Biogenic control and limitation of the proliferation of...

A - Human Necessities – 01 – N

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A01N 57/12 (2006.01) A01N 47/28 (2006.01) C05B 15/00 (2006.01) C05G 3/06 (2006.01)

Patent

CA 2333982

The invention relates to the combined use of (a) phosphorus compounds with at least partially lipophilic organic radicals and (b) urea and/or urea derivatives in selected proportions of (a):(b) as soil additives for biological control of phytoparasitic earth nematodes by increasing the correspondingly antagonistic potential of the soil, especially by promoting the growth of antagonistic and/or netamaticidal rhizospheric bacteria and/or corresponding mycorrhiza strains, while at the same time strengthening the growth of autochtonal plants. Preferably, the substance mixtures promoting bacterial growth are introduced into the root area of the plants in the form of an aqueous preparation in combination with phytocompatible emulsifiers before and/or during the raising of said plants. The components of subclasses (a) and (b) are used in such proportions that the weight ratio of C to N does not exceed 6 and is preferably 5.

L'invention concerne l'utilisation (a) de composés phosphorés présentant des radicaux organiques au moins en partie lipophiles avec (b) de l'urée et/ou des dérivés d'urée dans des rapports de quantités sélectionnés (a):(b), en tant qu'additifs pour le sol, servant à lutter biologiquement contre les nématodes du sol parasites des plantes. A cet effet, on renforce le potentiel antagoniste du sol, notamment en renforçant la croissance de bactéries de la rhizosphère antagonistes et/ou nématicides et/ou de souches de mycorrhize, tout en renforçant la croissance des cultures de plantes du sol. Les mélanges de matières utiles renforçant la croissance bactérienne sont introduits au niveau des racines des plantes, de préférence sous forme de préparations aqueuses, avec des émulsifiants phytocompatibles, avant et/ou pendant la culture des plantes. Les composants des sous-classes (a) et (b) sont utilisés dans des rapports de quantités tels que le rapport en poids C:N ne dépasse pas 6 et de préférence 5.

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