1. Control of Invasive Species in the Forest
Matt Arndt
Photo Credit: eeekeverywhere.wordpress.com

2. Major Species Autumn olive Bush honeysuckle Chinese pear
Garlic mustard
Japanese honeysuckle
Japanese hops
Multiflora rose
Tree-of-heaven
en.rl8st.com
media.arkansasonline.com
Many infestations are associated with disturbance or old homesites
Several species are more shade tolerant -- i.e. bush honeysuckle and garlic mustard – and occur in the forest interior; others are less so and typically occur on edges or in fields and openings – i.e. autumn olive and chinese pear
Nearly all species are abundant seed producers
gocolumbiamo.com
nps.gov
invasivore.org
blog.mass.gov
dnr.wi.gov
nps.gov

3. Benefits and drawbacks to each
Control Options
Foliar Treatment
Cutting
Stem Injection
Grinding (bullhog)
Pulling
Bulldozer
Goats!
Foliar
- PHOTO – will use a lot of chemical for blanket applications
- Best with spot treatments
- backpack sprayer; tank sprayer; backpack mist blower; UTV mounted mist blower; helicoptor
- aerial spraying with helicopter has been reported as low as $60/ac
- minimally selective
Cutting
- PHOTO – can be impossible for some species
- can be very expensive, depending on severity of infestation
- Some species are nearly impossible to cut (japanese hops, garlic mustard) or are very unpleasant (multiflora rose)
- selective treatment
Hack & Squirt
- PHOTO – can be a tremendous amount of stems
- very effective on woody species
- leaves standing skeletons, which makes follow-up treatments difficult
Grinding
- PHOTO - Need access for machinery; sometimes not possible
- immediate results
- limited by slope and tree densities
- does not treat roots
- non-selective
Pulling
- PHOTO – can be difficult for large plants
- very effective, particularly on small bush honeysuckle in moist soil
- very selective, but time consuming
Dozer
- Very blunt instrument – can be the only effective option
Goats
- PHOTO – will eat nearly anything, but can be labor intensive and costly to build/ maintain fence
- very promising, natural control by defoliation
- Has real potential, especially on smaller tract sizes
myweb.loras.edu
gobiologic.com
eeekeverywhere.wordpress.com
Thestreettree.com
Pecva.org
Bayjournal.com
Benefits and drawbacks to each

4. This slide and next do not show invasives, but show the impact goats can have
goatsonthego.com

5. Multiflora rose is better quality forage than alfalfa
goatsonthego.com

6. Bottom Line
Treatment protocols will need to be fitted to each individual project based on a variety of factors
Cost
Tract size
Severity of infestation
Location
Species
Available resources
Desired season of treatment
Many projects will involve multiple treatment types
Very unlikely to be a one-and-done treatment
Multiple types – e.g. cutting of larger plants, pulling of smaller; grinding of flat areas, foliar application on steep; hack & squirt of dense stands, foliar spray on sporadic plants; grinding as first treatment, foliar spray of resprouts

7. If all else fails…
Embrace it!
goingtoseedinzone5.com