promising new herbicide technologies for the management of ......evaluation of new herbicides and...
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Evaluation of New Herbicides and Techniques for Management of Old World Climbing Fern (Lygodium
microphyllum) in Arthur R. Marshall Loxahatchee National Wildlife Refuge
Jonathan Glueckert, Graduate Research AssistantStephen Enloe, Associate ProfessorUniversity of Florida Center for Aquatic & Invasive Plants
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Old World Climbing Fern (Lygodium microphyllum)
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Issues with Lygodium
• Aggressive, blanketing, growth habit
• Year round spore production and dispersal
• Tolerance to flooding and fire
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Management
• Ground treatments• Backpack application
• Glyphosate (3% v/v)
• Aerial treatments• Metsulfuron-methyl
• Biocontrol• Neomusotima
conspurcatalis• Floracarus perrepae
(Hutchinson and Langeland 2007)
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Herbicides/ Tank MixesRoundup Custom GlyphosateGarlon 3A Triclopyr (Amine)Vastlan HL Triclopyr (Choline)Trycera Triclopyr (Acid)Method AminocyclopyrachlorEscort MetsulfuronMethod + Escort Aminocyclopyrachlor + metsulfuronProcellaCOR EC Florpyrauxifen benzylProcellaCOR SC Florpyrauxifen benzylClipper FlumioxazinStingray CarfentrazoneRoundup Custom + Clipper Glyphosate + FlumioxazinRoundup Custom + Stingray Glyphosate + CarfentrazoneLondax BensulfuronPermit HalosulfuronSharpen SaflufenacilNewpath ImazethapyrBasagran Bentazon
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Advances in herbicide technology warrant testing on OWCF
• New triclopyr formulations• Acid and choline forms
• New aquatic active ingredient• Florpyrauxifen-benzyl
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Objectives• Evaluate triclopyr
formulations for OWCF control against glyphosate in ARM Lox NWR
• Examine potential efficacy of florpyrauxifen-benzyl on OWCF in ARM Lox NWR
• Long term goal of increasing the tools for managers
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Fort Pierce
Okeechobee
Wellington
Study Locations
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Study Active ingredient/formulation
Application Dates %v/v or rate g/ha
Rate(kg ae/ha)
1 Triclopyr amineWellington: December 2016
Okeechobee: May 2017
3.0%, 1.5% 4.0, 2.0Triclopyr choline 2.2%, 1.1% 4.0, 2.0Triclopyr acid 3.1%, 1.6% 4.0, 2.0Glyphosate 3% 5.4Untreated --- ---
2 Floryprauxifen-benzyl (EC)
Ft. Pierce: March 2017
Okeechobee: May 2017
29 g/ha 0.03
Floryprauxifen-benzyl (EC)
58 g/ha 0.06
Floryprauxifen-benzyl (EC)
87 g/ha 0.09
Glyphosate 3% v/v 5.4Untreated --- ---
NIS added to each treatment at 0.5% v/v
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Data Collection
• % Visual Cover of live (green) OWCF
• 1m2 sub-samples from 4 quadrats within each plot
• 0, 60, 180, 360 DAT
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0
20
40
60
80
100
OW
CF %
Cov
erOkeechobee Wellington
OWCF Response to Triclopyr Formulation (180 DAT)
PTrt x Site<0.001B
A
C
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c
ab
bcbc
b b
c
a
B B B B BB
B
A
0
20
40
60
80
100
OW
CF %
Cov
er
Okeechobee Wellington
OWCF Response to Triclopyr Formulation (360 DAT)PTrt x Site=0.006
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bbc c c
a
B
CC C
A
0
20
40
60
80
100
FP-B 29g/ha
FP-B 58g/ha
FP-B 87g/ha
Gly (3%) Unt
OW
CF %
Cov
er
Okeechobee Ft Pierce
OWCF Response to Florpyrauxifen-Benzyl (180 DAT)PTrt x Site= 0.02
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a a
b
c
a
B
C
DD
A
0
20
40
60
80
100
FP-B 29g/ha
FP-B 58g/ha
FP-B 87g/ha
Gly (3%) Unt
OW
CF %
Cov
er
Okeechobee Ft Pierce
OWCF Response to Florpyrauxifen-Benzyl (360 DAT)PTrt x Site= 0.02
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Trial Conclusions• Multiple triclopyr formulations are potential alternatives
to glyphosate• Some significant variation in formulation efficacy at 12 MAT
between sites • Hydrology related• Current mesocosm studies addressing this
• Florpyrauxifen-benzyl • Documented its efficacy on OWCF• Very slow acting • Somewhat less consistent than glyphosate • Need to refine rates/formulations• Evaluate selectivity
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A.R.M. Loxahatchee NWR
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MID LEVEL DATA
GROUND LEVEL DATA
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Mid Level Data
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Ground Level Data
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Aerial TreatmentsFlorpyrauxifen-benzyl
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0.71r
r
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Ongoing and Future Research• Tree Island Ground Treatments- Currently 40 Islands
• Florpyrauxifen-benzyl• Triclopyr
• Tree Island Aerial Treatments- Currently 20 Islands• Tree Island Retreatment Intervals- Currently 80 Islands• Kissimmee River Floodplain Aerial Treatments- 10 acres• Poodle cutting
• Florpyrauxifen- benzyl• Triclopyr Acid
• Mesocosm studies• Hydrology• Seasonality
• Herbicide Efficacy and Tank Mixes• Evaluation of UAS for mapping and treating OWCF• IPM Studies with USDA
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Acknowledgements
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Thanks! [email protected]; [email protected]