Thursday, July 16, 2015
New Video on Managing Oriental Bittersweet
Just like all invasive plants it is important to identify the plant and deal with infestations early before they become a major problem. If you are not familiar with this vine here are a couple of resources that will help.
Penn State Extension: Oriental Bittersweet
PA Department of Conservation and Natural Resources: Oriental Bittersweet
When controlling this plant it is important to prevent it from going to seed. So, the first step in the process is to cut the larger mature vines as they grow up into the crowns of trees. It is imperative to use herbicides when dealing with this plant as cutting alone will do nothing to rid your woods of this invasive vine. Therefore, when cutting the vines be sure treat the cut surfaces with the appropriate mix. I have found that a 50% surfactant loaded glyphosate solution (ex. Accord XRTII) will provide pretty good control of the roots. Cut and treat stems outside of the early spring growing season when you may have sap flow. Cutting and treating is best in mid-later summer as it will provide maximum herbicide translocation to the roots.
Exotic Shrub Fact Sheet which includes this herbicide mixture of triclopyr and glyphosate. It is important to calibrate your spray equipment before applying this mixture. Follow the instructions for Simple Sprayer Calibration: Spot Applications outlined here.
The University of Minnesota Extension has recently released an excellent video entitled "Defeating a Killer Vine: Oriental Bittersweet Management." This is an excellent 5 minute video that covers both ID and control. Be sure to check it out.