US 2003/0119672 A1 · Bioagent compositions for plant care

Abstract

Disclosed are bioagent compositions for plant care which can be used for treatment of plants and seeds. Such treatment serves to inhibit the activity of plant pathogens against the treated plants, stimulate natural plant immunity against such pathogens and provides plant growth biostimulation. The compositions comprise a chitosan polymer which can either be in the form of particles of microcrystalline chitosan which are in a composition of pH greater than 6.9, or in the form of a chitosan salt gel which are in a composition of pH of from 5.0 to 6.9. In either form, the chitosan polymer has specified molecular weight, polydispersity degree and degree of deacetylation characteristics. Preferably the chitosan polymer has a bimodal molecular weight distribution and contains a fraction of water-soluble oligoaminocarbohydrates. The characteristics of the chitosan polymer used in the compositions are obtained by the step-wise neutralization of, and chitosan preciptation from, acid solutions of chitosan under controlled conditions.

Claims10

Dependent claims

A bioagent composition for plant care, which composition is in liquid or solid state and which comprises at least 0.00 1% by weight of chitosan polymer, wherein said chitosan polymer is in a form selected from:

A) particles of microcrystalline chitosan at a composition pH of greater than 6.9;
and
B) gel-form chitosan salt at a composition pH of from 5.0 to 6.9;
wherein said chitosan polymer has an average molecular weight of not less than 10 kD, a polydispersity degree not lower than 2 and a deacetylation degree not lower than 65%.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/292,233Filed 12 Nov 2002

Priority

PL P-34013212 May 2000

Published

26 Jun 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

A01N 43/16
Six-membered rings: with oxygen as the ring hetero atom
C08B 37/003
2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof: chitin, i.e. 2-acetamido-2-deoxy--D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan,…
C08L 5/08
Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00: chitin; Chondroitin sulfate; Hyaluronic…
A01N
Preservation of bodies of humans or animals or plants or parts thereof

Bioagent compositions for plant care

Life of this patent

Bioagent compositions for plant care

Life of this patent

Abstract

Claims10