Improved granular formulation of neem seed extract and its...

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Details

A01N 65/26 (2009.01) A01N 25/12 (2006.01) A01N 43/90 (2006.01) A01P 7/04 (2006.01)

Patent

CA 2556943

The present invention relates to an improved granular formulation of neem seed extract containing azadirachtins having enhanced storage stability, gradual release of azadirachtins for application to plant rhizosphere comprising of inert particulate as a carrier, at least a lipophilic substance as deactivator/binder, colorant and neem seed extract comprising azadirachtins providing gradual release of azadirachtins and effectively at the point of application. The invention also relates to a process for the preparation of the said formulation by coating the carrier with a lipophilic substance, subsequently impregnating the coated carrier with neem seed extract followed by coating with a colorant and finally lipophilic substance, by spraying and drying at a temperature below 50~C.

L'invention concerne une préparation granulaire améliorée d'extrait de graines de neem contenant des azadirachtines possédant une stabilité de stockage renforcée et permettant la libération graduelle des azadirachtines pour une application à la rhizosphère. Cette préparation comprend des particules inertes en tant que support, au moins une substance lipophile en tant que désactivateur/liant, un colorant et un extrait de graines de neem comprenant des azadirachtines, cette préparation permettant la libération graduelle et efficace au point d'application des azadirachtines. L'invention concerne également un procédé de préparation de cette préparation par enrobage du support avec une substance lipophile, suivi de l'imprégnation du support enrobé avec l'extrait de graines de neem et de l'enrobage avec un colorant puis enfin une substance lipophile, par pulvérisation et séchage à une température inférieure à 50 ·C.

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