With November here, we can expect cooler temperatures and more interactions with wildlife. Often times these interactions are with the deer, rabbits, and voles chewing on our plants. These pests can cause a great deal of damage and can be controlled in our landscapes to protect our plants over the winter months.
Deer can really be a nuisance to plants in all seasons of the year. They can chew off the ends of small twigs and bucks can rub their antlers on smaller trees, injuring the bark. I get a lot of calls from people who want to know what the silver bullet is to reduce the amount of damage that deer do to our vegetable gardens and trees and shrubs each year. The sad truth is that there is no real cure for deer damage to our plants. Exclusion is going to have the biggest impact on deer damage to our plants
Excluding deer from our plants is sometimes a difficult task, but it can be done, in smaller areas, like around acreages. There are fences that can be utilized but they need to be at least 8 feet tall. Another type of fence that has proven quite effective is an electric fence that has small squares of aluminum foil coated with peanut butter, placed sporadically on the fence. This technique is used to eventually train the deer to stay away from the fence, even if the electricity is not turned on. This electric fence technique should not be used in an area where a child or a pet can get to the fence so that they do not get electrocuted. The commercial spray repellants available for deer are not effective.
Rabbits can also be quite a problem in areas where deer are a problem. Rabbits will chew on small plants. In the summer they chew many of our plants off at ground level, and in the winter months they gnaw on the thin bark of young trees to feed on the green inner bark areas. Rabbits can be excluded by surrounding a garden or landscape area with a low fence, at least 2 feet tall. Cylinders can be placed around young trees to reduce damage during the winter. Habitat modification is another good way to control rabbits, remove brush piles, debris, and other cover that rabbits prefer to live in during the winter. As with deer, the commercial spray repellants available for rabbits are not effective.
Voles are another species of wildlife that can do a great deal of damage to our plants in the winter months. If we receive enough snow cover, voles may feed on trees and shrubs, they will also gnaw on tree bark and roots, and potentially kill plants. To help prevent this, keep tall grass and weeds removed from around the trunk of trees and avoid mulch layers deeper than three inches. Placing hardware cloth around tree trunks will prevent vole feeding.