Efficacy of a Juncus effusus extract on grapevine and apple plants against Plasmopara viticola and Venturia inaequalis, and identification of the major active constituent

Abstract

Our results demonstrate that plants can provide promising alternatives for integrated and organic farming. J. effusus shows high efficacy at low concentrations and, as an abundant perennial species, is an interesting candidate for the development of a novel plant protection product. © 2015 Society of Chemical Industry.

A Plant Extract Acts Both as a Resistance Inducer and an Oomycide Against Grapevine Downy Mildew

“…It prevented zoospore release from sporangia, and inhibited their swimming in in vitro tests. Similar studies pointing out toxic effect of PEs against P. viticola , as for Juncus effusus ( Thuerig et al, 2016 ) or pine extracts ( Gabaston et al, 2017 ). Oomycides can have different modes of action, such as the alteration of zoospore energy production.…”

Reducing copper use in the environment: the use of larixol and larixyl acetate to treat downy mildew caused by Plasmopara viticola in viticulture

“…Larch extract and its active compounds larixyl acetate and larixol showed high efficacies against P. viticola in vitro and in planta under semi‐controlled conditions at low concentrations (MIC 100 of 6‐24 µg mL ‐1 and EC 50 of 0.1‐0.6 mg mL ‐1 ), which is one of several prerequisites of an economically viable plant protection product based on plant extracts. Other plant extracts were comparable at similar concentrations, for example Juncus effusus (common rush) extract and its active ingredient dehydroeffusol (DHEF), extracts of Abies sibirica (Siberian fir), Inula viscosa (false yellowhead), Yucca schidigera (Mojave yucca), Melaleuca alternifolia (narrow‐leaved tea‐tree), and Quillaja saponaria (soapbark), whereas 10 to 50 times higher concentrations were necessary for extracts of Glycyrrhiza glabra (Liquorice), Salvia officinalis (sage), Solidago virgaurea (European goldenrod) or Rheum rhabarbarum (rhubarb) …”

“…Optimised extraction processes as well as high availability and low price of raw material are of crucial importance for the economic viability of botanical plant protection products. For example, low extraction yields and/or high costs combined with limited availability of raw material prevented further development of extracts of R. rhabarbarum and J. effusus despite their excellent efficacies. In the present study, we have shown that both the bark of L. decidua and larch turpentine are suitable materials for the production of a standardised larch extract.…”

“…Other studies have identified other plant extracts with promising activity against P. viticola , including extracts of Glycyrrhiza glabra, Inula viscosa, Vitis vinifera canes and Juncus effusus, and Puopulo et al described high efficacy of cells and culture filtrate of the bacterium Lysobacter capsici . In the research project ForestSpeCs, we succeeded in identifying five tree species, Larix decidua Mill., Larix gmelinii (Rupr.)…”

Dehydroeffusol inhibits hypoxia-induced epithelial–mesenchymal transition in non-small cell lung cancer cells through the inactivation of Wnt/β-catenin pathway

“…Dehydroeffusol (DHE) is a phenanthrene compound isolated from the Traditional Chinese Medicine (TCM) Juncus effusus. In vitro and in vivo biological evaluation reveal that DHE is a bioactive phytochemical with broad activities, including antimicrobial [10,11], anxiolytic and sedative [12] and anti-spasmogenic [13]. In recent years, DHE has been demonstrated to possess anticancer effects through several cancer-associated signaling pathways, such as NF-κB, β-catenin, and endoplasmic reticulum stress [14][15][16][17].…”