Evidence for massive clonal growth in the invasive weed Fallopia japonica (Japanese Knotweed)

2000 ◽  
Vol 133 (4) ◽  
pp. 463-472 ◽  
Author(s):  
M HOLLINGSWORTH
Keyword(s):  
Clonal Growth ◽  
Japanese Knotweed ◽  
Invasive Weed ◽  
Fallopia Japonica

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 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.

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 Comparative Histological and Phytochemical Study of Fallopia Species

2016 ◽  
Vol 11 (2) ◽  
pp. 1934578X1601100
Author(s):  
Heléna Békési-Kallenberger ◽  
Györgyi Horváth ◽  
Tímea Bencsik ◽  
Viktória Lilla Balázs ◽  
Rita Filep ◽  
...  
Keyword(s):  
Flowering Period ◽  
Japanese Knotweed ◽  
Tannin Content ◽  
Fallopia Japonica ◽  
Phytochemical Study ◽  
Histological Characteristics ◽  
Giant Knotweed ◽  
Species Specific ◽  
Asian Herbal Medicine ◽  
Stem Leaf

Fallopia species which belong to the Polygonaceae family have several data related to their use in the Asian herbal medicine. In this work, some histological and phytochemical parameters of Fallopia japonica, F. sachalinensis, and F. × bohemica were analysed and compared. Rhizome and leaf samples were collected before, during, and after the flowering period at 3 habitats in Szombathely and 4 habitats in Baranya County, Hungary. The main histological characteristics of the stem, leaf and petiole were studied by light microscopy in cross section. Total tannin and anthraquinone contents were determined according to the official methods of the Hungarian Pharmacopoeia VIIIth (equal to the European Pharmacopoeia 6th). No species-specific markers were found in any plant part. In the rhizome, the highest tannin content was measured in Japanese knotweed, followed by Bohemian and giant knotweed in each period. The tannin content measured in each plant was higher in the leaves than in the rhizomes except F. japonica. The rhizome of F. japonica had the highest anthraquinone content before the flowering period, followed by F. × bohemica and F. sachalinensis. According to earlier and our preliminary data, Fallopia taxa are of great therapeutic promise in the future.

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