Improved mixture of useful materials for stock culture in...

A - Human Necessities – 01 – N

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A01N 57/12 (2006.01) A01N 25/30 (2006.01) A01N 43/16 (2006.01) A01N 47/28 (2006.01) A01N 63/04 (2006.01)

Patent

CA 2348952

Disclosed is the use of (a) phosphorus compounds containing at least partially lipophilic organic radicals with (b) urea and/or urea derivatives in selected ratios (a): (b). According to the invention, (c) oligomer and/or polymer chitosans are added in a simultaneous or time-variable manner in a preferably aqueous form of preparation as an additive to the soil for biological control of phytoparasitic nematodes in said soil by reinforcing the antagonistic potential of the soil, especially by reinforcing the growth of antagonistic and/or nematicide rhizospheric bacteria and/or corresponding strains of myccorhiza, while at the same time reinforcing the growth of indigenous stock cultures. The mixtures of useful materials that reinforce bacterial growth are introduced into the root area of plants in the form of a preferably aqueous preparation using phytocompatible emulsifiers before and during stock culture. Subclass constituents are used in specific ratios, whereby the weight ratio of C: N does not exceed 6 and, preferably, does not exceed 5.

L'invention concerne l'utilisation de (a) composés de phosphore présentant des radicaux organiques au moins en partie lipophiles avec (b) de l'urée et/ou des dérivés d'urée dans des rapports quantitatifs sélectionnés (a): (b). Selon l'invention, on ajoute également de façon simultanée et/ou décalée dans le temps (c) des chitosanes oligomères et/ou polymères, formulés de préférence sous forme hydrosoluble, en tant qu'additif pour le sol, servant à lutter biologiquement contre des nématodes phytoparasites du sol par renforcement du potentiel du sol antagoniste correspondant, notamment par renforcement de la croissance de bactéries de la rhizosphère antagonistes et/ou nématicides et/ou de souches de mycorrhizes correspondantes, et par renforcement simultané de la croissance des cultures de plantes indigènes. Les mélanges de matières valorisables renforçant la croissance de bactéries sont introduits, de préférence sous forme de préparation aqueuse, au niveau des racines des plantes, avant et/ou pendant la culture des plantes, avec des émulsifiants phytocompatibles. Les composants des classes secondaires (a) et (b) sont utilisés dans des rapports quantitatifs tels que le rapport en poids C : N est inférieur à 6 et de préférence à 5.

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