KSL GREENHOUSE

Preventing Deer Damage

May 21, 2016, 11:39 AM | Updated: Nov 7, 2019, 11:40 am

Quick Facts…

It is difficult to move deer out of areas where they are not wanted. A hungry deer will find almost any plant palatable, so no plant is “deer proof.” The two types of deer repellents are contact repellents and area repellents. Netting can reduce deer damage to small trees. Adequate fencing to exclude deer is the only sure way to control deer damage.

Although browsing deer are charming to watch, they can cause extensive damage by feeding on plants and rubbing antlers against trees. In urban areas, home landscapes may become the major source of food. Deer can pose a serious aesthetic and economic threat. Damage is most commonly noticed in spring on new, succulent growth. Because deer lack upper incisors, browsed twigs and stems show a rough, shredded surface. Damage caused by rabbits, on the other hand, has a neat, sharp 45-degree cut. Rodents leave narrow teeth marks when feeding on branches. Deer strip the bark and leave no teeth marks.

Management Strategies

It is difficult to move deer out of areas where they are not wanted. Not all strategies are practical for every homeowner. Frightening deer with gas exploders, strobe lights, pyrotechnics or tethered dogs typically provides only temporary relief. More practical management strategies include selecting plants unattractive to deer, treating plants with deer repellents, netting and tubing, and fencing.

Placement and Selection of Plants

The placement of plants in part determines the extent of damage. Plant more susceptible species near the home, in a fenced area, or inside a protective ring of less-preferred species. Table 1 lists plants and their susceptibility to deer damage. A hungry deer will find almost any plant palatable, so no plant is “deer proof.” Also, a plant species may be damaged rarely in one area but damaged severely in another.

Repellents

The two types of deer repellents are contact repellents and area repellents. Contact repellents are applied directly to plants, causing them to taste bad. Area repellents are placed in a problem area and repel by their foul odor. Repellents are generally more effective on less preferred plants.

Apply repellents on a dry day with temperatures above freezing. Treat young trees completely. Older trees may be treated only on their new growth. Treat to a height 6 feet above the maximum expected snow depth. Deer browse from the top down. Hang or apply repellents at the bud or new growth level of the plants you wish to protect.

A spray of 20 percent whole eggs and 80 percent water is one of the most effective repellents. To prevent the sprayer from clogging, remove the chalaza or white membrane attached to the yolk before mixing the eggs. The egg mixture is weather resistant but must be reapplied in about 30 days. See Table 2 for a list of commercially available repellents and their ratings against deer and elk browsing in Colorado.

Home-remedy repellents are questionable at best. These include small, fine-mesh bags of human hair (about two handfuls) and bar soap hung from branches of trees. Replace both soap and hair bags monthly. Deer have been reported to eat the soap bars. Materials that work in one area or for one person may not work at all in an area more highly frequented by deer.

Netting and Tubing

Tubes of Vexar netting around individual seedlings are an effective method to reduce deer damage to small trees. The material degrades in sunlight and breaks down in three to five years. These tubes can protect just the growing terminals or can completely enclose small trees. Attach tubes to a support stake to keep them upright. Another option is flexible, sunlight-degradable netting that expands to slip over seedlings. Both products are available from Colorado State Forest Service offices.

Paper or Reemay budcaps form a protective cylinder around the terminal leader and bud. They may help reduce browse damage. Budcaps are rectangular pieces of material folded lengthwise and stapled around the terminal leader.

Tubes placed around the trunks of larger trees will help prevent trunk damage. Tubes may not, however, protect trunks from damage when bucks use the trees to scrape the velvet off their antlers. Fencing may be required.

Fencing

Adequate fencing to exclude deer is the only sure way to control deer damage. The conventional deer-proof fence is 8 feet high and made of woven wire. Electric fences also can be used. Electric fences should be of triple-galvanized, high-tensile, 13.5-gauge wire carrying a current of 35 milliamps and 3,000 to 4,500 volts. Several configurations of electric fences are used: vertical five-, seven-, or nine-wire; slanted seven-wire; single strand; and others. When using a single strand electric fence it helps the deer to ‘notice’ that the wire is there if it is marked with cloth strips, reflective tape or something similar. Otherwise, the deer may not see it in time and go right through it.

