Abstract:

The downward movement of azoxystrobinin clay loam soil was studied under continuous flow conditions in undisturbed soil columns under laboratory conditions. The undisturbed columns containing clay loam soil were leached at two application rates, 50μg and 100μg, with water equivalent to 300 mm rainfall. Residues of azoxystrobin in soil and leachate were estimated by gas–liquid chromatography and confirmed by gas chromatography–mass spectrometry. Results revealed that although majority of the azoxystrobin remained in top 0–5 cm layer, substantial amount moved to 5–10 and 10-15cm depth under continuous flow conditions at both doses. Results indicated that the retention of azoxystrobin residues was more under continuous flow conditions at higher dose, whereas low retention of azoxystrobin residues at low dose. Low mobility of azoxystrobin in soil indicated that it may be safe for ground water. Leachate fractions were free from azoxystrobin residues.

Keywords: Mobility; Leachate; Azoxystrobin ; clay loam soil ; Column; Residues

Beena Kumari & Priyanka Dagar

Download PDF