Pozostałości linuronu i flurochloridonu w selerze korzeniowym i w glebie, w zależności od sposobu wykorzystania roślin okrywowych

Experiments were carried out in 2007–2008, to determine the residues of linuron and flurochloridone in celeriac grown by different cultivation method, using cover crops. Field experiments were performed at the Institute of Vegetable Crops in Skierniewice and analysis of residues at the Institute of Soil Science and Plant Cultivation. Celeriac was grown in cover crops cut and incorporated with the soil, in mulch from cover crops and without cover crops. Linuron at the rate of 0.9 kg/ha and flurochloridone – 0.75 kg/ha, were applied after celeriac planting. The samples of leaves were taken 29, 91 and 125 days after treatment (DAT), root 91 and 125 days and soil samples 18, 29, 88, 91 and 125 DAT. The residues of linuron were determined by liquid chromatography (HPLC) with UV detection and flurochloridone by the method of gas chromatography with EC detector. The residue of linuron and flurochloridone exceeded the acceptable level at 29 DAT, only. Method of cultivation influenced the residue level – the highest level was achieved in cover crops cut and incorporated with the soil.