Soil treatment
The present invention relates to compositions and formulations for soil disinfection against a wide spectrum of plant pathogens and pests. More particularly, the formulation comprising (i) peracids, such as peracetic acid and an GO anionic surfactant, such as capryleth-9 carboxylic acid is synergistically effective in treatment of soil to control plant parasitic nematodes and soil-borne plant pathogens such as bacteria, spores and fungi.
1. A method of reducing the concentration of nematodes as a pathogenic microorganism in an agricultural medium comprising soil or sand, the method comprising applying an aqueous composition comprising a peracid and a polyoxyethylene alkylether carboxylic acid or a salt thereof to the agriculture medium at a concentration and for a time sufficient to reduce the concentration of the nematodes.
2. The method of claim 1 , wherein the nematodes are selected from the group consisting of: root knot nematodes; cyst nematodes; root lesion nematodes; and burrowing nematodes.
3. The method of claim 1 , wherein the peracid is peracetic acid.
4. The method of claim 3 , wherein the peracetic acid is an aqueous equilibrium solution comprising a weight ratio of peracetic acid:hydrogen peroxide of between 1:0.01 to 1:14 and a weight ratio of peracetic acid:acetic acid 1:0.2 to 1:19.
5. The method of claim 3 , wherein the peracetic acid concentration is from 3000 ppm to 25,000 ppm.
6. The method of claim 1 , wherein the polyoxyethylene alkylether carboxylic acid concentration is from 250 to 25,000 ppm.
7. The method of claim 1 , wherein the aqueous composition is applied by spraying, drenching, injecting, sprinkling or infusing the aqueous composition into the agricultural medium.
8. The method of claim 1 , wherein the aqueous composition is applied at 1.5 mL/cm 2 of the agricultural medium.
9. The method of claim 1 , wherein the nematode is a root knot nematode selected from the group consisting of: Meloidogyne hapla; Meloidogyne incognita; Meloidogyne enterolobii ; and Meloidogyne mayaguensis.
10. The method of claim 4 , wherein the peracetic acid concentration is from 3000 ppm to 25,000 ppm.
11. The method of claim 10 , wherein the nematodes are selected from the group consisting of: root knot nematodes; cyst nematodes; root lesion nematodes; and burrowing nematodes.
12. The method of claim 3 , wherein the polyoxyethylene alkylether carboxylic acid concentration is from 250 to 25,000 ppm.
13. The method of claim 12 , wherein the aqueous composition is applied by spraying, drenching, injecting, sprinkling or infusing the aqueous composition into the agricultural medium.
14. The method of claim 13 , wherein the aqueous composition is applied at 1.5 mL/cm 2 of the agricultural medium.
15. The method of claim 14 , wherein the nematode is a root knot nematode selected from the group consisting of: Meloidogyne hapla; Meloidogyne incognita; Meloidogyne enterolobii ; and Meloidogyne mayaguensis.
16. The method of claim 2 , wherein the polyoxyethylene alkylether carboxylic acid concentration is from 250 to 25,000 ppm.
17. The method of claim 16 , wherein the aqueous composition is applied by spraying, drenching, injecting, sprinkling or infusing the aqueous composition into the agricultural medium.
18. The method of claim 17 , wherein the aqueous composition is applied at 1.5 mL/cm 2 of the agricultural medium.
19. The method of claim 1 , wherein the method reduces the concentration of nematodes by at least 40%.