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Influence of biotic-abiotic factors on the degradation of novaluron in tropical soil
Article 16: Volume 5, Number 3, Summer 2008, Pages 425-429 (5) XML PDF (66 K)
Authors
P. Das; R. Pal; A. Chowdhury
Abstract
In this study, the degradation of novaluron (benzoylphenyl urea insect growth regulator) was investigated under controlled laboratory conditions in clay loam alluvial and coastal saline soils of West Bengal, India. The application rates were field rate (FR); 2FR and 10FR. The incubation study was carried out at 30 °C and 60% of maximum water holding capacity of both the soils. Degradation of novaluron in both the soils followed first order reaction kinetics at all application rates under non-sterile and sterile conditions. The half-lives of novaluron in non-sterilized soils ranged from 17.0-17.8 days (alluvial soil) and 11.4-12.7 days (coastal saline soil), while the values in case of the sterilized soils were 53.7-59.0 days (alluvial soil) and 28.9-29.8 days (coastal saline soil) respectively. The novaluron degradation patterns were found to be highly influenced by soil types, application rates, and biotic abiotic factors. Abiotic factors strongly influenced novaluron degradation in both the soils. Biotic degradation was higher in alluvial soil compared to the coastal saline soil.
Keywords
Benzoylphenyl urea; Pest controlling agent; Pesticide; Sterile soil
Main Subjects
Biotic-abiotic factors; Tropical soil; Novaluron degradation in soil
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