Zeedman
Garden Master
Chewing off plants at the ground is one of the reasons voles can be so frustrating. That, and their often overwhelming numbers.@Zeedman- I was impressed with your vole trapping, I need to do that but don't know how. What kind of trap and bait do you use, just the apricots? My problem with traps has been that I have caught birds instead, baited with peanut butter, which is heart-breaking. I tried one rat snap trap at the mouth of a vole tunnel and put it under a bottomless bird cage so nothing could get it above ground, but it seems slugs or something ate the peanut butter and I didn't catch anything. My main defense has been putting lava rock in my planting trenches, and cayenne pepper, and this year when they were chewing off my pole bean stems at the ground I poured castor oil and dishwashing liquid down some holes and along the rows and it did stop that.
The traps I use are plastic snap traps, with bait cups. They are weatherproof, and last for years outdoors. The best ones I've tried are the Kness, my main trap. Bought 30-40 of them in 2005-2006, still have most of them:
http://www.kness.com/store/pc/Snap-E-Mousetrap-3p4.htm
Tomcat makes one which is similar, but they are actually too sensitive... too many false triggers. Even a rain drop will set one off.
The most effective way I've found to deal with a vole infestation is to "chum" with pieces of dried apricot in the affected area (taking a lesson learned from salt water fishing), then a day or two later, lay out a lot of traps at once. I like using pieces of dried apricots as bait because you can pack them tightly into the bait cups, they don't fall apart after a rain, and the strong scent attracts rodents. Place the traps under dense foliage (where the mice make their runs) and mark the locations with survey flags, so you can remember where you put them. Check the traps as necessary at least daily (especially after the first day) and remove dead mice promptly. Don't be surprised if you find half of the traps have mice after 24 hours! Most of the mice will be trapped in about a week, but watch for others that might move in from surrounding areas... or just bait those areas proactively, which is why I have so many traps.
There were years where I caught a few birds too, probably because some of my traps at the time were easily visible. Haven't caught a bird in years through, since I began hiding the traps under dense foliage.