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Bulletin of the World Health Organization : 1982; Volume 60, Number 2, Year 1982 60 (2), Pages 189-192: Activitcs Scientifiques OMS

By World Health Organization

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Book Id: WPLBN0000236655
Format Type: PDF eBook
File Size: 0.3 MB
Reproduction Date: 2005

Title: Bulletin of the World Health Organization : 1982; Volume 60, Number 2, Year 1982 60 (2), Pages 189-192: Activitcs Scientifiques OMS  
Author: World Health Organization
Volume:
Language: English
Subject: Health., Public health, Wellness programs
Collections: Medical Library Collection, World Health Collection
Historic
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Publisher: World Health Organization

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Organization, W. H. (n.d.). Bulletin of the World Health Organization : 1982; Volume 60, Number 2, Year 1982 60 (2), Pages 189-192. Retrieved from http://worldebooklibrary.com/


Description
Medical Reference Publication

Excerpt
INTRODUCTION In the past the application of molluscicides to natural watercourses, ponds and reservoirs has been carried out without much regard to the various ecological balances existing between the plankton and benthon which occur in biologically stable water systems. Cautionary remarks pertaining to the use of insecticides such as DDT in the control of aquatic insects have been made by Hynes (1960). Other workers (Barnley & Prentice, 1958) noted that the destruction of filter-feeding arthropods by DDT used in Simulium control in Uganda resulted in an increase of algal growth on rocks. With regard to snail ecology, Abdel Malek (1958) reports on the factors which condition the habitat of planorbid snails and makes mention of the periphyton, phytoplankton and other organisms which occur in the irrigation canals of the Gezira, Sudan. De Meillon et al. (1958) describe the ephemeropteran fauna associated with different speeds of water current and their relations with various snail species in flowing streams.

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