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Knowledge to Grow by Karen Weiland - Animal Damage

There is a lot of work that gardeners put into planting and caring for trees and shrubs in the landscape. One of the most annoying things you can see in the spring is plants that have been gnawed by mice or chewed on by deer and rabbits. There are a few things you can do this fall to help protect plants from winter time feeding by animals.

Nutrients and water are shuttled through the plant in the bark, so when it is chewed off the plant suffers. The more a trunk or branch is “girdled” (bark being removed) the less chance the plant has for survival.

Mice tend to live in tall grass or mulch around plants, so an easy fix would be to keep the mulch away from the trunk of a tree and to mow down the tall grass. Mouse baits can be used but it is best to keep the bait contained in a small box with a one-inch opening or an empty soda can so that larger animals and children cannot get to it. It is also possible that pets will get sick or die from eating a bait-killed rodent.

Rabbits will walk on compacted snow and will do their damage up higher on the plant. To protect your plants from them you can wrap the trunk with tree wrap, a plastic tree guard or make a cylinder of hardware cloth mesh. If using a wire mesh it should extend beyond the trunk by about an inch all around and be about 18-24 inches above the snow level. If possible affix the mesh to the ground with six-inch wire ground staples. To keep mice from digging under the screen, bury it a few inches into the soil. Scattering dried bloodmeal or mothballs will discourage rabbits in a small garden area.

If you have several trees or shrubs to protect, there are taste and odor repellants that you can use as well. The downside to this is that if the rabbits or deer are hungry enough they will eat the bark anyway just to stay alive. These repellants work by being sprayed on the tree or shrub. This will have to be done again after a rain. Soak some old rags in the repellant and hang them on the plants, too. Such smells work by interfering with the deer’s acute sense of smell and so of smelling potential danger nearby.

If all else fails you may have to resort to using fencing. It is the most reliable deer control solution, but not always the most practical or aesthetically pleasing. They are good jumpers and it is commonly recommended to use eight foot high fencing to keep them out. With individual fruit trees or shrubs you can place stakes around them then wrap with mesh deer netting.

As always, Happy Gardening!

The Purdue University Cooperative Extension Service can be reached at 499-6334 in LaGrange County.