by Rick Forrester
As part of the maintenance of the park, we remove Amur Honeysuckle (Lonicera Maackii), a very aggressive, invasive species. Originally from western China, it was grown in Chinese gardens before being cultivated at the St. Petersburg Botanical Gardens in Russia (1883). It then moved to Europe and was highly valued as an ornamental. Next, it was cultivated at the Dominion Arboretum in Ottawa Canada in 1896 from seeds obtained from Germany, and then in the New York Arboretum in 1898. Plants were widely sold and promoted by the USDA for soil stabilization, reclamation, and wildlife habitat improvement programs through the 1980s.
Naturalized, wild-growing honeysuckle was found outside the Chicago’s Morton Arboretum in the 1920s and began rapidly spreading across the mid-west and eastern states. Wild Amur Honeysuckle was endemic in Ohio by 1993.
With plants growing upwards of 30 feet tall with arching branches of opposite, simple, ovate leaves 2 to 3 inches long, green above, paler and slightly fuzzy below, they have been rampant in the Little Miami State Park.
As for why blue is my favorite color, our teams use blue color in our spray mix for treating the stump after the team has cut/chain sawed the plant. Treatment must be done with 10 minutes of cutting as the plant cells will quickly close off the wound and the mix will not be absorbed. The mix we use is composed of 12-15% glyphosate herbicide, 0.5% Pentabark surfactant that helps move the mix into the stump, a small amount (1-2 tbl/gal) of ammonium sulfate fertilizer (also helps move the herbicide into the plant), and a small amount (<0.5%) of farm-grade blue colorant. The blue lets us target the spray to the absolutely smallest area needed to kill the honeysuckle above and below ground without doing damage to the surrounding native plants. Go Blue!
November 2019