Biodegradation of chlorpyrifos by either single or combined cultures of some soilborne plant pathogenic fungi
作者:
A. A. Al‐Mihanna,
A.K. Salama,
M.Y. Abdalla,
期刊:
Journal of Environmental Science and Health, Part B
(Taylor Available online 1998)
卷期:
Volume 33,
issue 6
页码: 693-704
ISSN:0360-1234
年代: 1998
DOI:10.1080/03601239809373173
出版商: Taylor & Francis Group
关键词: Biodegradation;chlorpyrifos;liquid media;pathogenic fungi
数据来源: Taylor
摘要:
Biodegradation of chlorpyrifos was studied in liquid culture media amended with either single or combined eight different plant pathogenic fungi isolated from the continuous cropping wheat fields. The average recovery of chlorpyrifos from the liquid media was found to be 86.1%. The detection limit of chlorpyrifos by the analytical method used was 19 ppb. Data showed that the growth of mixed fungi at concentrations up to 200 ppm of chlorpyrifos was higher than in the control treatment. Chlorpyrifos concentrations declined in the medium of combined fungi more than it did in the medium of any single fungus with increase in the incubation period. The amount of chlorpyrifos recovered was 79.8 ppm (39.9%) in the combined fungal cultures after 21 days. However, those recovered from the media ofFusarium graminearum, F. oxysporum, Rhizoctonia solani, Cladosporhim cladosporiodes, Cephalosporium sp., Trichoderma viridi, Alternaria alternata, and Cladorrhinum brunnescens,ranged from 48.0 to 74.8%. The half‐life value (T1/2) for chlorpynfos was 15.8 day in the medium amended with mixed fungi. However, for the single cultures it ranged from 19.3 to 33.0 day.
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