Treatment for dutch elm disease

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 15/31 (2006.01) A01N 63/04 (2006.01) A61K 38/16 (2006.01)

Patent

CA 2285038

A preventative treatment for Dutch elm disease is disclosed which provides susceptible elm trees with induced resistance to Dutch elm disease-causing fungi such as Ophiostoma ulmi. The treatment comprises administering to a susceptible elm tree an amount of an elicitor effective to cause a defence reaction in the tree. The defence reaction comprises a cascade of events including accumulation by the tree of mansonones, which are sesquiterpene quinones having antifungal properties. The preferred elicitor for use as a treatment for Dutch elm disease is a novel elicitor isolated from cultures of O. ulmi. The preferred elicitor is non toxic and heat stable and is shown to be effective for inducing resistance to Dutch elm disease in susceptible elm trees.

Traitement préventif contre la maladie hollandaise de l'orme conférant aux ormes susceptibles d'être atteints par la maladie une résistance induite contre les champignons provoquant cette maladie, tels qu'Ophiostoma ulmi. Ce traitement consiste à administrer à l'orme une quantité d'agent provocateur efficace pour causer une réaction de défense dans l'arbre. Cette réaction de défense est composée d'un enchaînement d'événements, y compris l'accumulation par l'arbre de mansonones, qui sont des quinones de sesquiterpène possédant des propriétés antifongiques. L'agent provocateur préféré est un nouvel agent isolé depuis des cultures de O.ulmi. Cet agent provocateur est non toxique, stable à la chaleur et s'avère efficace pour provoquer une résistance chez l'orme susceptible d'être atteint par la maladie hollandaise de l'orme.

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