Neuere Ergebnisse zur Struktur-Aktivitäts-Beziehung/ Some New Results Concerning Structure-Activity Relationships of Herbicides

Abstract

Abstract Relative activities and sensitivities towards twelve 1,2,4-triazinones were determined by conventional dilution techniques. The pI50-values of photosynthesis inhibition were found in a very narrow range (6.4 -6.6) whereas their physical properties differed widely (RM , log PO/W * log PSE , log (1/c) W). The question was whether the physical parameters showed any correlation with the relative activities and relative sensitivities which differed very widely (up to 50 fold). It was found that only the water solubility (log (1/c) W) showed some correlation with activity and no correlation could be detected between the chemical structures and the activities or sensitivities.