Control with Basal Bark Herbicide Application pdfs/Wednesday-pdf/Uplands III/0850 S...Chinese Privet...
Transcript of Control with Basal Bark Herbicide Application pdfs/Wednesday-pdf/Uplands III/0850 S...Chinese Privet...
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Chinese Privet (Ligustrum sinense)
Control with Basal Bark Herbicide
Application
Stephen F. Enloe, Sarah O’Sullivan, and
Nancy J. Loewenstein
Auburn University
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Chinese privet
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75,000 – 100,000
50,000 – 75,000
25,000 – 50,000
10,000 – 25,000
1,000 – 10,000
< 1,000
Not Detected
Forest Acres
in a County Occupied
Chinese and European Privets Ligustrum sinense and L. vulgare
USDA Forest Service
SRS FIA database March 2008
Miller and Chambliss, Auburn
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“Between the hedges” refers to Chinese Privet!
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Privet Treatment Options
Foliar
Glyphosate (3%v/v) in late fall
Cut Stump
Glyphosate (25% v/v)
Triclopyr amine (25% v/v)
Basal Bark
Garlon 4 (20% v/v) in fall
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Brass tip shut off wand - ULV brass wand
(BG42401) available from Arborchem Products.
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Adjustable-cone nozzle - Spraying
Systems ConeJet 5500-X3
Flat fan nozzle -
Spraying Systems
2503
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Research Questions
Is there a differential performance
between triclopyr products?
Garlon4 @ 20, 10 and 5%v/v versus
Pathfinder II
Does stem size influence treatment
efficacy?
Does season of treatment influence
herbicide efficacy (winter versus spring)?
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Site 1: Stauffer
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Site 2: AU Swine Unit
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Treatments Treatment Rate (%v/v) lb ae/gal
Garlon 4
20 0.8
Garlon 4
10 0.4
Garlon 4
5 0.2
Pathfinder II
100 0.75
Untreated --- ---
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Used 40-50 individual clumps per treatment
Measured root collar diameter of each clump
Treated bottom 30 cm of
each stem within each
clump
Treatment timings January (Early winter)
March (Early Spring)
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Data Collected
Data collected 3 to18 months after treatment
Percent canopy defoliation
Number of resprouts per clump
Total length of resprouts per clump Lateral root resprouts within a 30 cm radius of
main stem are included in totals
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Privet Seedlings excluded
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Results
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Privet size was not
an issue
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Privet %Defoliation 18 MAT
0
10
20
30
40
50
60
70
80
90
100
Unt G5 G10 G20 Path
% D
efo
liati
on
January March
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Privet Total Sprout Length 18 MAT
0
40
80
120
160
200
240
280
Unt G5 G10 G20 Path
To
tal
Sp
rou
t L
en
gth
(in
/plt
) January March
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Chinese Privet %Kill 18 MAT
0
10
20
30
40
50
60
70
80
90
100
Unt G5 G10 G20 Path
% K
ill
January March
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Summary to date
Clump size for privet not a major issue for
basal bark treatment
Early winter and early spring timings both
work well for Garlon 4 at 20%
Reduced Garlon 4 rates do a lot of
damage, but expect more sprouting
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Questions?
www.alabamacrops.com
Go to Hay and Pasture Weed
Control Section
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Privet No.of Sprouts 18 MAT
0
1
2
3
4
5
Unt G5 G10 G20 Path
No
. o
f S
pro
uts
/Plt
January March