Additional options include invisible mesh barriers, slanting deer fences, and single-wire, electric fences baited with peanut butter. The invisible mesh barriers are polypropylene fences of various mesh sizes, typically 8 feet high with a high tensile strength, that blend in with the surroundings. The baited fences attract deer to the fence instead of what’s inside the fence. They administer a safe correction that trains the deer to stay away. They are effective for small Gardens, nurseries and orchards (up to 3 to 4 acres) that are subject to moderate deer pressure. Deer are attracted by the peanut butter and encouraged to make nose-to-fence contact. Deer, like many wild animals, seem to respect and respond better to electric fencing after they become familiar with the fenced area. Additional information on fences and their construction can be found in Deer (Craven and Hygnstrom), available from Colorado State University Extension offices. (See references.)

KSL Greenhouse

Learning about gardening season from the USU Botanical Center...
Ryder Spotts

Your gardening season can be extended with these simple tips

Recently, KSL Greenhouse Show hosts Taun Beddes and Maria Shilaos explored the best ways to extend your gardening season.
2 months ago
subscription boxes for home - home maintenance...
Taun Beddes

The good and bad of garden catalogs

The Good and The Bad of Garden Catalogs One of my favorite things is getting plant catalogs in the dead of winter. I enjoy seeing all of the wonderful plants. I have noticed that other gardeners also love these catalogs but are sometimes disappointed when the plants they ordered fail. As with most things research […]
4 months ago
...
Carlos Artiles Fortun

KSL Greenhouse: The Art of Gardening

SALT LAKE CITY — Growing a garden can be a tedious task, especially if you do it in your own backyard as a hobby. If you are looking into inspiration for your own garden, look no further than Randy Blackburn’s garden. In the latest episode of the KSL Greenhouse Show, host Maria Shilaos went to visit […]
8 months ago
How to tell if the melon is ripe...
Carlos Artiles Fortun

KSL Greenhouse | How to choose the tastiest melon and know if they are ripe

Many people don't know how to choose the best melon from the store or garden, and how to know when they are ripe. Here, we've got you covered.
9 months ago
Park city trees...
Carlos Artiles Fortun

KSL Greenhouse: Conserving energy with trees

Conserving summer energy with trees is easy with the right kind of tree, which can also help warm your home in the winter!
10 months ago
Blossom end rot...
Carlos Artiles Fortun

KSL Greenhouse: How to prevent Blossom-end rot

Blossom-end rot is a disease affecting tomato, eggplant and watermelon fruits growing in Utah. Here's how to nip it in the bud!
10 months ago

Sponsored Articles

Prescription opioid...
Know Your Script

Prescription opioid misuse | How to protect your family from the opioid epidemic

Studies have shown that prescription opioid misuse has increased since COVID-19. So what do you need to know about these opioids?
...

Tax Tuesday: The Most Common Mistakes People Make When Filing Their Taxes

Fortunately, for most average earners, they will not end up owing overpayments received for the Child Tax Credit in 2021.
...

Tax Tuesday: How will last year’s child tax credits affect you?

Fortunately, for most average earners, they will not end up owing overpayments received for the Child Tax Credit in 2021.
...

Tax Tuesday: Key Information Before the Filing Deadline

Businesses can receive a credit of up to $5,000 per employee in 2020 and up to $21,000 per employee in 2021.
national heart month...
Intermountain Healthcare

National Heart Month: 5 Lifestyle Changes to Make Today to Keep You Heart Healthy

Heart disease is the leading cause of death for both men and women. One person dies every 36 seconds in the United States from cardiovascular disease
Joseph Smith Memorial Building...
Temple Square

The Joseph Smith Memorial Building is an icon of Salt Lake City | Why hosting an event at this beautiful location will make you a hero this year

Here's why hosting an event at the iconic Joseph Smith Memorial Building in downtown Salt Lake City will make you a hero this year.