New Right-of-Way Herbicides
J. Ferrell
University of Florida - IFAS
2 New herbicides
• Indaziflam – Bayer
• Aminocyclopyrachlor – DuPont
Objectives
• What do they do?
• What do they NOT do?
• Where do they fit?
Indaziflam
• 3 choices – Alion – Citrus
– Specticle – Turf
– Esplanade – ROW and industrial
Indaziflam • Family – alkylazine • Rate: 3.5-7 oz/A
– 3.5 oz turf release – 7 oz for bare ground
• MOA – cellulose biosynthesis inhibitor
• Favorable tox profile • Activity
– Preemergence activity – Grasses and some broadleaf
weeds.
Where does it fit?
• Roadsides or power lines for weed control? – Yes, but it will likely require a herbicide partner
• Bare ground sites? – This is where it really shines.
Herbicide Rate Annual Grass control
3 months 6 months
Esplanade 3.5 oz 98 98
Esplanade 7 oz 95 95
Oust 3 oz/A 88 90
Krovar 6 lb/A 95 20
Karmex 5 lb/A 93 20
Karmex + Oust
5 lb/A 3 oz/A
97 100
Herbicide Rate Annual Grass control
3 months 6 months 8 months
Esplanade 3.5 oz/A 98 98 95
Esplanade 7 oz/A 95 95 95
Oust 3 oz/A 88 90 26
Krovar 6 lb/A 95 20 30
Karmex 5 lb/A 93 20 38
Karmex + Oust
5 lb/A 3 oz/A
97 100 33
NS --
No spray – 8 months later
Esplanade 7 oz – 8 months
Karmex
Krovar
Krovar
Oust + Karmex
indaziflam
Jacksonville
Oust
Karmex
Krovar
Esplanade – 7 oz
Can you find the Esplanade plot?
Esplanade
• What does it do? – Long-term control of grasses and select broadleaf
• What does it NOT do? – Control emerged weeds
• Where does it fit? – Bare ground sites
– An excellent rotation partner with Oust
Aminocyclopyrachlor
Aminocyclopyrachlor
• 4 choices (all industrial uses) – Perspective
– Viewpoint
– Streamline
– Method
Where does it fit?
• Roadsides? – Yes, excellent broad-spectrum herbicide
• Control of woody plants? – Maybe, but needs some help.
• Bare ground sites? – Good, but needs supporting herbicides.
ACP on Brush
• Foliar applications are weak on oak
• But, has been shown to be synergistic with applied with other herbicides (imazapyr).
• Looking for combinations for improved control.
Streamline 9.5 oz/A (ACP + metsulfuron)
0
20
40
60
% o
ak c
ontr
ol
1 year after treatment
Streamline
Streamline + 4 qt Krenite
Streamline 9.5 oz/A + 8 oz Arsenal AC
0
20
40
60
80
100
% c
ontr
ol
C
B
A
A
A
1 year after treatment
Streamline 9.5 oz/A + 8 oz Arsenal AC (3.75 oz ai ACP + 1.2 oz ai metsulfuron)
Foliar applications
• Streamline struggles with oak.
• The addition of Krenite is not much help.
• However, low rates of imazapyr dramatically improve control.
Basal Applications
Application
Application
• Applied April 2010
• ACP rates 5-20%
• Black cherry, average 3”DBH (ranged 2-5”)
• Data, % brownout
ACP (1 lb gal) plus basal oil 6 months after treatment
0
20
40
60
80
% b
row
nout
5% MAT tree: 1.5 DBH
20% MAT
20% MAT
20% Garlon
20% Garlon
Basal applications
• ACP is marginally effective on cherry.
• Garlon (triclopyr ester) performed as expected.
• These date are at 6 MAT. A lot can happen to change these results in the next 6-12 months.
Aminocyclopyrachlor
• What does it do? – Excellent on broadleaf weeds
• What does it NOT do? – Control weedy trees – needs some help.
– Bare ground sites – needs some help.
• Where does it fit? – Anywhere you find herbaceous weeds.