Claims
- 1. A method of extending the soil life of a thiocarbamate having the formula ##STR21## in which R.sup.1, R.sup.2, and R.sup.3 are independently C.sub.2 -C.sub.4 alkyl with the proviso that wherein R.sup.1 is ethyl and R.sup.2 is propyl, R.sup.3 is other than propyl;
- which comprises applying to the soil containing said thiocarbamate or to which said thiocarbamate is to be applied an effective amount of an organophosphorus compound having the formula ##STR22## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.4 alkoxy, and C.sub.1 -C.sub.4 alkylthio,
- R.sup.5 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.2 alkyl,
- R.sup.6 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, and C.sub.2 -C.sub.4 alkoxyalkyl,
- R.sup.7 is selected from the group consisting of hydrogen and methyl; and
- R.sup.8 is selected from the group consisting of hydrogen and methylthio.
- 2. A method according to claim 1 wherein R.sup.4 is selected from the group consisting of ethyl, C.sub.1 -C.sub.2 alkoxy and C.sub.1 -C.sub.2 alkylthio; R.sup.5 is hydrogen; R.sup.7 is selected from the group consisting of hydrogen, paramethyl or meta-methyl; and R.sup.8 is selected from the group consisting of hydrogen o para-methylthio.
- 3. A method according to claim 2 wherein R.sup.4 is selected from the group consisting of ethoxy or methylthio; R.sup.6 is selected from the group consisting of n-butyl, sec-butyl, iso-butyl or ethoxyethyl; and R.sup.8 is hydrogen.
- 4. A method according to claim 3 wherein the thiocarbamate is S-propyl-N,N-dipropyl thiocarbamate or S-ethyl N,N-di-isobutyl thiocarbamate.
- 5. A method according to claim 4 wherein the organophosphorus compound is selected from the group consisting of O-ethyl-O-phenyl-sec-butyl phosphoroamidothioate; N-2-ethoxyethyl-O-phenyl-O-ethyl phosphoramidothioate; N-isobutyl-O-ethyl-O-phenyl phosphoroamidothioate; or N-n-butyl-Ophenyl-S-methyl phosphoroamidodithioate.
- 6. A method according to claim 5 wherein the organophosphorus compound is either N-(2-ethoxyethyl)-O-phenyl-O-ethyl phosphoroamidothioate or O-ethyl-O-phenyl-sec-butyl phosphoroamidothioate.
- 7. A method according to claim 2 in which the weight ratio of thiocarbamate compound to organophosphorus compound is from about 1:1 to about 5:1.
- 8. A method according to claim 1 further comprising the application of a non-phytotoxic antidotally effective amount of either N,N-diallyl dichloroacetamide or 2,2,5-trimethyl-N-dichloroacetyl oxazolidine.
- 9. A method according to claim 4 wherein the thiocarbamate herbicide is either S-ethyl N,N-diisobutyl thiocarbamate or S-propyl N,N-dipropyl thiocarbamate and the antidote is N,N-diallyl dichloroacetamide.
- 10. A method according to claim 9 wherein the weight ratio of said thiocarbamate herbicide to said antidote is from about 3:1 to about 25:1.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of Application Ser. No. 495,288, filed May 16, 1983, now abandoned which is a continuation of application Ser. No. 350,896, filed Feb. 22, 1982, now abandoned; which in turn is a continuation of application Ser. No. 163,653, filed June 27, 1980, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
964793 |
Jul 1964 |
GBX |
Non-Patent Literature Citations (3)
Entry |
Byers et al., Chem. Abst. vol. 87 (1977), 128777x. |
Nash. Weed Sci., vol 16 (1968), pp. 74-77. |
Kozlova et al., Chem. Abst. vol. 83 (1975), 58945s. |
Continuations (2)
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Number |
Date |
Country |
Parent |
350896 |
Feb 1982 |
|
Parent |
163653 |
Jun 1980 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
495288 |
May 1983 |
|