[MAIPC] herbicide control of Autumn Olive, Multiflora Rose, and Bush Honeysuckle

[Gover, Art]

Hi, Anne.

I use the glyphosate:triclopyr mix (3.0 lbs plus 1.5 lbs, acid basis, per acre, respectively) to good effect. The only species I have observed unsatisfactory injury is common buckthorn (glossy is susceptible). If you use it, be certain to follow the mixing guidelines:
- start with 3/4 of the total water
- add the triclopyr, begin agitation
- add the glyphosate only after the triclopyr is mixed, and agitate immediately or constantly.
- I don’t apply the mix at carrier volumes lower than 20 gallons/acre - the two ingredients behave at that concentration, but at higher concentrations (lower carrier volumes) you can start to see precipitate.

Plan on a follow-up. You can be very selective with a low volume application with a backpack sprayer, but you will not get the canopy penetration you would with a mistblower, so retreatment is pretty much inevitable.

I would push up the window up to September into October. Exotics do hold foliage comparatively late, but waiting into October runs risk of “early” leaf drop or fall color, and therefore reduced effect. I find rose is often defoliated earlier than the other species.

I can’t really comment on the training, as I am only familiar with applicator training in PA, which has two levels, Certified Applicator (pass Core and Category exam(s), work autonomously, can directly supervise non-credentialed applicators) or Registered Technician (trained by a Certified Applicator in a 13-point curriculum, can work autonomously, cannot supervise others). If you wish them to work autonomously, be prepared for the class to be pretty involved and hands-on. Backpack spraying is simple in concept, particularly if you can distinguish the species, master the equipment and proper coverage, and deal with the terrain and site conditions. (:

Be well.

Art Gover


On Jun 1, 2022, at 12:30, Wakeford, Anne M <anne.m.wakeford at wv.gov<mailto:anne.m.wakeford at wv.gov>> wrote:

I'm planning an invasive species removal project in Elkins WV and there are native species mixed in. I  would like your advice.

The 3 invasive species I'm looking at are Autumn Olive, Multiflora rose, and Bush honeysuckle.
I'd like to use one herbicide that will work effectively for all 3 species.

I'm edging towards the cut stump method.  But would also consider basal bark

What is your thought of using a mix of triclopyr and glyphosate as per the Penn State article below?

I'm planning to work with volunteers and first hold a technician training class so they become certified in the use of herbicides.

Any advice you could provide would be greatly appreciated.
Or if there is anyone else you can recommend that I should contact for advice please provide me with their contact info

I'm hoping to have a training class late this summer and start applying in October or November.

Please feel free to call or email me.

Anne

Anne M. Wakeford
Coordination Biologist
WVDNR/EOC
738 Ward Rd.
PO Box 67
Elkins, WV 26241
304-637-0245 ext 2035
Anne.M.Wakeford at wv.gov<mailto:Anne.M.Wakeford at wv.gov>
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