scholarly journals Fallopia japonica (Japanese knotweed).

2020 ◽  
Author(s):  
Dick Shaw
Keyword(s):  
Invasive Species ◽  
Recipient Country ◽  
Soil Types ◽  
Invasive Weeds ◽  
Japanese Knotweed ◽  
Invasive Weed ◽  
Fallopia Japonica ◽  
Introduced Range ◽  
Hard Structures ◽  
Potential Contaminant

Abstract F. japonica is an extremely invasive weed despite its lack of extensive sexual reproduction in most of its introduced range. It is included on various lists of invasive weeds and is one of the 100 worst invasive species as identified by the IUCN. It is a potential contaminant of soil, and its ability to tolerate a remarkable range of soil types and climates means that it has the potential to spread much further than it has to date. It has gained a fearsome reputation for breaking through hard structures in the built environment and being almost impossible to eradicate once it has taken hold and is often recognized as one of the most pernicious weeds in any recipient country.

Fallopia japonica (Japanese knotweed).

2021 ◽  
Author(s):  
Dick Shaw
Keyword(s):  
Invasive Species ◽  
Recipient Country ◽  
Soil Types ◽  
Invasive Weeds ◽  
Japanese Knotweed ◽  
Invasive Weed ◽  
Fallopia Japonica ◽  
Introduced Range ◽  
Hard Structures ◽  
Potential Contaminant

Abstract F. japonica is an extremely invasive weed despite its lack of extensive sexual reproduction in most of its introduced range. It is included on various lists of invasive weeds and is one of the 100 worst invasive species as identified by the IUCN. It is a potential contaminant of soil, and its ability to tolerate a remarkable range of soil types and climates means that it has the potential to spread much further than it has to date. It has gained a fearsome reputation for breaking through hard structures in the built environment and being almost impossible to eradicate once it has taken hold and is often recognized as one of the most pernicious weeds in any recipient country.

scholarly journals Invasive Species Removal Promotes Habitat Restoration but Does Not Immediately Improve the Condition of a Threatened Plant Subspecies

2019 ◽  
Vol 10 (1) ◽  
pp. 111-125
Author(s):  
Kali Z. Mattingly ◽  
John J. Wiley ◽  
Donald J. Leopold
Keyword(s):  
Invasive Species ◽  
Habitat Restoration ◽  
Interspecific Interactions ◽  
Block Design ◽  
Light Condition ◽  
Japanese Knotweed ◽  
Fallopia Japonica ◽  
High Light Condition ◽  
Species Removal ◽  
Growth And Reproduction

Abstract Impacts of invasive species on rare species are relevant to conservation. We studied the response of Leedy's roseroot Rhodiola integrifolia subsp. leedyi, a subspecies listed as threatened under the Endangered Species Act, to removal of the invasive species Japanese knotweed Fallopia japonica. Japanese knotweed has invaded the largest known population of Leedy's roseroot, affecting about 10% of all Leedy's roseroot in the world. Japanese knotweed shaded Leedy's roseroot, but the two did not share belowground resources because of their position on cliffs. To study this interaction and, ultimately, to restore Leedy's roseroot habitat to an open, high-light condition, we removed Japanese knotweed in a three-treatment block design. We measured Leedy's roseroot abundance, growth, and reproduction in treatment blocks and in uninvaded areas before and after treatment. Compared with uninvaded areas, Japanese knotweed invasion negatively affected Leedy's roseroot abundance, growth, and reproduction. Light interception by Japanese knotweed degraded the habitat for Leedy's roseroot. Herbicide removal of Japanese knotweed resulted in increased light and temperature compared with untreated invaded plots but did not affect Leedy's roseroot abundance, growth, or reproduction over the 2 y of our study. These results show that invasive species removal is conducive to restoring Leedy's roseroot habitat, but recovery in the subspecies may lag behind restoration of the habitat, suggesting that additional action or time may be required to restore preinvasion performance of Leedy's roseroot. Results of this study may inform restoration efforts for other systems and contribute to the literature on interspecific interactions.

scholarly journals Rhododendron and Japanese Knotweed: invasive species as innovative crops for second generation biofuels for the ionoSolv process

RSC Advances ◽  
2021 ◽  
Vol 11 (30) ◽  
pp. 18395-18403
Author(s):  
Louis M. Hennequin ◽  
Karen Polizzi ◽  
Paul S. Fennell ◽  
Jason P. Hallett
Keyword(s):  
Invasive Species ◽  
Ionic Liquid ◽  
Economic Burden ◽  
Second Generation ◽  
Japanese Knotweed ◽  
Fallopia Japonica ◽  
Second Generation Biofuels ◽  
Rhododendron Ponticum ◽  
Environmental Threat ◽  
The Uk

