Voles wreak great damage to vegetables in mid-summer, too. Entire plants die off if the roots are gnawed off. Voles can be identified by their tunnels. These tend to be relatively flat, just below the ground surface and the overlying soil is slightly broken upwards. In a densely planted vegetable garden, these tunnels are often not seen but the damage is very noticeable when the plants suddenly start to wither and die. A vole trap is an effective means of tackling voles.
A particularly convenient method of combating voles is to use granulated bait. Ask at your garden centre for a suitable product.