Varietal sensitivity to herbicides in winter wheat using very fast fluorescence induction
1999
Flasarova, M. (Zemedelsky Vyzkumny Ustav, Kromeriz (Czech Republic)) | Naus, J. | Matouskova, M.
The very fast fluorescence induction (vfFI) of chlorophyll a was used to test sensitivity of eight winter wheat varieties to three herbicides [Bromotril (a.i. bromoxynil), Bladex 50 SC (a.i. cyanazine), IPU Stefes (a.i. isoproturon)]. The purpose of conducted experiments was to assess: 1) if a single application of herbicides affected the plant state during its further growth, 2) if individual varieties differed in responses to these substances, and 3) how the changes of vfFI parameters are related to potential changes of biometric parameters. The greatest changes in both fluorescence and yield were caused by Bladex 50 SC. The best consistency between the fluorescence response and yield loss was found in the case of Bromotril . Based on relationships between fluorescence reaction and yield components, three types of variety reactions and their representatives were suggested.
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