Abstract
Abstract Sericea lespedeza ( Lespedeza cuneata ) is an invasive nonnative legume that commonly occurs on sites managed for northern bobwhite ( Colinus virginianus ). Sericea reduces bobwhite habitat availability by outcompeting native plants that provide food and cover. Sericea can be controlled with postemergence herbicides such as glyphosate as well as a mixture of triclopyr with fluroxypyr, but these herbicides do not provide preemergence control. Imazapic has been effective at controlling a limited number of planted sericea seeds, but the efficacy of imazapic at various application rates to control sericea seedbank response following treatment with a postemergence herbicide has not been evaluated. We designed a field experiment to evaluate sericea control and changes in the plant community as related to bobwhite habitat with 2 postemergence herbicides followed by preemergence treatment of imazapic at 3 sites in Tennessee and Alabama, USA, 2018–2022. Specifically, we treated sericea with postemergence broadcast applications of glyphosate or triclopyr with fluroxypyr in 2018 and applied spot treatment with the same herbicides in 2019–2021. We applied imazapic at 4 rates following prescribed fire in 2019 and 2022. We measured coverage of sericea, native forbs, annual grasses, perennial grasses, and bobwhite food plants before treatment in 2018 and after all treatments in 2022. Nearly all postemergence treatments reduced sericea coverage, but imazapic did not increase control compared to postemergence herbicides alone. Perennial grasses used for nesting and bobwhite foraging were maintained following treatments. We recommend managers use either glyphosate or triclopyr with fluroxypyr to control sericea postemergence and consider using a low rate of imazapic to reduce annual grasses if coverage is a problem on the site.
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Claims 5
Claim · model-written summary
Nearly all postemergence herbicide treatments reduced sericea lespedeza coverage.
- Taxon
- Sericea lespedeza
Lespedeza cuneatat0 - Treatment
- postemergence treatmentse1
- Outcome
- sericea coveragee1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nearly all postemergence treatments reduced sericea coverage”
t0“Sericea lespedeza”
Claim · model-written summary
Adding imazapic after postemergence herbicides did not increase sericea control compared with postemergence herbicides alone.
- Taxon
- Sericea lespedezaLespedeza cuneatat0
- Treatment
- imazapice2
- Outcome
- controle2
- Direction
- did not increasee2
- Comparator
- postemergence herbicides alonee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“imazapic did not increase control compared to postemergence herbicides alone”
t0“Sericea lespedeza”
Claim · model-written summary
Perennial grasses used for nesting and bobwhite foraging were maintained after the treatments.
- Taxon
- Perennial grassese3
- Treatment
- treatmentse3
- Outcome
- Perennial grasses used for nesting and bobwhite foraginge3
- Direction
- maintainede3
Not reportedComparator
Verbatim
e3“Perennial grasses used for nesting and bobwhite foraging were maintained following treatments”
t0“Sericea lespedeza”
Claim · model-written summary
Managers are recommended to use glyphosate or triclopyr with fluroxypyr for postemergence control of sericea lespedeza.
- Taxon
- Sericea lespedezaLespedeza cuneatat0
- Treatment
- glyphosate or triclopyr with fluroxypyre4
- Outcome
- control sericea postemergencee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“We recommend managers use either glyphosate or triclopyr with fluroxypyr to control sericea postemergence”
t0“Sericea lespedeza”
Claim · model-written summary
A low imazapic rate may be used to reduce annual grasses if sericea coverage is a problem on the site.
- Taxon
- Sericea lespedezaLespedeza cuneatat0
- Treatment
- low rate of imazapice5
- Outcome
- reduce annual grassese5
- Qualifier
- if coverage is a problem on the sitee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“consider using a low rate of imazapic to reduce annual grasses if coverage is a problem on the site”
t0“Sericea lespedeza”
The same questions in other papers
imazapic · control · Lespedeza cuneata (sericea lespedeza)Positive and negative results
1 reporting no difference from an alternative
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.