NOVEL PLANT GROWTH REGULATOR COMPOSITIONS, METHODS OF PREPARATION AND USE THEREOF

摘要

Suspension concentrate compositions are disclosed for delivering S-(+)-Abscisic acid either alone or in combination with a second plant growth regulator to crop seed prior to planting as well as for foliar, soil drench, in-furrow and sprench (foliar spray and soil drench) applications are disclosed. The compositions, when properly combined in an aqueous carrier and processed through wet milling to achieve the desired particle size, will result in stable compositions that are desirable for treating crop seeds.

主权项

1. A method of treating a seed comprising applying an effective amount of an aqueous suspension concentrate composition to a seed, wherein the composition comprises:
(i) from about 5 to about 40% S-(+)-Abscisic acid suspended as micro particles wherein at least 90% of the micro S-(+)-Abscisic acid particles are less than 10 micrometers in diameter; (ii) from about 0.1 to about 1.0% of at least one non-ionic polymeric surfactant that is a difunctional block copolymer surfactant with terminal secondary hydroxyl groups; (iii) from about 0.5 to about 4.0% of at least one non-ionic polymeric surfactant that is a difunctional block copolymer surfactant with terminal primary hydroxyl groups; (iv) from about 0.5 to about 5.0% of at least one vinylpyrrolidone/vinylacetate copolymer wherein the molar ratio of vinylpyrrolidone to vinylacetate is from about 30:70 to about 70:30; (v) from about 5 to about 20% of at least one diol; (vi) from about 0.045 to about 0.2% of at least one polysaccharide or cellulose derivative; (vii) from about 0.01 to about 0.5% of polydimethylsiloxane; (viii) at least one preservative selected from the group consisting of methyl p-hydroxy benzoate, propyl p-hydroxy benzoate and potassium sorbate; (ix) at least one chelating agent selected from the group consisting of EDTA, EDTA salts, citrates and gluconates; and (x) at least one antioxidant selected from the group consisting of propyl gallate, ascorbic acid and its salts and tert-butylhydroquinone,
wherein all percentages are based on the total weight of the composition.