Implementation of Control and Prevention Strategies for Managing Cogongrass (Imperata cylindrica) by the Georgia Invasive Species Task Force

Evans, Christopher; Moorhead, David J.; Bargeron, Charles T.; Douce, G. Keith

doi:10.3375/0885-8608(2007)27[226:iocaps]2.0.co;2

Cited by 9 publications

(8 citation statements)

References 7 publications

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“…Cogongrass is a significant threat to natural ecosystems, agriculture and silviculture throughout its introduced ranges (McDonald ; MacDonald ; Evans et al . ; Daneshgar et al . ).…”

Section: Discussionmentioning

confidence: 99%

Exploring origins, invasion history and genetic diversity ofImperata cylindrica(L.) P. Beauv. (Cogongrass) in the United States using genotyping by sequencing

et al. 2015

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Imperata cylindrica (Cogongrass, Speargrass) is a diploid C4 grass that is a noxious weed in 73 countries and constitutes a significant threat to global biodiversity and sustainable agriculture. We used a cost-effective genotyping-by-sequencing (GBS) approach to identify the reproductive system, genetic diversity and geographic origins of invasions in the south-eastern United States. In this work, we demonstrated the advantage of employing the closely related, fully sequenced crop species Sorghum bicolor (L.) Moench as a proxy reference genome to identify a set of 2320 informative single nucleotide and insertion-deletion polymorphisms. Genetic analyses identified four clonal lineages of cogongrass and one clonal lineage of Imperata brasiliensis Trin. in the United States. Each lineage was highly homogeneous, and we found no evidence of hybridization among the different lineages, despite geographical overlap. We found evidence that at least three of these lineages showed clonal reproduction prior to introduction to the United States. These results indicate that cogongrass has limited evolutionary potential to adapt to novel environments and further suggest that upon arrival to its invaded range, this species did not require local adaptation through hybridization/introgression or selection of favourable alleles from a broad genetic base. Thus, cogongrass presents a clear case of broad invasive success, across a diversity of environments, in a clonal organism with limited genetic diversity.

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“…Cogongrass is a significant threat to natural ecosystems, agriculture and silviculture throughout its introduced ranges (McDonald ; MacDonald ; Evans et al . ; Daneshgar et al . ).…”

Section: Discussionmentioning

confidence: 99%

Exploring origins, invasion history and genetic diversity ofImperata cylindrica(L.) P. Beauv. (Cogongrass) in the United States using genotyping by sequencing

et al. 2015

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“…Determining appropriate spatial scale relies on knowledge of dispersal capabilities of the target invasive species (Meentemeyer et al, 2008). Small populations at invasion fronts may be eradicated quickly with few non-target effects, as demonstrated by the Georgia Invasive Species Task Force on cogongrass (Imperata cylindrica), which aims to identify and eradicate new infestations before they spread (Evans et al, 2007).…”

Section: The Environmental Pillarmentioning

confidence: 99%

A framework for sustainable invasive species management: Environmental, social, and economic objectives

Larson

Phillips-Mao

Quiram

et al. 2011

Journal of Environmental Management

161

106

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“…Additionally, the seasonal timing of cut stump treatments can strongly influence subsequent sprouting (Kays and Canham 1991). Delanoy and Archibold (2007) stated that the best time to treat European buckthorn ( Rhamnus cathartica L.) was in the fall, while Evans et al (2006) recommended fall application and avoiding cut stump treatments with triclopyr in the spring. Given these questions, the objective of this study was to compare the efficacy of triclopyr and glyphosate cut stump treatments at spring and fall timings.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Treatment Timing and Shrub Size on Chinese Privet (Ligustrum sinense) Control with Cut Stump Herbicide Treatments in the Southeastern United States

Enloe

O’Sullivan

Loewenstein

et al. 2018

Invasive plant sci. manag.

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Since its introduction to the United States in 1852, Chinese privet (Ligustrum sinenseLour.) has spread throughout the Southeast, invading many natural areas. Manual control by cutting or shredding is one of the most common strategies many land managers employ. However, rapid sprouting from the root collar and lateral roots commonly results in poor control. Cutting followed by either glyphosate or triclopyr application to the stumps is generally effective, but the efficacy of these herbicides in relation to treatment timing andL. sinenseroot collar diameter has not been evaluated. The objective of this experiment was to determine the effectiveness of glyphosate and triclopyr cut stump treatments compared with cutting alone at spring and fall timings across a range ofL. sinensesize classes. Studies were conducted at two locations in Auburn, AL. Treatments included cut stump+no herbicide, cut stump+ glyphosate (120 g L−1), or cut stump+triclopyr (90 g L−1). Treatments were applied to at least 50 experimental units each at April and November timings. Root collar diameter was recorded for each stem, stems were cut 2.5 cm above the ground, and herbicide treatments were applied within 30 s.Ligustrum sinensemortality and sprouting were quantified 6, 12, and 18 mo after treatment. Both glyphosate and triclopyr amine were very effective in controllingL. sinenseat both spring and fall timings. However, glyphosate provided slightly better results than triclopyr when lateral sprouting was included. Application timing also was significant, with a lower percentage of sprouting following November treatments than April treatments. Stem size influenced treatment success, as larger stumps tended to sprout more than smaller stumps. These results indicateL. sinensecan be controlled with cut stump herbicide treatment using either glyphosate or triclopyr with spring or fall timings at concentrations much lower than typically used.

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Implementation of Control and Prevention Strategies for Managing Cogongrass (Imperata cylindrica) by the Georgia Invasive Species Task Force

Cited by 9 publications

References 7 publications

Exploring origins, invasion history and genetic diversity ofImperata cylindrica(L.) P. Beauv. (Cogongrass) in the United States using genotyping by sequencing

Exploring origins, invasion history and genetic diversity ofImperata cylindrica(L.) P. Beauv. (Cogongrass) in the United States using genotyping by sequencing

A framework for sustainable invasive species management: Environmental, social, and economic objectives

The Influence of Treatment Timing and Shrub Size on Chinese Privet (Ligustrum sinense) Control with Cut Stump Herbicide Treatments in the Southeastern United States

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