Degradation of isoproturon and bentazone in peat- and compost-based biomixtures

作者：Coppola Laura^*; del Pilar Castillo Maria; Vischetti Costantino

来源：Pest Management Science, 2011, 67(1): 107-113.

DOI：10.1002/ps.2040

• biodegradation
• mineralisation
• compost
• biobed
• isoproturon
• bentazone

BACKGROUND: The composition and properties of a biomixture used in a biobed are decisive for pesticide sorption and degradation. This study was performed to investigate the capability of compost-based substrates in mixtures with citrus peel and vine branch straw and peat-based substrates in mixtures with soil and vine branch straw at different levels in order to degrade isoproturon and bentazone.
RESULTS: Dissipation and mineralisation rates of both pesticides were determined, and metabolic activity was followed as respiration. Compost-based substrates showed faster pesticide dissipation in the presence of lignocellulosic materials, as in garden compost and vine branch straw. The increasing content of vine branch straw in peat-based substrates does not seem to affect dissipation of the parent compounds. Low mineralisation rate was observed in all treatments.
CONCLUSION: Higher pesticide degradation was observed in the lignocellulosic substrates, probably because of the development of lignin-degrading microorganisms which have shown to be robust and are able to degrade recalcitrant pesticides.

• 出版日期2011-1