the sunlight |
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| some rat chewed potatoes |