Fruiting phenology of some weed species in sowing of chosen cultivar plants

Abstract

In the paper, the percentage shares of the phases of fruiting and diaspore shedding of some weed species during fodder beet, spring wheat and faba bean harvest are presented. The results of the study were gathered in the years 2000-2003 on river alluvial soil made from light loam. The experimental scheme included mechanical and chemical control of the cultivated plants. On weed-free objects treated with herbicides, the following herbicides were used: fodder beet - Buracyl 80 WP (lenacyl 80%) in dose 1 kg.ha<sup>-1</sup>; spring wheat - Chwastox Turbo 340 SL (MCPA + dicamba) in dose 2l.ha<sup>-1</sup>; faba-bean - Afalon (linuron 50%) in dose 1,5 kg.ha<sup>-1</sup>. Phenological observations were carried out at 10-day intervals beginning from the day of sowing the cultivated plant. It was proven that weeds had the most favourable conditions of fruiting and seed shedding in fodder beet and faba bean. Fruiting and shedding of most weed species were limited by herbicides, as well as cold years. The following weed species: fodder beet without herbicides - <i>Lamium amplexicaule</i>, <i>Chenopodium polyspermum</i>, <i>Anagallis arvensis</i> i <i>Echinochloa crus</i>-<i>galli</i>; fodder beet with herbicides - <i>Convolvulus arvensis</i>, <i>Lamium purpureum</i> i <i>Echinochloa crus</i>-<i>galli</i>; spring wheat without herbicides - <i>Capsella bursa</i>-<i>pastoris</i> i <i>Fallopia convolvulus</i>; spring wheat with herbicides - <i>Avena fatua</i>; faba been without herbicides - <i>Galium aparine</i>, <i>Anagallis arvensis</i> i <i>Convolvulus arvensis</i>; faba been with herbicides - <i>Galium aparine</i>, shed diaspores in the greatest degree.