Weed control compositions containing drechslera - spp. or...

C - Chemistry – Metallurgy – 12 – N

Patent

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71/4.5, 195/34.7

C12N 1/14 (2006.01) A01N 63/00 (2006.01) A01N 63/04 (2006.01)

Patent

CA 2003461

Certain new strains of Drechslera spp. have been found as pathogens effective for the control of barnyard grass (Echinochloa), a troublesome grass, in the cultivation of economic crops such as rice and wheat. Weed control compositions containing living fungal cells of one of such strains or a metabolite of the strain and weed control methods using the microorganism or the metabolite of Drechslera spp. thereof are provided. The present invention has made it possible to control barnyard grass without adversely affecting economic crops. Further, the pathogens useful in the practice of this invention are free of the potential problem of environmental contamination inherent to synthesized organic herbicides and can be used safely.

ertaines nouvelles souches de Drechslera spp. se sont révélées des pathogènes efficaces pour lutter contre l'échinochléa pied-de-coq, une mauvaise herbe envahissante, dans la culture de plantes d'une grande importance économique comme le riz et le blé. La divulgation s'applique à des compositions renfermant des cellules fongiques vivantes appartenant à l'une de ces souches, ou un métabolite de la souche en question, destinées à lutter contre la mauvaise herbe et à des méthodes de lutte faisant appel au microorganisme ou au métabolite de Drechslera spp. La présente invention permet de lutter contre l'échinochléa pied-de-coq sans causer de dommages aux cultures d'importance économique. En outre, les pathogènes utilisés dans le cadre de cette invention sont exempts du problème éventuel de contamination de l'environnement inhérent aux herbicides organiques de synthèse et peuvent être utilisés sans danger.

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