UPTAKE AND METABOLISM OF IMIDACLOPRID IN SUGARCANE AND ITS PERSISTENCE IN SOIL
Loading...
Date
2012
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
PAU Ludhiana
Abstract
The uptake and metabolism of imidacloprid in sugarcane leaves and soil were
studied following application of imidacloprid @ 20 and 80 g a.i. ha-1. Samples of
sugarcane leaves and soil were collected at various time intervals and analyzed by using
High Performance Liquid Chromatograph (HPLC) and confirmed by Liquid
Chromatograph –Mass Spectrometry (LCMS). Total residues of imidacloprid and its
metabolites were found to be 4.97 and 12.99 mg kg-1 in leaves collected 7 days after the
application of imidacloprid @ 20 and 80 g a.i. ha-1 respectively. These residues declined
to below the detectable limit at 90 days after the application at both the dosages. The
samples of sugarcane juice and trash did not reveal the presence of imidacloprid residues
at harvest. In soil samples total residues of imidacloprid were found to be 4.29 and 7.81
mg kg-1 collected 7 days after the application @ 20 and 80 g a.i. ha-1 respectively. These
residues could not be detected at 90 days after the application at both the dosages. In
laboratory experiment, residues of imidacloprid in sandy loam, loamy sand and clay loam
after 7 day of its application @ 100 mg kg-1 were found to be 69.74, 72.66 and 77.20 mg
kg-1, respectively. The persistence of imidacloprid was almost similar in all type of soils.
In sterilized soil, Bacillus alkaninitricus was found to be more efficient than B.
aerophilus and their consortium while, in unsterilized soil, bacterial consortium proved to
be more efficient in imidacloprid degradation.
Description
Keywords
null