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Subject: Chemistry × Author: Chauhan, Reena × End date: 2008 × Start date: 2005 ×
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    ThesisItemOpen Access
    Persistence and degradation behaviour of propiconazole in soil and water systems
    (CCSHAU, 2006) Chauhan, Reena; Beena Kumari
    Laboratory studies were carried out in clay loam soil and canal water treated with propiconazole, a triazole fungicide, to investigate the persistence and degradation behavior of propiconazole residues. During these studies, propiconazole 25 EC was applied @ 125 and 250 g a.i./ha in clay loam soil taken in the plastic pots under non-flooded and flooded conditions. Water was treated with propiconazole@ 0.0625 and 0.125μgml-1. Each treatment of soil and water was replicated thrice. The representative samples of soil and water were taken after 0 (1h), 3, 7, 15, 30, 60 and 90 days after treatments and processed for propiconazole residue analysis. The residues were estimated by GLC technique employing ECD equipped with SPB-5 (95%dimethyl /5%diphenyl polysiloxane) capillary column. Retention time of propiconazole was observed to 16.618 min and 16.742min.The dissipation was faster in non-flooded soil (half-life period; 51.90 and 53.26 days) as compared to flooded condition (half-life period, 55.85 and 57.69 days).The dissipation in water was faster as compared to soil. Half-life values at single and double doses in water were 35.78 and 38.22 days, respectively. The lower dose showed slightly faster dissipation as compared to higher dose irrespective of the soil and water systems. In soil as well as water, dissipation followed the first order kinetics. Keeping in view the dissipation pattern under laboratory conditions it can be inferred that although complete degradation of propiconazole was neither in soil nor in water yet keeping in view the low residues levels in 90 day studies, it can be applied in crop at field conditions.