Responses of Soil Enzymes to Insecticides in Groundnut (Arachis hypogaea L.) Cultivated Black Soil

Nasreen, C. and Jaffer Mohiddin, G. and Srinivasulu, M. and Padmini, A.R. and Ramanamma, P. and Rangaswamy, V. (2012) Responses of Soil Enzymes to Insecticides in Groundnut (Arachis hypogaea L.) Cultivated Black Soil. World Journal of Agricultural Sciences, 8 (2). pp. 163-168.

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Abstract

We investigated the impact of two insecticides, endosulfan and profenofos on enzyme activities, such as cellulase and amylase in black soil, collected from groundnut (Arachis hypogaea. L) cultivated fields of Kurnool district of Andhra Pradesh, India, by conducting experiments in laboratory at different concentrations (10, 25, 50, 75, 100ppm) which are equivalent to field application rates (1.0, 2.5, 5.0, 7.5, 10.0 kg haG1). In our study we observed, cellulase and amylase activities were significantly enhanced at 2.5 and 5.0 kg haG1 in black soil after 10 days of incubation. Furthermore increase in concentration of insectcides decreased the rate of enzyme activity. However the stimulatory effect was continued up to 20 days of incubation in black soil. Whereas, the decline phase was started after 20 days and the minimum enzyme activities were noticed at the end of 40 days of incubation. But higher concentrations of insecticides at the level of 7.5 to 10.0 kg haG1 were either toxic or innocuous to cellulase and amylase activities in black soil

Item Type: Article
Uncontrolled Keywords: Endosulfan, Profenofos, Soil enzymes, Groundnut (Arachis hypogeae L.) soil
Author Affiliation: Department of Microbiology, Sri Krishnadevaraya University, Anantapur-515055, Andhra Pradesh, India
Subjects: Plant Protection
Soil Science and Microbiology
Divisions: Groundnut
Depositing User: Mr. SanatKumar Behera
Date Deposited: 16 Jul 2012 10:54
Last Modified: 16 Jul 2012 10:55
Official URL: http://www.idosi.org/wjas/wjas8(2).htm
URI: http://eprints.icrisat.ac.in/id/eprint/6802

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