https://bsppjournals.onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-3059.1999.0378b.x

Fundamentals of Weed Science

At the global level, the invasion of alien organisms is considered the second largest threat to biodiversity. The assumption is that the high allelopathic potential is one of the features that helps invasive plant species to spread to new areas. In the study was determined allelopathic potential of eight invasive plant species (donor species) and their impact on test-species. Donor species were Abutilon theophrasti Med. - velvetleaf (Malvaceae), Ambrosia artemisiifolia L. - ragweed (Asteraceae), Datura stramonium L. - white jimsonweed (Solanaceae), Xanthium strumarium L. - cocklebur (Asteraceae), Ailanthus altissima (Mill.) Swingle - tree of heaven (Simaroubaceae), Amorpha fruticosa L. - indigo bush (Fabaceae), Reynoutria japonica Houtte. - Japanese knotweed (Polygonaceae), Solidago gigantea Aiton - giant goldenrod (Asteraceae). Three cultivated plant species from three different plant families were used as test-species: Avena sativa L. - oats (Poaceae), Brassica napus L. - oilseed rape (Brassicaceae) and Helianthus annuus L. - sunflower (Asteraceae). Water extracts made of whole plants of donor species were applied to the seeds of the test-species. High allelopathic potential was proven for all species included in experiment. Allelopathic effects were exclusively negative. Impact on the germination for all species is much smaller in relation to the impact on the radicle and shoot length of the test-species. Perennial species had a stronger allelopathic potential than annual species. Tree of heaven is species with the strongest allelopathic potential. Its extracts inhibited germination, radicle and shoot length of oilseed rape 19%, 94.88% and 98.91% respectively. Applying allelopathy in agriculture can reduce the use of synthetic pesticides.

/pdf/allelopathic-potential-of-segetal-and-ruderal-invasive-alien-40zx8au03s.pdf

Allelopathic potential of segetal and ruderal invasive alien plants

The Green City is a city that is “in balance with nature,” where all forms of nature—from living organisms to their habitats—are highly significant components of the urban form and part of green infrastructure. In a Green City, all forms of nature are respected, maintained, and extended for the benefit of city residents. Urban nature is seen as an ideal provider of services, and a key concept for city development. Almost all types of urban spaces are host to urban nature—either random (“wild”) or introduced by human decisions (e.g., trees, plantations). These areas are either actively used (e.g., meadows, grazeland, parks, gardens, urban forests, etc.) or are abandoned from their previous use (e.g., brownfields or certain wetlands and forests). Urban green infrastructure can be understood as a network of all urban natural elements—either close to nature or designed green space can be a planning relevant category. The concept of urban green infrastructure is thus exemplary for strategic and integrated planning, protection, development, and management of urban nature. This requires citywide, district-based and object-based spatial concepts.

Making Green Cities – Concepts, Challenges and Practice.

The use of natural products that can serve as natural herbicides and insecticides is a promising direction because of their greater safety for humans and environment. Secondary metabolites of plants that are toxic to plants and insects-allelochemicals-can be used as such products. Woody plants can produce allelochemicals, but they are studied much less than herbaceous species. Meanwhile, there is a problem of interaction of woody species with neighboring plants in the process of introduction or invasion, co-cultivation with agricultural crops (agroforestry) or in plantation forestry (multiclonal or multispecies plantations). This review describes woody plants with the greatest allelopathic potential, allelochemicals derived from them, and the prospects for their use as biopesticides. In addition, the achievement of and the prospects for the use of biotechnology methods in relation to the allelopathy of woody plants are presented and discussed.

…Fell Upas Sits, the Hydra-Tree of Death †, or the Phytotoxicity of Trees.

Non-native invasive species frequently appear in urban and non-urban ecosystems and may become a threat to biodiversity Some of these newcomers are introduced accidentally, and others are introduced through a sequence of events caused by conscious human decisions Involving the general public in biodiversity preservation activities could prevent the negative consequences of these actions Accurate and reliable data collecting is the first step in invasive species management, and citizen science can be a useful tool to collect data and engage the public in science We present a case study of biological recording of tree of heaven (Ailanthus altissima (Mill) Swingle) using a participatory citizen model The first goal in this case study was to develop a cheap, widely accessible, and effective inventory method, and to test it by mapping tree of heaven in Croatia A total of 9061 km of roads and trails was mapped; 20 single plants and 19 multi-plant clusters (mapped as polygons) were detected The total infested area was 2610 m2 The second goal was to educate citizens and raise awareness of this invasive species The developed tool and suggested approach aided in improving invasive risk management in accordance with citizen science principles and can be applied to other species or areas

Citizen Science as a Tool in Biological Recording—A Case Study of Ailanthus altissima (Mill.) Swingle

/pdf/the-differences-in-the-invasiveness-of-some-alien-plant-32ga1t7dic.pdf

The differences in the invasiveness of some alien plant species between continental and coastal part of Croatia

/pdf/rasprostranjenost-invazivne-strane-vrste-pajasena-ailanthus-4a90irev0s.pdf

Rasprostranjenost invazivne strane vrste pajasena [Ailanthus altissima (Mill.) Swingle] po županijama Republike Hrvatske

/pdf/suzbijanje-korova-u-rajcici-55grt4kbd9.pdf

Maja Novak

Papers

Allelopathic potential of segetal and ruderal invasive alien plants

The differences in the invasiveness of some alien plant species between continental and coastal part of Croatia

Rasprostranjenost invazivne strane vrste pajasena [Ailanthus altissima (Mill.) Swingle] po županijama Republike Hrvatske

Suzbijanje korova u rajčici

Invazivne strane korovne vrste kao prijetnja zaštićenim područjima