Stopień odporności owsa głuchego na inhibitory ACC-azy w Polsce południowo-wschodniej

Polish. W pracy przedstawiono wyniki dwuletnich badañ laboratoryjnych i mikropo- letkowych nad odpornością owsa głuchego na fenoksaprop-P-etyl i diklofop metyl. Rośliny zebrano z wybranych pól Polski południowo-wschodniej, na których rolnicy mieli problemy z chemicznym zwalczaniem chwastu. Za odporne przyjęto te biotypy, które w teście laboratoryjnym przeżywały 6-dniowy wzrost na wodnym roztworze herbicydu w min. 50% i te, które zakwitły po oprysku polową dawką herbicydu w min. 50%. Na podstawie badañ wytypowano 3 miejscowości z biotypami chwastu odpornymi na fenoksaprop-P-etyl (Szarów, Wiązownica, Miechów) i 4 miejscowości z biotypami odpornymi na diklofop metyl (Szarów, Laskowice, Skawa i Spytkowice).

English. In the years 2003-2004 two experiments: laboratory and field, were carried out to detect the level of wild oat herbicide resistance. Weeds were collected from fields in south-eastern Poland, on the basis of survey conducted between farmers who have problems with wild oat herbicidal fighting. Two herbicides were tested: fenoxapropP-ethyl and diclofop methyl, both ACC-ase inhibitors. The laboratory test was established by modified Letouze et al. (1997) method. After 6-day growth on each herbicide water solution, the number of alive wild oat seedlings was assesed. In the field experiment plants in 3-5 leaf stage were sprayed with field dose of each herbicide. Two weeks after spraying the percentage of plants damage and in July the percentage of flowering plants were assesed. The wild oat plants that survive in laboratory test in 50% and plants that flowered in 50% in field conditions were recognized as resistant. On that basis wild oat resistace to fenoxaprop-P-ethyl and to diclofop methyl was stated on 17% and 28% fields from overall number of 18 fields, respectively.

English. Avena fatua, herbicide resistance, fenoxaprop P ethyl, diclofop methyl, south eastern Poland

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