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Japanese Honeysuckle



Presentation on the invasive Japanese honeysuckle

Presentation on the invasive Japanese honeysuckle



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  • Lives in widely varied habitats. Not found in the northwest quarter of the country – too cold and or too dry.
  • Oblong to ovate leaves on short stalks.Leaves sometimes lobed, especially near the ground in areas where the vines are climbing.
  • Does it flower as a ground cover?? I have not seen it do so, but it could…5 stamens and 1 pistilBerries are roughly pea-sized
  • Spread by rhizomes, re-rooting at vine nodes where they contact soil, and seed dispersal by birds and other wildlife.
  • The vines of L. japonica wind tightly around the trunks of trees and shrubs, potentially girdling the tree.As with bush honeysuckle, the foliage of vining honeysuckle begins early and stays on after most other species have already dropped their leaves, decreasing the light available to native species.
  • -Spray in the fall once nearby vegetation is dormant. In our experience at LREC, spring spraying is not very effective. Others have found a 1.5% solution of glyphosate to be effective, but we often spray both L. japonica and E. fortunei at the same time, so we are usually spraying with a stronger solution. We do not use the herbicide formulation RoundUp at LREC due to concerns about its impacts on aquatic life. Glyphosate is sold without the added surfactants under the names Rodeo and Accord. -Other systemic herbicides like triclopyr (Garlon 3A) have also been shown to be effective. Crossbow, a formulation of triclopyr and 2,4-D, is also a very effective herbicide that controls Japanese honeysuckle.-Herbicides that have given poor control results or that are more persistent in the environment than other types are picloram, annitrole, aminotriazole, atrazine, dicamba, dicamba 2,4-D, 2,4-D, DPX 5648, fenac, fenuron, simazinetriclopyr.-Fire will knock back honeysuckle and help contain it, but will not remove the roots and therefore will allow re-sprouting.-Hand pulling is effective on small patches in moist soil, as long as roots are also removed. Revisit periodically to deal with any re-sprouts.
  • These photos were both taken last week in wooded edge areas adjacent to prairies. The one on the right was treated with 3% glyphosate last Nov.
  • This area has had many of the climbing vines removed, but Lonicera is still plentiful as a ground cover. *click* This is another area that was treated last fall. Notice the woody vines remain, but they have not sprouted.

Japanese Honeysuckle Japanese Honeysuckle Presentation Transcript

  • Japanese Honeysuckle(Lonicera japonica)Danelle HaakeLitzsinger Road Ecology CenterMay 17, 2012
  • Lonicera japonicaHistory Native to Japan and Korea Horticultural Introduction (early 1800s)  Ornamental  Erosion Control  Wildlife (deer and birds)
  • Lonicera japonicaHabitat & Distribution Woodlands Prairies Edges
  • Lonicera japonicaCharacteristics & Identification Woody vine  Climbing  Ground cover
  • Lonicera japonicaCharacteristics & Identification Opposite leaves and branches  Entire margins  Some leaves lobed Feb 24 May 10
  • Lonicera japonicaCharacteristics & Identification Flowers  April to July  White to yellow  Very fragrant Fruit  Single berries  Green (unripe) to black (ripe)
  • Lonicera japonicaSpread Animal-dispersed seeds Rooting at nodes
  • Lonicera japonicaHarmful Effects Girdlingof trees and shrubs Long leaf-on period
  • Lonicera japonicaControl Foliar spray  1.5-3% glyphosate  Fall application Cut-and-paint  25% glyphosate  Remove climbing vines Fire  Limits spread, but does not eliminate Hand pull
  • Lonicera japonicaBefore & After
  • Lonicera japonicaBefore & After
  • Lonicera japonicaReferences James Miller. Non-Native Invasive Plants of Southern Forests. USDA Report SRS-62, 2007. Shaw Nature Reserve. Control and Identification of Invasive Species. SNR, 2008. Plant Conservation Alliance, Alien Plant Working Group: www.nps.gov/plants/alien/fact/pdf/loja1.pdf USDA PLANTS Database: plants.usda.gov/java/profile?symbol=LOJA Missouri Department of Conservation: mdc.mo.gov/landwater-care/invasive-species- management/invasive-plant- management/japanese-honeysuckle-control