Japanese Knotweed (Fallopia japonica) and Rhododendron (Rhododendron ponticum), two invasive species in the UK that are an environmental threat and economic burden, can be integrated into a flexible ionic liquid based biorefinery process to produce bioenergy and chemicals.

scholarly journals Invasive Plants in Support of Urban Farming: Fermentation-Based Organic Fertilizer from Japanese Knotweed

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1232
Author(s):  
Rozalija Cvejić ◽  
Susanne Klages ◽  
Marina Pintar ◽  
Lara Resman ◽  
Ana Slatnar ◽  
...  
Keyword(s):  
Invasive Plants ◽  
Chinese Cabbage ◽  
Organic Fertilizer ◽  
Farmyard Manure ◽  
Japanese Knotweed ◽  
Perennial Crop ◽  
Fallopia Japonica ◽  
Suitable Alternative ◽  
Cropping Patterns ◽  
Average Mass

In this study, fermentation-based organic fertilizer (OF) was produced from the aboveground parts of Fallopia japonica (Houtt.) Ronse Decr. The quantity of N in OF (17.2 kg t−1 fresh lactic-fermented OF) was higher than average in cattle farmyard manure, but on a comparable level to solid poultry and rabbit manure. The OF was applied on a field to evaluate its effect on Chinese cabbage. The applied nutrients with OF N159 were 159, 44 and 121 kg ha−1 for N, P, and K, respectively. The applied nutrients with OF N317 were 317, 38, and 200 kg ha−1 for N, P, and K, respectively. The average mass of marketable Chinese cabbage (Brassica pekinensis Rupr.) single heads ranged from 253 g with N0 treatment to 602 g with N317 treatment. The nutrient recovery efficiency REN,P,K was 37, 20, and 50% for N317 and 55, 48, and 77% for N159. The OF was found to be a suitable alternative to farmyard manure. Additionally, OF produced from F. japonica could complement existing approaches to limit the spread of invasive species in cities. Further research should focus on perennial crop rotations and cropping patterns, different soil types, and a greater variety of crops and consider the possible retention of urban farmers using fertilizer from invasive plants.

Glucose oxidase-assisted extraction of resveratrol from Japanese knotweed (Fallopia japonica)

2016 ◽  
Vol 40 (9) ◽  
pp. 8131-8140 ◽  
Author(s):  
Huaguo Chen ◽  
Qingfang Deng ◽  
Xiuhong Ji ◽  
Xin Zhou ◽  
Glen Kelly ◽  
...  
Keyword(s):  
Glucose Oxidase ◽  
Extraction Yield ◽  
Japanese Knotweed ◽  
Fallopia Japonica ◽  
Assisted Extraction

Glucose oxidase can completely convert resveratrol glycoside into resveratrol, and significantly increase the extraction yield of resveratrol in Japanese knotweed.

Extending the Timeframe for Rapid Response and Best Management Practices of Flood-Dispersed Japanese Knotweed (Fallopia japonica)

2015 ◽  
Vol 8 (2) ◽  
pp. 250-253 ◽  
Author(s):  
Brian P. Colleran ◽  
Katherine E. Goodall
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Time Frame ◽  
Rapid Response ◽  
Limiting Factor ◽  
Japanese Knotweed ◽  
Green River ◽  
Fallopia Japonica ◽  
Best Management ◽  
Successful Removal

The objective of this article is to extend the reported period in which flood-distributed knotweed propagules may be successfully managed using only manual labor. During a second round of early detection and rapid response (EDRR) management along the Green River in Guilford, VT, we collected and measured all Japanese knotweed propagules that had been distributed by flooding approximately 21 mo earlier, in August 2011, at a single site. Our data suggest that knotweed s.l. prioritizes the growth of new stems over new rhizomes at the start of a growing season. Because the limiting factor for successful removal of new knotweed s.l. plants by hand is the size of the rhizome system, our findings support extending the time frame for EDRR management of flood-distributed knotweed s.l. into the second spring after its initial dispersal. Additionally, in November 2013, surveys of our work sites found no new knotweed s.l. plants in locations accessible to work crews. In addition to validating our EDRR management techniques, this implies that knotweed s.l. fragment viability does not extend past the second spring following its dispersal.

scholarly journals Increased fitness and plasticity of an invasive species in its introduced range: a study using Senecio pterophorus

2008 ◽  
Vol 96 (3) ◽  
pp. 468-476 ◽  
Author(s):  
L. Caño ◽  
J. Escarré ◽  
I. Fleck ◽  
J.M. Blanco-Moreno ◽  
F.X. Sans
Keyword(s):  
Invasive Species ◽  
Introduced Range
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