General information for wild oat (Avena fatua) 

In the years 2008-2011 samples from 34 fields were collected. The  seeds gathered from the field were farmer got problem with control wild oat. Susceptible biotype was used as standard. Two four replication greenhouse experiments was done.

At first experiment in one dose of 4 herbicides with difference mode of action were chosen:  propoxycarbazone-sodiu (Attribut 70 SG, Bayer Crop Science), metsulfuron + iodosulfuron (Atlantis 04 WG, Bayer Crop Science), pemdimethalin + isoproturon (Maraton 375 SC, Bayer Crop Science), pinoxaden (Axial 100 EC, Syngenta).

At second experiment fenoxaprop-P-ethyl and pinoxaden each in 7 deference dose were used, (low and high dose). For each treatment four pot were used as four replication. And 4 weeks after treatment, the plants were cut at the soil surface and their fresh weight was determined. Statistical analysis of date from greenhouse experiments was performed.

In two  sites one year field trials  with  pinoxaden  used with 2 dose were determinate .   

Mechanism of Resistance. Mechanism of resistance two  biotypes are target site resistant to ALS inhibitor.

Mechanism of resistance for ACCase inhibitors is unknown.

Genetic. The genetic basis of resistance for this biotypes  is unknown.

Relative Fitness. There is no done.  

III. The obtained results were publishing:

Adamczewski K., R. Kierzek. 2011, K. Matysiak. Wild oat (Avena fatua L.) biotypes resistant to acetolactate synthase and aceto-CoA carboxylase inhibitors in Poland. Plant Soil Environ.  Vol. 59, 2013, No. 9: 432–437.

ACTA AGROBOTANICA Vol. 59 z. 2  2006 s. 263 274

Stopieñ odpornoœci owsa g³uchego na inhibitory ACC-azy w Polsce po³udniowo-wschodniej AGNIESZKA STOK£OSA, JACEK KIEÆ Katedra Ogólnej Uprawy Roli i Roœlin AR w Krakowie, 31 120 Kraków, Al. Mickiewicza 21 Department of Soil Management and Plant Cultivation Agricultural University of Krakow, PL 31 120 Krakow Al. Mickiewicza 21 (Otrzymano: 2.03.2005)

The level of wild oat resistance to ACC-ase inhibitors in South-Eastern Poland

S u m m a r y

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. Key words: Avena fatua, herbicide resistance, fenoxaprop P ethyl, diclofop methyl, south eastern Poland.

DOI: 10.37317/biul-2006-0011 NR 242              BIULETYN INSTYTUTU HODOWLI I AKLIMATYZACJI ROŚLIN             2006   AGNIESZKA

STOKŁOSA JACEK KIEĆ Katedra Ogólnej Uprawy Roli i Roślin Akademia Rolnicza w Krakowie Badania nad odpornością odmian botanicznych owsa głuchego (Avena fatua L.) na herbicydy z grupy inhibitorów ACC-azy

Studies on resistance of wild oat (Avena fatua L.) varieties to herbicides from the group of ACC-ase inhibitors

Summary: 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.