Available nitrogen and arginine deaminase activity in groundnut (Arachis hypogaea L.) fields after imidacloprid, diazinon, and lindane treatments.
Plant available nitrogen and arginine deaminase activities were determined in insecticide-treated groundnut (Arachis hypogaea L.) fields between July and November for three consecutive years (1997-1999). Diazinon was applied for both seed and soil treatments. However, imidacloprid and lindane were used only for the seed treatments. An average half-life (t(1/2)) of diazinon in seed- and soil-treated fields was 29.32 and 34.87 days, respectively. Its residues were detected till 60 days in both seed- and soil-treated fields. Diazinon treatments had shown stimulatory effects on available nitrogen in both types of treatments. However, the increase in arginine deaminase activity was only observed in diazinon soil-treated field. Residues of imidacloprid and lindane were detected in seed-treated fields till 90 and 120 days with an average half-life (t(1/2)) of 40.96 and 53.39 days, respectively. Imidacloprid had stimulatory effects, and lindane had adverse effects on both available nitrogen and arginine deaminase activities.
Singh
Jitendra
J
Department of Zoology, University of Delhi, Delhi-110007, India.
Singh
Dileep K
DK
D010367:Arachis / Q000254:growth & development*; D001120:Arginine / Q000737:chemistry; D003976:Diazinon / Q000008:administration & dosage / Q000032:analysis; D001556:Hexachlorocyclohexane / Q000008:administration & dosage / Q000032:analysis; D007093:Imidazoles / Q000008:administration & dosage / Q000032:analysis; D007306:Insecticides / Q000008:administration & dosage*; D000073943:Neonicotinoids; D009574:Nitro Compounds; D009584:Nitrogen / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis; D012639:Seeds / Q000254:growth & development; D012987:Soil / Q000032:analysis*
D007093:Imidazoles; D007306:Insecticides; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010573:Pesticide Residues; D012987:Soil; C082359:imidacloprid; D001556:Hexachlorocyclohexane; D001120:Arginine; D009584:Nitrogen; D003976:Diazinon