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Physiological activity spectra of existing graminicides and the new herbicide 2‐(2‐benzothiazolyl‐oxy)‐ N ‐methyl‐ N‐ phenylacetamide (mefenacet)
Author(s) -
FEDTKE C.
Publication year - 1987
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1987.tb00757.x
Subject(s) - chemistry , amide , enzyme , stereochemistry , inhibitory postsynaptic potential , biochemistry , biology , neuroscience
Summary inhibitory activities of existing graminicides on root regeneration from monocotyledonous (oat) and dicotyledonous (soybean) plant cuttings in the light, in the dark and on algal growth were compared with the respective inhibitory activities of the new herbicide 2‐(2‐benzothiazo‐lyl‐oxy)‐N‐methyl‐ N ‐phenylacetamide (mefenacet). The mefenacet activity spectrum resembled that of the α‐chloroacetamide herbicides. Herbicide groups of other structure‐activity can be distinguished by their distinct activity spectrum. The mono‐oxygenase inhibitors piperonyl but‐oxide (PBO) and 1‐aminobenzotriazole (ABT) were found to antagonize the inhibitory activities of herbicides from the thiolcarbamate, α‐chloroacetamide, and oxyacetic acid amide structure groups in the oat rooting and leaf growth tests. The critical evaluation of the presently available information on graminicide and safener mode of action suggests the concept that lipid biosynthesis on the physiological level and mono‐oxygenase type enzymes on the biochemical level may hold the target sites for many of the graminicides and safeners discussed.