Environmental Geochemistry and Health

, Volume 34, Issue 3, pp 365–374

Effect of insecticides alone and in combination with fungicides on nitrification and phosphatase activity in two groundnut (Arachis hypogeae L.) soils

  • M. Srinivasulu
  • G. Jaffer Mohiddin
  • K. Subramanyam
  • V. Rangaswamy
Original Paper

DOI: 10.1007/s10653-011-9399-x

Cite this article as:
Srinivasulu, M., Mohiddin, G.J., Subramanyam, K. et al. Environ Geochem Health (2012) 34: 365. doi:10.1007/s10653-011-9399-x

Abstract

The effect of selected pesticides, monocrotophos, chlorpyrifos alone and in combination with mancozeb and carbendazim, respectively, was tested on nitrification and phosphatase activity in two groundnut (Arachis hypogeae L.) soils. The oxidation of ammonical nitrogen was significantly enhanced under the impact of selected pesticides alone and in combinations at 2.5 kg ha−1 in black soil, and furthermore, increase in concentration of pesticides decreased the rate of nitrification, whereas in the case of red soil, the nitrification was increased up to 5.0 kg ha−1 after 4 weeks, and then decline phase was started gradually from 6 to 8 weeks of incubation. The activity of phosphatase was increased in soils, which received the monocrotophos alone and in combination with mancozeb up to 2.5 and 5.0 kg ha−1, whereas the application of chlorpyrifos singly and in combination with carbendazim at 2.5 kg ha−1 profoundly increased the phosphatase activity after 20 days of incubation, in both soils. But higher concentrations of pesticides were either innocuous or inhibitory to the phosphatase activity.

Keywords

Pesticides Combinations Nitrification Phosphatase activity Groundnut (Arachis hypogeae L.) soils 

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • M. Srinivasulu
    • 1
  • G. Jaffer Mohiddin
    • 1
  • K. Subramanyam
    • 2
  • V. Rangaswamy
    • 1
  1. 1.Department of MicrobiologySri Krishnadevaraya UniversityAnantapurIndia
  2. 2.Plant Molecular Biology Laboratory, Department of BiotechnologyBharathidasan UniversityTiruchirappalliIndia

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