Compositions and method for controlling fungal disease in plants
AssigneeState of Israel, Ministry of Agriculture, Agricultural Research Organization, The Volcani Center
InventorsNoach Ben-Shalom, David Platt
Life of this patent
Estimating the term…
Abstract
Materials comprised of linked, repeat units of beta glucosamine, having a molecular weight in the range of 400 to 10,000 are highly effective in controlling fungus infestation in agricultural crops, both pre-harvest and post-harvest. The antifungal material is preferably combined with a mildly acidic solvent to produce a composition having a slightly acidic, or near neutral pH. When the antifungal material is combined with a chitosan matrix, a synergistic interaction occurs which greatly enhances the effect of the resultant composition. Also disclosed is a method for producing a chitin or chitosan based material which will dissolve in water having a neutral pH.
Claims7
A composition for controlling fungal disease in plants, said composition comprising by weight:
- 10-25% of an anti-fungal material selected from the group consisting of chitosan derived oligomers having a molecular weight in the range of 4,000 to less than 10,000 daltons, chitin derived oligomers having a molecular weight in the range of 500-2,000 daltons, and mixtures thereof;
- and
- 9- 75% of chitosan having a molecular weight of approximately 200,000 daltons.
A composition for controlling fungal disease in plants comprising synergistically effective amounts of:
- an anti-fungal material selected from the group consisting of chitosan derived oligomers having a molecular weight in the range of 4,000 to less than 10,000 daltons, chitin derived oligomers having a molecular weight in the range of 500-2,000 daltons, and mixtures thereof, and
- chitosan having a molecular weight of approximately 200,000 daltons.
A method of controlling fungus disease in plants, said method comprising the step of applying a fungus control composition to said plants, said composition comprising:
- 10-25% of an anti-fungal material selected from the group consisting of chitosan derived oligomers having a molecular weight in the range of 4,000 to less than 10,000 daltons, chitin derived oligomers having a molecular weight in the range of 500-2,000 daltons, and mixtures thereof, and
- 90-75% of chitosan having a molecular weight of approximately 200,000 daltons.
Dependencies are inferred from the claim text.