home    about    browse    search    latest    help 
Login | Create Account

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

Thuerig, Barbara; Ramseyer, Justine; Hamburger, Matthias; Oberhänsli, Thomas; Potterat, Olivier; Schärer, Hans-Jakob and Tamm, Lucius (2016) Efficacy of a Juncus effusus extract on grapevine and apple plants against Plasmopara viticola and Venturia inaequalis, and identification of the major active constituent. Pest Management Science, 72 (9), pp. 1718-1726.

[img] PDF - English
Limited to [Depositor and staff only]

669kB

Online at: http://onlinelibrary.wiley.com/doi/10.1002/ps.4199/abstract

Summary

BACKGROUNd
There is growing demand to replace chemical pesticides with alternatives owing to concerns related to impacts on human health and the environment. Plant-derived plant protection products could provide sustainable and environmentally friendly alternatives to chemical products. The aim of this study was to identify plant and fungal extracts with so far unknown activity against important plant pathogens by in vitro screening of a library of more than 3000 extracts.
RESULTS
Several plant extracts with promising in vitro fungicidal activity (MIC100 ≤ 50 µg mL−1) towards one or several of the investigated pathogens (Venturia ineaqualis, Phytophthora infestans, Plasmopara viticola) were identified by the screening. One of the hits, an ethyl acetate extract of Juncus effusus L. medulla, was further investigated, and dehydroeffusol (DHEF) was identified as its main active constituent. On susceptible grapevine and apple seedlings, efficacies of up to 100% were reached with the extract (EC50 123 or 156 µg mL−1) and with DHEF (EC50 18 or 21 µg mL−1) against P. viticola and V. inaequalis respectively.
CONCLUSIONS
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


EPrint Type:Journal paper
Keywords:Juncus effusus; dehydroeffusol; plant extract; fungicide; downy mildew; apple scab, Department of Crop Sciences, Crop Protection
Subjects: Crop husbandry > Production systems > Fruit and berries
Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries > Viticulture
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Plant Protection and Biodiversity
Switzerland > Other organizations
DOI:10.1002/ps.4199
Deposited By: Thürig, Dr. Barbara
ID Code:32110
Deposited On:12 Sep 2017 11:27
Last Modified:12 Sep 2017 13:05
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

Repository Staff Only: item control page