Abstract
Many plant protection products have been banned due to their toxicity or because pathogens have become resistant to their active substances. Plant resistance inducers are a promising class of compounds that will hopefully reduce dependence on harmful chemicals for plant protection. The efficacy of COS-OGA, a novel elicitor composed of a complex of oligochitosans and oligopectates as active substances, has been assessed in production conditions against powdery mildew on grapevines and on cucumbers. COS-OGA induced a large reduction in the severity of powdery mildew for both crops. At the end of vineyard trials, COS-OGA, at a spraying rate of 37.5gha-1, achieved a considerable reduction in Uncinula necator severity on bunches of grapes with 78% protection in France and 76% protection in Spain. Similarly, in the last evaluation performed in greenhouses to assess the protection of cucumber crops against Sphaerotheca fuliginea, COS-OGA at 25gha-1 LWA (leaf wall area) yielded a 72% reduction in leaf disease severity in Belgium and 69% in Spain. In some trials, the efficacy of the COS-OGA active substance was even higher than the conventional chemical reference.
Original language | English |
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Pages (from-to) | 129-137 |
Number of pages | 9 |
Journal | Crop Protection |
Volume | 65 |
DOIs | |
Publication status | Published - 2014 |
Keywords
- COS-OGA
- Cucumber
- Elicitor
- Erysiphe necator (Schwein) Burrill
- Grapevine
- Sphaerotheca fuliginea Poll
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Dive into the research topics of 'COS-OGA: A novel oligosaccharidic elicitor that protects grapes and cucumbers against powdery mildew'. Together they form a unique fingerprint.Student theses
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Study of the mode of action of COS-OGA, a new class of elicitors of plant innate immunity
Author: van Aubel, G., 13 Jun 2017Supervisor: Van Cutsem, P. (Supervisor), Messiaen, J. (President), Legrève, A. (External person) (Jury), Ongena, M. (External person) (Jury), Hôfte, M. (External person) (Jury) & Mauch-Mani, B. (External person) (Jury)
Student thesis: Doc types › Doctor of Sciences
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