3/6/2018 1 Watch It Burn Using fire as a tool to address reinvasion of juniper trees after initial treatment and promote healthy sage‐ steppe ecosystems Laura Snell University of California Cooperative Extension Modoc County Partners in Research • David Lile UCCE Lassen • Tom Getts UCCE Lassen • Janyne Little UC Davis Background Background • Over 3 Million Acres in Northern California • Affects Habitat, Forage, and Hydrologic Function • Perils of the Chipping Market Background – Research Holes • Targeting re‐invasion • Trials for fast and efficient juniper control • Private land verse public land control methods • Field test Miller et. al. resilience and resistance • Quantify forage production changes
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3/6/2018
1
Watch It BurnUsing fire as a tool to address
reinvasion of juniper trees after initial treatment and promote healthy sage‐
steppe ecosystems
Laura SnellUniversity of California Cooperative
Extension Modoc County
Partners in Research• David Lile UCCE Lassen• Tom Getts UCCE Lassen• Janyne Little UC Davis
Background
Background• Over 3 Million Acres in Northern California
• Affects Habitat, Forage, and Hydrologic Function
• Perils of the Chipping Market
Background – Research Holes• Targeting re‐invasion• Trials for fast and efficient juniper control
• Private land verse public land control methods
• Field test Miller et. al. resilience and resistance
• Quantify forage production changes
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Methods
• 2 Field Sites– Private Land– Modoc, Lassen County
– Reinvasion of Juniper after Prior Treatment
– Spring 2016 Treatment
Methods• 6 Treatments
– EZject– Glyphosate– Method– Milestone– Lop– Propane Torch
• Timed • Effectiveness (% dead)
Methods Effectiveness
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Effectiveness Effectiveness
Preliminary Results
051015202530354045
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EZJect Glyphosate Method Milestone Lop Propane
Num
ber o
f Trees
Treatment ‐ Site
Control Method vs. Health of Tree
DeadAlive
Preliminary Results
0102030405060708090
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EZJect Glyphosate Method Milestone Lop Propane
Percen
t Dead
Treatment‐ Site
Control Method vs. Percent Dead of Live Trees
AveragePercentDead
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Preliminary Results
0
5
10
15
20
25
30
35
40
45
EZJect Glyphosate Method Milestone Lop Propane
Average Timing
Secondsper Tree
ConclusionsEzject• Expired herbicides do not work• 22 shells are not as
economically viable as once were
Hack and Squirt• Very quick application• Not as effective on conifers• Timing may be a factor• Hack around the tree? • More herbicide?
Conclusions
Lopping• Longest time involved• Size of tree restrictions• Problems with resprout• Physically challenging• Is stump treatment needed?
Conclusions
Propane Burner• Not much quicker than lopping
• Leaves dead tree• Less physically demanding
• Possibly more fun
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ConclusionsWe have not solved the problem.Good thing there are plenty of juniper trees out there.We have learned some important lessons though.
Future Research
• Terra Torch• Forage Production• Field Test Miller et al• Economics• Non‐target Species• Hydrologic Function
Thanks!
• Questions?
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