Residues of Organic Insecticides in Soils.

Hexachlorocyclohexane, DDT, parathion and toxaphene, each mixed at several concentrations with sandy loam, clay loam and muck, were leached with water and aged in a greenhouse. Bioassays, using Drosophila adults or mosquito larvae, showed that rate of decomposition was most rapid with parathion, fol...

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Main Author: Proverbs, Maurice Desmond
Other Authors: Morrison, Frank O. (Supervisor)
Format: Others
Language:en
Published: McGill University 1952
Subjects:
Online Access:http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=108626
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spelling ndltd-LACETR-oai-collectionscanada.gc.ca-QMM.1086262014-02-13T03:56:27ZResidues of Organic Insecticides in Soils.Proverbs, Maurice DesmondBiology.Hexachlorocyclohexane, DDT, parathion and toxaphene, each mixed at several concentrations with sandy loam, clay loam and muck, were leached with water and aged in a greenhouse. Bioassays, using Drosophila adults or mosquito larvae, showed that rate of decomposition was most rapid with parathion, followed in turn by hexachlorocyclohexane, wettable DDT, toxaphene, p-p' DDT. Rate of decomposition varied with the soil, generally being quicker at low than at high dosages, and more rapid at the top of the soil column than at the bottom with toxaphene and hexachlorocyolohexane while the reverse was true with DDT. Bioassays showed small quantities of insecticide in the leachates. Aging reduced phytotoxicity of hexachlorocyclohexane, but increased that of DDT.McGill UniversityMorrison, Frank O. (Supervisor)1952.Electronic Thesis or Dissertationapplication/pdfenalephsysno: NNNNNNNNNTheses scanned by McGill Library.All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated.Doctor of Philosophy. (Department of Biology.) http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=108626
collection NDLTD
language en
format Others
sources NDLTD
topic Biology.

spellingShingle Biology.

Proverbs, Maurice Desmond
Residues of Organic Insecticides in Soils.
description Hexachlorocyclohexane, DDT, parathion and toxaphene, each mixed at several concentrations with sandy loam, clay loam and muck, were leached with water and aged in a greenhouse. Bioassays, using Drosophila adults or mosquito larvae, showed that rate of decomposition was most rapid with parathion, followed in turn by hexachlorocyclohexane, wettable DDT, toxaphene, p-p' DDT. Rate of decomposition varied with the soil, generally being quicker at low than at high dosages, and more rapid at the top of the soil column than at the bottom with toxaphene and hexachlorocyolohexane while the reverse was true with DDT. Bioassays showed small quantities of insecticide in the leachates. Aging reduced phytotoxicity of hexachlorocyclohexane, but increased that of DDT.
author2 Morrison, Frank O. (Supervisor)
author_facet Morrison, Frank O. (Supervisor)
Proverbs, Maurice Desmond
author Proverbs, Maurice Desmond
author_sort Proverbs, Maurice Desmond
title Residues of Organic Insecticides in Soils.
title_short Residues of Organic Insecticides in Soils.
title_full Residues of Organic Insecticides in Soils.
title_fullStr Residues of Organic Insecticides in Soils.
title_full_unstemmed Residues of Organic Insecticides in Soils.
title_sort residues of organic insecticides in soils.
publisher McGill University
publishDate 1952
url http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=108626
work_keys_str_mv AT proverbsmauricedesmond residuesoforganicinsecticidesinsoils
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