Document Detail


Key parameters and practices controlling pesticide degradation efficiency of biobed substrates.
MedLine Citation:
PMID:  22494383     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We studied the contribution of each of the components of a compost-based biomixture (BX), commonly used in Europe, on pesticide degradation. The impact of other key parameters including pesticide dose, temperature and repeated applications on the degradation of eight pesticides, applied as a mixture, in a BX and a peat-based biomixture (OBX) was compared and contrasted to their degradation in soil. Incubation studies showed that straw was essential in maintaining a high pesticide degradation capacity of the biomixture, whereas compost, when mixed with soil, retarded pesticide degradation. The highest rates of degradation were shown in the biomixture composed of soil/compost/straw suggesting that all three components are essential for maximum biobed performance. Increasing doses prolonged the persistence of most pesticides with biomixtures showing a higher tolerance to high pesticide dose levels compared to soil. Increasing the incubation temperature from 15°C to 25°C resulted in lower t(1/2) values, with biomixtures performing better than soil at the lower temperature. Repeated applications led to a decrease in the degradation rates of most pesticides in all the substrates, with the exception of iprodione and metalaxyl. Overall, our results stress the ability of biomixtures to perform better than soil under unfavorable conditions and extreme pesticide dose levels.
Authors:
Evangelos Karanasios; Dimitrios G Karpouzas; Nikolaos G Tsiropoulos
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes     Volume:  47     ISSN:  1532-4109     ISO Abbreviation:  J Environ Sci Health B     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-04-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7607167     Medline TA:  J Environ Sci Health B     Country:  England    
Other Details:
Languages:  eng     Pagination:  589-98     Citation Subset:  IM    
Affiliation:
a Department of Agriculture, Crop Production and Rural Environment , University of Thessaly , Volos , Greece.
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