No abstract

be dependent upon the formation of X since all carbamates studied, active or inactive, give a similar compound. The formation of X may be taken as evidence that these compounds penetrated the plant, at least to the site of their conversion to X. Thus, the lack of herbicidal activity of carbamates analogous to barban cannot be blamed on penetration failure.

No abstract

No abstract

The symbol 2,4-D* is used to designate 2,4-D-1-C*, that is, 2,4-D labeled in the carboxyl position with C'14. Radioactive forms of the other compounds studied are similarly designated.4 Carboxyl-carbon-labeled 2,4-D and 2,4,5-T and CU-Iabeled urea were purchased from 'I'racerlab, Inc. Aminotriazole (3-amino-1,2,4-triazole-5-C 14)was supplied by the American Chemical Paint Co., ethylene-carbon-labeled maleic hydrazide by the Naugatuck Chemical Division of the U. S. Rubber Co., and ring-labeled monuron by E. 1.