Theses and Dissertations - UTB/UTPA

Date of Award


Document Type


Degree Name

Master of Science (MS)



First Advisor

Dr. Norman Savage

Second Advisor

Dr. Jacobo Ortega

Third Advisor

Dr. Sammie Sides


An investigation was conducted to determine if the widespread and abundant use of organochlorine pesticides in the Lower Rio Grande Valley of Texas has had any effect on the microbial flora in the water and in the bottom sediments of the Lower Rio Grande River of Texas.

Rio Grande River water and bottom sediments were cultured for microbial flora, were analyzed for pesticide residues, and the physicochemical properties of the water were determined. Samples were taken at four different sites during a ten month sampling period in 1974.

Traces of organochlorine residues were found in the water, and higher concentrations in the bottom sediment. However, there was no correlation discerned between any of these parameters.


Copyright 1978 Juan H. Gonzalez. All Rights Reserved.

Granting Institution

Pan American University