Gliocladium roseum strains useful for the control of fungal...

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A01N 63/04 (2006.01) C12N 1/14 (2006.01)

Patent

CA 2345715

A biocontrol agent and a method of use thereof for controlling diseases caused by fungal pathogens in plants. In one aspect of the invention, novel strains of Gliocladium roseum exhibiting antagonistic effects against plant pathogens are used as biocontrol agents. Most preferably, a novel strain Gliocladium roseum ACM941(ATCC #74447) is used in a treatment effective against fungal pathogens of plants. The biocontrol agent of the present invention may be used in the treatment of seeds, soil or plants to effectively protect against plant diseases caused by fungal pathogens. The biocontrol agent is particularly effective against fungal infections of pea, bean, canola, wheat, barley, beet, broccoli, brussel sprouts, cabbage, canola, cauliflower, cucumber, egg plant, pepper, tomato, marigold and other horticultural and ornamental plants, caused by Alternaria alternata, Aphanomyces euteiches, Ascochyta spp., Bipolaris sorokiniana, Fusarium graminearum, Fusarium oxysporum f.sp. pisi, Fusarium solani f.sp. pisi, Fusarium spp. Mycosphaerella pinodes, Pythium spp., Rhizopus sp., Rhizoctonia solani, and Sclerotinia sclerotiorum.

Cette invention concerne un agent de lutte biologique, ainsi qu'un procédé d'utilisation de celui-ci, qui permet de lutter contre les maladies causées par des pathogènes fongiques chez les plantes. Sous un aspect, cette invention concerne de nouvelles souches de Gliocladium roseum qui possèdent des effets antagonistes contre les pathogènes des plantes, et qui sont utilisées comme agents de lutte biologique. On utilise de préférence une nouvelle souche Gliocladium roseum ACM941 (ATCC #74447) qui offre un traitement efficace contre les pathogènes fongiques chez les plantes. Cet agent de lutte biologique peut être utilisé dans le traitement de gaines, de sols ou de plantes afin d'offrir une protection efficace contre les maladies des plantes causées par des pathogènes fongiques. Cet agent de lutte biologique est particulièrement efficace contre les infections fongiques des petits pois, des haricots, du colza canola, du blé, de l'orge, des betteraves, des brocolis, des choux de Bruxelles, des choux, du colza canola, des choux-fleurs, des concombres, des aubergines, des poivrons, des tomates, des oeillets d'Inde et d'autres plantes d'horticulture ou d'ornement atteintes d'une infection par Alternaria alternata, Aphanomyces euteiches, Ascochyta spp. Bipolaris sorokiniana, Fusarium graminearum, Fusarium oxysporum f.sp. pisi, Fusarium solani f.sp. pisi, Fusarium spp. Mycosphaerella pinodes, Pythium spp. Rhizopus sp., Rhizoctonia solani et Sclerotinia sclerotiorum.

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