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

• Published in: Pest management science Vol. 67; no. 1; pp. 107 - 113
• Main Authors: Coppola, Laura, Pilar Castillo, Maria del, Vischetti, Costantino
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.01.2011; Wiley; Wiley Subscription Services, Inc
• Subjects: bentazone; Benzothiadiazines - chemistry; biobed; biodegradation; Biodegradation, Environmental; Biological and medical sciences; Citrus; compost; Degradation; Environmental Restoration and Remediation; Fundamental and applied biological sciences. Psychology; Herbicides - chemistry; isoproturon; Metabolism; Microorganisms; mineralisation; Mineralization; Minerals; Mosses; Parasitic plants. Weeds; Pest control; Pesticides; Phenylurea Compounds - chemistry; Phytopathology. Animal pests. Plant and forest protection; Respiration; Soil; Soil - chemistry; Soil Microbiology; Soil Pollutants - chemistry; Sorption; Substrates; Time Factors; vines; Weeds; Biodegradation; Benzothiadiazine derivatives; Compost; Isoproturon; Pesticides; Peat; Herbicide; biobed; Biosorption; Mineralization; mineralisation; Ureas; bentazone
• ISSN: 1526-498X; 1526-4998; 1526-4998
• DOI: 10.1002/ps.2040

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. Copyright © 2010 Society of Chemical Industry