Vole Test Plots Results

Last fall, I established some test plots using Milorganite fertilizer for vole repellency. You can read about it HERE In mid-April after snowmelt, I was able to observe the results from those test plots. This past winter season was a low pressure vole year, meaning the voles were not as active as other years. The main reason for this was the lack of snowfall and the lack of duration of what snow was recieved. Voles are primarily active under snowcover. No snow cover equals no voles. There was some snow cover however and we did see some positive results with the Milorganite use. The rate used for the test plots was 1#/N/M. Take a look at some of my findings below.

Voles active in the area, but the Milorganite plot stayed clean from any damage.

In this test plot we had heavy vole damage on two sides, but the plot was generally clean.
The arrow shows vole entry into the plot from the right side, but it appears there was
repellency as very minimal damage occurred.
  

Another observation from the test plots was spring green-up. At the time of the test plot observations, soil temperatures were in the high 30's. In the photos below you can already see some spring green up occurring even with these extremely cold soil temperatures.

Initial spring green-up noticed immediately after snowmelt with soil temperatures in the high 30's.

Although it wasn't a high pressure vole year, there were certainly some indications that Milorganite can be effective for vole repellency. This fall, I plan to establish some new test plots to study this repellency further. Stay tuned.