Bush Honeysuckle: Enemy of the State. Does that sound dramatic? That's the tone taken by a current state-wide campaign in Missouri to spur property owners to eradicate bush honeysuckle encroaching on their property. You may have seen one of the billboards along I-70. Hopefully it works!
And check out their video: Whoa! A little drama may be needed to call people to action. The unique natural heritage of Missouri is indeed at risk. (Not to mention the eastern quarter of Kansas.) We've seen the effects honeysuckle can have in Roanoke Park and many other KC metro area parks and natural areas. Areas that have been severely infested by bush honeysuckle have their biodiversity greatly reduced and their native plants crowded out. Tree seedlings, especially of oak trees, have a hard time getting started under the dense shade of the pervasive honeysuckle thickets. Spring ephemeral wildflowers are killed out. Add a ground cover of purple wintercreeper (from China) and the environmental damage is multiplied. Without the native plants, shrubs and trees as host plants for caterpillars, birds have much less to feed their young. See BringingNatureHome.net to learn all about the vital role native plants play in our local environment, ie, your back yard. It's bad out there folks, but with a little effort we can turn the tide. Not just by cutting honeysuckle and wintercreeper, but by planting the native plants, shrubs and trees that they're crowding out. Not just in the park, but in your home garden and any other land you manage. See The Living Landscape for inspiration.
None of this is news to the neighbors cutting bush honeysuckle from Roanoke Park. Obviously we whole-heartedly endorse the campaign Stop-Honeysuckle.org.
Beneath Roanoke Park's 12' high layer of bush honeysuckle were found many patches, in some cases a continuous carpet, of Wintercreeper (Euonymus fortunei).
Click for a gallery of wintercreeper images.The problem is that wintercreeper outcompetes All native plants. ie, where wintercreeper lives, native plants die. Trees do not thrive. Without a wide variety of native plants and trees, our local insects, birds and animals cannot find the food and shelter they need to SURVIVE. Since wintercreeper and bush honeysuckle inhibit the regeneration of native plants and trees, they eventually form a monoculture and for local fauna, a food desert. Spring ephemeral wildflowers are completely killed out where wintercreeper and bush honeysuckle rule.
The goal of Roanoke Park's Ecological Restoration Plan is to maximize the ecological richness of the slopes of Roanoke Park for the benefit of park visitors and neighbors. Foreign invasive plants such as wintercreeper and bush honeysuckle are incompatible with that goal since they degrade diversity and inhibit the woods' natural self regeneration.
Canada Wildrye on the "Valentine Slope."Park volunteers are attacking the wintercreeper in targeted areas. It's almost completedly been removed from the "Valentine Slope" backing up to Southwest Trafficway, replaced by a very attractive seeding of Canada Wildrye. A good deal has been removed from below Roanoke Parkway and West Roanoke Drive, where replacement plantiings are ongoing. And the Colemen Highlands Spring restoration is a new "beachhead" for wintercreeper removal north of Karnes. Much more remains to be pushed back and ultimately replaced, an endeavor sure to take many years.
In the home landescape setting, wintercreeper is only "evil" when allowed to run wild. If you have some on your property and you're keeping it trimmed and in check (preferably in an area bounded by edging or concrete), that's fine. Kudos to you for responsible wintercreeper ownership. But if you allow it to "creep" off your property, or if you allow it to grow up your trees and produce berries, Your Wintercreeper Is Doing Harm. Birds are eating the berries and bombing seeds into the park and neighboring properties. Do your neighbors and the environment a favor and cut all wintercreeper growing up trees or other vertical surfaces.
Alan Branhagen - Powell Gardens former Director.Wintercreeper rated "#1 - severe pest"Invasive Plants of Greater KC -Powell 2014.pdf
Larry Rizzo - Cofounder of Kansas City Wildlands, MDC Natural History Biologist (retired), Biologist with Habitat Architects. "Wintercreeper is probably the one species that is arguably worse than honeysuckle." - personal correspondence.“Go to Cave Spring (Historic Site) at Blue Ridge and Gregory and take a look at the woods,” Rizzo said. “It’s our version of kudzu.” - 2010 Kansas City Star article
Washington University - Invasive Plants of Missourihttps://pages.wustl.edu/mnh/invasive-plants-missouri
Leitzeger Road Ecology Center (St. Louis area)www.litzsinger.org/research/carpenter.pdfResearch showing increased numbers and variety of tree seedlings/saplings in areas where wintercreeper and shrub honeysuckle were being managed against versus an unmanaged control area.
St. Louis Audubon Society - Bring Conservation Home programhttp://www.stlouisaudubon.org/conservation/BCH/criteria.phpSilver Level - Wintercreeper removed from all vertical surfacesPlatinum Level - 100% wintercreeper removed
Missouri Dept. of Conservation - "Invasive. ...heavy infestations in woodlands around St. Louis and Kansas City."https://nature.mdc.mo.gov/discover-nature/field-guide/wintercreeper"Wintercreeper threatens native plants and natural habitats in open-to-shady and moist-to-dry locations. It can form a dense groundcover that reduces or eliminates native plant species. It depletes nutrients and moisture for native species and can smother and kill shrubs and trees."http://mdc.mo.gov/your-property/problem-plants-and-animals/invasive-plants/wintercreeper-control"Wintercreeper can cover the ground and vegetation and eliminate native ground cover species in mesic and dry-mesic forests. It is a serious potential threat because it spreads so rapidly and replaces spring ephemerals. The Shirling Sanctuary in Kansas City's Swope Park provides an example of a mesic forest that has been seriously degraded by the aggressive spread of wintercreeper."
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The main overgrowth of vegetation afflicting Roanoke Park is the non-native invasive bush honeysuckle* Lonicera maackii. This plant is native to Asia and was imported to our area as a landscape plant valued for it's fragrant spring honeysuckle blooms, fall red berries and utility as a screen. But alas, this plant has "escaped" with a vengeance, lining roadsides and invading parks and natural areas throughout Kansas City. Birds eat the berries and spread the plant near and far. Roanoke Park is not alone in suffering from an infestation but may be one of the spots where it can be effectively controlled with concerted effort. Control efforts are being undertaken in Hyde Park and Gillham Park and in parts of Swope Park and other properties where Kansas City Wildlands volunteers are at work. Homeowners and property owners are encouraged to remove it from their properties if at all possible.
Bush honeysuckle is detailed further in this excellent publication from the Missouri Department of Conservation: Curse of the Bush Honeysuckles! Identification and control measures are discussed and many suitable landscape alternatives are shown.
For controlling unwanted bush honeysuckle (Lonicera maackii) via cut surface treatments in forests. Tordon is selected for this project because it is shown to be effective and only requires a small dab applied sparingly and directly to to the freshly cut stem. Download Applying_Tordon_RTU.pdf for specific application instructions and illustrations as used by Kansas City Wildlands.