US 4,130,410 AGrant
Herbicidal Use of Substituted Phenyl Phosphinic Acids
Issue Date:1978-12-19
•8 Claims
Abstract
Substituted phenyl phosphinic acids and derivatives thereof exhibit herbicidal activity, especially when used to control broadleaf weeds.
Metadata
Assignee
- Monsanto Company
Inventor
- Milton J. Sabacky
Application Information
Application Number:US 7736258
Filing Date:1977-03-02
Priority Date:1975-10-09
Art Unit:124
Classifications
IPC:
A01N 936
Field of Search:
7186;87
Patent Drawings
This patent does not have any drawings.
Claims
What is claimed is:
1. A method of selectively preventing the growth of undesirable broadleaf plants in the presence of narrowleaf plants which comprises applying to the plant system a herbicidally effective amount of a compound having the formula ##STR5## wherein R is selected from the group consisting of primary and secondary alkyl and trihalomethyl; R.sub.1 is selected from the group consisting of hydrogen, primary and secondary alkyl, ammonium, alkyl ammonium and phenyl substituted by halo, lower alkoxy, nitro and trifluoromethyl; and X, Y and Z are independently selected from the group consisting of hydroxy, halo, trihalomethyl, amino, primary and secondary alkyl, lower alkoxy and thioalkyl; and each n is independently zero or one.
2. A method according to claim 1 wherein R is selected from the group consisting of primary and secondary alkyl.
3. A method according to claim 2 wherein R is methyl.
4. A method according to claim 2 wherein R.sub.1 is hydrogen.
5. A method according to claim 4 wherein X is methoxy at the 2 position of the benzene nucleus.
6. A method of selectively preventing the growth of undesirable broadleaf plants in the presence of narrowleaf plants which comprises applying to the plant system a herbicidally effective amount of a compound having the formula ##STR6## wherein R is selected from the group consisting of primary and secondary alkyl; R.sub.1 is selected from the group consisting of hydrogen, primary and secondary alkyl, ammonium, alkyl ammonium, and phenyl substituted by halo, lower alkoxy, nitro and trifluoromethyl; and X, Y and Z are independently selected from the group consisting of primary and secondary alkyl, lower alkoxy and trihalomethyl; and each n is independently zero or one.
7. A method according to claim 1 wherein said narrowleaf plants are wheat, rice and sorghum.
8. A method according to claim 6 wherein said narrowleaf plants are wheat, rice and sorghum.
Patent Citations (3)
| Patent | Date | Inventor | Cited By |
|---|---|---|---|
| US2927014 | 1960-03-01 | Goyette | |
| US3346669 | 1967-10-01 | Regel | |
| US3733192 | 1973-05-01 | Harris et al. |
Non-Patent Literature (1)
- Denham et al., J. Org. Chem., vol. 23 (1958) pp. 1298-1301.