W badaniach polowych przeprowadzonych w latach 1999-2001 określono skuteczność chwastobójczą herbicydu Treflan 480 EC (trifluralina) stosowanego bezpośrednio po zasiewie pszenicy ozimej do zwalczania miotły zbożowej (Apera spica-venti) w mieszaninach z herbicydami zwalczającymi chwasty jedno- i/lub dwuliścienne: Afalon Dyspersyjny 450 SC (linuron), Glean 75 DF (chlorosulfuron) i Stomp 330 EC (pendimetalina). Mieszaniny tych herbicydów porównywano z zalecanym dwukrotnym sposobem stosowania herbicydów – Treflan 480 EC (jesienią po zasiewie pszenicy) + Mustang 306 SE (2,4-D + florasulam) w okresie wiosennym – w celu zwalczenia chwastów dwuliściennych. Najwyższą skuteczność zwalczania miotły zbożowej i chwastów dwuliściennych zapewniła mieszanina herbicydów Treflan 480 EC (1,25 dm³·ha⁻¹) + Glean 75 DF (15 g·ha⁻¹) stosowana jesienią bezpośrednio po zasiewie pszenicy. Łączne stosowanie tych herbicydów w terminie jesiennym zapewniło jednocześnie najwyższy przyrost plonów ziarna i największą opłacalność odchwaszczania pszenicy ozimej.
EN
Three-year field experiment (1999-2001) was conducted to determine the effectiveness of Treflan 480 EC herbicide (trifluraline) for common windgrass (Apera spica-venti) control applied directly after winter wheat sowing in mixtures with herbicides for grass and/or dicotyledonous weed control: Afalon Dyspersyjny 450 EC (linuron), Glean 75 DF (chlorsulfuron) and Stomp 330 EC (pendimethaline). Treflan 480 EC applied directly after winter wheat sowing followed by Mustang 306 SE (2,4-D + florasulam) applied in spring at wheat tillering period constituted the control. The best common windgrass and dicotyledonous weed control, yield increase and net profit were recorded for the mixture of Treflan 480 EC (1,25 dm³·ha⁻¹) with Glean 75 DF (15 g·ha⁻¹) applied in autumn, directly after winter wheat sowing.
The aim of this experiment was to study the effect of soil contamination by treflan 480 EC on biochemical properties of soil and on the growth and development of crops (spring rape and white mustard). The tests were conducted on leached brown soil formed from clay slightly dusty sand of 5.8 pH in 1 M KCl, to which the following quantities of treflan 480 EC wereadded: 0, 1.5, 3.0,4.5, 6.0, 9.0 and 12.0 mm3 · kg -1 of soil. The biochemical analyses were performed 7 days after the experiment was established and during the flowering of plants. It was found that treflan 480 EC had a negative influence on the activity of dehydrogenases, urease, acid phosphatase and alkaline phosphatase. Spring rape and white mustard were intolerant to high concentrations of treflan. The yield of crops was negatively correlated with the herbicide rate. Potential biochemical index of soil fertility derived from the activity of dehydrogenases, urease, acid and alkaline phosphatases as well as the content of organic carbon were negatively correlated with the concentration of treflan in soil, but positively correlated with the yield of spring rape and white mustard.