W. magna, grapevine's double-defender from mildew

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Chassieu, 7 March 2019 – Two scientific studies involving the biocontrol product produced by AMOEBA demonstrate that it protects grapevines from downy mildew (Plasmopara viticola)through two additive actions.Used in its lysed form, Willaertia magna C2c makyboth stimulates the grapevines’ natural defences and directly attacks the fungus feared by wine growers.AMOEBA is not currently aware of any other commercially-available biocontrol agent based on a natural substance that elicits a response from the grapevines themselves while also inhibiting germination of downy mildew.“This product represents an alternative that could significantly reduce the use of conventional pesticides, while also protecting wine growers’ yields.”comments Fabrice Plasson, President of AMOEBA.

These results were obtained during experiments performed by subcontracted renowned independent laboratories.The first study demonstrated that Willaertia Magna C2c makyin lysed form elicited an equivalent response to the reference product, which is already on the market.Analysis of expression of 28 plant genes involved in defence against diseases by molecular biology methods (qPFD® method, patented by INRA) indicated increased expression.The second independent study used the reference method involving contact between the pathogen and a solution of the active substance to establish that W. magnahas a direct inhibitory effect on the release and germination of downy mildew zoospores.

These results were produced in the context of the tests performed by AMOEBA to identify biocontrol applications of their product for plant protection.

See the related press release AMOEBA announces that its active substance elicits a response from grapevines and has a direct impact on the germination of downy mildew spores on grapevines.


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