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Re: honeysuckle

CarmenTK@aol.com wrote:
> 
> Does anyone have any hints on how to efficiently remove Japanese honeysuckle
> from fencerows?  I'm pulling it off trees and shrubs and ripping the streamers
> up from the ground where I know I am not going to mow it down.  But as I have
> more than 1500 feet of fencerow on 2 sides of my 14 acres it looks like it's
> going to take me the rest of my life to even make a dent.  Thanks for any
> help.
> 
> Carmen
> middle Tennessee, zone 6
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I have found glyphosate to be highly effective on this species.  This
species seems more susceptible to glyphosate than other woody
perennials.
I have seen surprisingly little to no regrowth from just one treatment.  
This almost never happens when using herbicides on woody perennials. 
The key to effective control is getting good coverage of the foliage. 
Very little glyphosate is absorbed into the plant via woody stem and
trunks.  The leaves is where uptake is the greatest.  Glyphosate is a
very mobile herbicide in many plants.  It is translocated to actively
growing root and bud tissue.  This is why it is so effective.  By
contrast contact herbicides only kill tissue that is contacted by the
spray solution.    These herbicides do not translocate in plants. 
Contact herbicides therefore are far less effective on perennial
plants.  Glyphosate (Roundup) when mixed at high concentrations cause
rapid death of the foliar and vascular tissues and thus limits the
translocation of the herbicide in the plant.  It acts more like a
contact material. The end result is much lower control even though more
active ingredient is used.  I have killed this beast with the pre-mixed,
(ready to use) formulations available at local garden centers.  These
formulations have very low concentrations of glyphosate.  With the
amount of area that you have, you would be ahead to go to your local
farm supply (not your local garden center) and get a gallon of Roundup
Ultra.  Follow the mixing instructions on the label as well as the other
cautions.  This material is relatively nontoxic to humans but the
emulsifiers and surfactants in the product can be toxic to aquatic
organisms.  Also be very careful not to allow the spray solution to come
in contact with desirable plants as they will be injured or killed also.

Brett Roberts
State Conservation Agronomist
USDA-Natural Resources Conservation Service (Illinois)

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