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

Laura Coppola, Costantino Vischetti, Mdp Castillo

Risultato della ricerca: Contributo in rivistaArticolo in rivista

Abstract

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.
Lingua originaleEnglish
pagine (da-a)107-113
Numero di pagine7
RivistaPest Management Science
Stato di pubblicazionePubblicato - 2011

Keywords

  • bentazon
  • biodegradation
  • isoproturon
  • mineralization

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