Studies on resistance of wild oat (Avena fatua L.) varieties to herbicides from the group of ACC-ase inhibitors
Agnieszka Stokłosa
kszur@urk.edu.plKatedra Ogólnej Uprawy Roli i Roślin, Akademia Rolnicza w Krakowie (Poland)
Jacek Kieć
Katedra Ogólnej Uprawy Roli i Roślin, Akademia Rolnicza w Krakowie (Poland)
Abstract
Resistance of wild oat (Avena fatua L.) botanical varieties to fenoxaprop-P-ethyl and diclofop methyl was investigated. Plants were collected from arable fields in south-eastern Poland, where the effectiveness of herbicides used to control wild oat had decreased. In the laboratory experiment germinated seeds were grown for 6 days on herbicide water solution. Afterwards, a number of alive seedlings and the length of their coleoptyli were determined. The response of wild oat varieties to field spraying with fenoxaprop-P-ethyl (55.2g a.i. ha-1) or diclofop methyl (720 g a.i. ha-1) was investigated in field trials in the years 2003–2004. A rate of leaves injury, number of flowering plants, and mass of seeds were assessed. Resistance to the herbicides applied was found in some varieties of wild oat. The level of resistance was different, depending on the experimental conditions. In the field conditions, the expression of resistance was modified by meteorological conditions.
Keywords:
Avena fatua L., herbicides, varieties, resistanceReferences
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Authors
Agnieszka Stokłosakszur@urk.edu.pl
Katedra Ogólnej Uprawy Roli i Roślin, Akademia Rolnicza w Krakowie Poland
Authors
Jacek KiećKatedra Ogólnej Uprawy Roli i Roślin, Akademia Rolnicza w Krakowie Poland
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