Herbicidal compositions are provided which contain combinations of glyphosate [N-(phosphonomethyl)glycine] and sulfuric acid, and/or combinations of glyphosate, sulfuric acid and a chalcogen-containing compound of the formula R.sub.1 --CX--R.sub.2 wherein X is a chalcogen compound of the formula R.sub.1 --CX--R.sub.2 wherein X is selected from oxygen and sulfur, R.sub.1 and R.sub.2 are independently selected from hydrogen, monovalent organic radicals, NR.sub.3 R.sub.4 and NR.sub.5, at least one of R.sub.1 and R.sub.2 being NR.sub.3 R.sub.4 or NR.sub.5, R.sub.3 and R.sub.4 are independently selected from hydrogen and monovalent organic radicals, and R.sub.5 is a divalent organic radical. Such compositions contain reaction products of glyphosate and sulfuric acid, and/or of glyphosate, sulfuric acid and the chalcogen compound, and they may also contain excess glyphosate or sulfuric acid. They effect more rapid, more thorough, broader spectrum vegetation control, and are more stable chemically and less toxic than other glyphosate-containing herbicides.
RELATED APPLICATIONS
This application is a continuation of application Ser. No. 887,288, HERBICIDE AND METHOD, filed May 22, 1992, now abandoned, which is a division of application Ser. No. 306,529, HERBICIDE AND METHOD, filed Feb. 3, 1989, now U.S. Pat. No. 5,116,401, which is a continuation of Ser. No. 890,076, HERBICIDE AND METHOD, filed Jul. 24, 1986, now abandoned, which is a continuation-in-part of applications, Ser. No. 771,260, HERBICIDAL COMPOSITIONS AND METHODS OF USE, filed Aug. 30, 1985, now abandoned; Ser. No. 673,358, METHODS FOR HYDROLYZING POLYSACCHARIDES AND COMPOSITIONS USEFUL THEREIN, filed Nov. 20, 1984, now U.S. Pat. No. 4,664,717; Ser. No. 442,296, SYSTEMIC HERBICIDAL COMPOSITIONS AND METHODS OF USE, filed Nov. 17, 1982, now abandoned; Ser. No. 444,667, METHODS FOR CONTROLLING VEGETATION, filed Nov. 26, 1982, now abandoned; and Ser. No. 453,496, ACID-CATALYZED REACTIONS AND COMPOSITIONS FOR USE THEREIN, filed Dec. 27, 1982, now U.S. Pat. No. 4,910,179 the latter of which is a continuation-in-part of applications Ser. No. 331,001, NON-CORROSIVE UREA-SULFURIC ACID COMPOSITIONS, filed Dec. 15, 1981, now U.S. Pat. No. 4,402,852; Ser. No. 330,904, NON-CORROSIVE UREA-SULFURIC ACID REACTION PRODUCTS, filed Dec. 15, 1981, now U.S. Pat. No. 4,404,116; Ser. No. 318,629, METHODS OF PRODUCING CONCENTRATED UREA-SULFURIC ACID REACTION PRODUCTS, filed Nov. 5, 1981, now U.S. Pat. No. 4,445,925; Ser. No. 318,368, TOPICAL FERTILIZATION METHODS AND COMPOSITIONS FOR USE THEREIN, filed Nov. 5, 1981, now U.S. Pat. No. 4,447,253; and Ser. No. 318,343, METHODS FOR PRODUCING UREA-SULFURIC ACID REACTION PRODUCTS, filed Nov. 5, 1981, now U.S. Pat. No. 4,397,675.
Glyphosate liquid formulations containing surfactants, especially of the amine type, often undergo a yellowish-brown discoloration on storage. This may be inhibited or prevented by incorporating a small amount of urea.
A method and composition for inhibiting the growth of a weed is described. The herbicidal composition comprises an agriculturally-acceptable carrier in combination with a compound of Formula (I): ##STR1## wherein R.sup.1 is alkylcarbonyl or arylcarbonyl; R.sup.2 is alkyl or H; R.sup.3 is H, OH or alkoxy; R.sup.4 is H or OH; and R.sup.5 is H, OH or alkoxy.
