POSSIBILITIES OF WEED CONTROL IN SOYBEAN (GLYCINE MAX (L.)) WITH HERBICIDES AVAILABLE ON SLOVENIAN MARKET

V poljskem poskusu smo preizkušali delovanje herbicidov za zatiranje plevelov v posevku navadne soje (Glycine max (L.) Merr.). V poskusu je bilo uporabljenih devet različnih herbicidov v različnih kombinacijah. Uporabljeni so bili: Stomp 330 EC (pendimetalin), Dual Gold 960 EC (S-metolaklor), Sencor WG 70 (metribuzin), Afalon (linuron), Harmony 75 WG (tifensulfuron-metil), Focus ultra (cikloksidim), Basagran 600 (bentazon), Plateen WG 41,5 (metribuzin + flufenacet) in Fusilade forte (fluazifop-p-butil). Pokrovnost plevelov v kontroli (neškropljeno) je znašala 94,5 %. V najvišjem deležu (90 %) je bil na neškropljenih poskusnih parcelicah zastopan plevel navadna kostreba (Echinochloa crus-galli). Ostali pleveli so bili zastopani v 1–4 % deležu. Najvišjo učinkovitost smo dosegli pri uporabi kombinacije herbicidov Basagran 600 + Dual Gold 960 EC (96,5 %). Visoko učinkovitost smo dosegli tudi pri uporabi kombinacij Plateen WG 41,5 + Basagran 600 (93,9 %) in Sencor + Dual Gold 960 EC (93,0 %). Na nobeni od poskusnih parcelic ni bilo mogoče opaziti pojavov fitotoksičnega delovanja herbicidov na rastline soje.Field trial was carried out to test the efficiency of herbicides to control weeds in the soya bean (Glycine max (L.) Merr.) stand. Nine different herbicides were applied in various combinations. The fallowing herbicides were tested: Stomp 330 EC (pendimethalin), Dual Gold 960 EC (S-metolachlor), Sencor WG 70 (metribuzin), Afalon (linuron), Harmony 75 WG (thifensulfuron-methyl), Ultra Focus (cikloksidim) Basagran 600 (bentazone) Plateen WG 41.5 (metribuzin + flufenacet) and Fusilade forte (fluazifop-p-butyl). Coverage rate of weeds in control plots (non treatment) was 94.5%. Most dominant weed species of trial plots was barnyardgrass (Echinochloa crus-galli) which occupied 90.0% of area covered by weeds. The coverage rate of other weeds ranged from 1 to 4%. The highest herbicide efficiency was obtained by application of Basagran 600 + Dual Gold 960 EC (96.5%). High efficiency was determined also in case of application of combination of Plateen WG 41.5 + Basagran 600 (93.9%) and Sencor + Dual Gold 960 EC (93.0%). Herbicide phytotoxicity to soya has not been observed at any of trial plots