Journal article
Inhibition of soil urease by organophosphorus insecticides
Soil Biology and Biochemistry, Vol.8(2), pp.99-102
1976
Abstract
The effect of three organophosphorus insecticides on soil urease was examined. Inhibition of urea hydrolysis, some 60 days after application of 1000 parts/106 of insecticide to a sandy clay loam, approached 40% (accothion) and exceeded 50% in the case of malathion and thimet. Similar inhibitory effects were recorded using a silt loam soil with which 200 parts/106 application also produced inhibition ranging from 14% (accothion) to 23% (thimet) after 10 days. With lower concentrations of insecticide (50 parts/106) inhibition, though again significant, was of a more ephemeral nature. All three insecticides, at a concentration of 1000 parts/10+6, prevented almost any hydrolysis of urea by jack bean urease. Ureolytic microorganisms, isolated from the soils under investigation, were inhibited by the organophosphates to a greater or lesser extent but the development of tolerance was common. It is suggested that the application of insecticides to control soil-borne insect pests may be a factor in determining the efficiency of urea fertilizer mineralization. © 1976.
Details
- Title
- Inhibition of soil urease by organophosphorus insecticides
- Authors
- G Lethbridge (Author) - University of Kent, United KingdomRichard G Burns (Author) - University of Kent, United Kingdom
- Publication details
- Soil Biology and Biochemistry, Vol.8(2), pp.99-102
- Publisher
- Pergamon
- Date published
- 1976
- DOI
- 10.1016/0038-0717(76)90072-9
- ISSN
- 0038-0717
- Organisation Unit
- University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
- Language
- English
- Record Identifier
- 99449927202621
- Output Type
- Journal article
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