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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.