Use of geographic information systems for assessing ground water pollution potential by pesticides in central Thailand

Use of geographic information systems for assessing ground water pollution potential by pesticides in central Thailand

Date: August 2002
Creator: Thapinta, Anat
Description: This study employed geographic information systems (GIS) technology to evaluate the vulnerability of groundwater to pesticide pollution. The study area included three provinces (namely, Kanchana Buri, Ratcha Buri, and Suphan Buri) located in the western part of central Thailand. Factors used for this purpose were soil texture, percent slope, primary land use, well depth, and monthly variance of rainfall. These factors were reclassified to a common scale showing potential to cause groundwater contamination by pesticides. This scale ranged from 5 to 1 which means high to low pollution potential. Also, each factor was assigned a weight indicating its influence on the movement of pesticides to groundwater. Well depth, the most important factor in this study, had the highest weight of 0.60 while each of the remaining factors had an equal weight of 0.10. These factors were superimposed by a method called “arithmetic overlay” to yield a composite vulnerability map of the study area. Maps showing relative vulnerability of groundwater to contamination by pesticides were produced. Each of them represented the degree of susceptibility of groundwater to be polluted by the following pesticides: 2,4-D, atrazine, carbofuran, dicofol, endosulfan, dieldrin & aldrin, endrin, heptachlor & heptachlor epoxide, total BHC, and total DDT. ...
Contributing Partner: UNT Libraries
ReSource, Volume 8, Number 1, Fall 1991

ReSource, Volume 8, Number 1, Fall 1991

Date: 1991
Creator: University of North Texas
Description: ReSource magazine includes articles and notes about research at University of North Texas in various academic fields.
Contributing Partner: University Relations, Communications & Marketing department for UNT
Pesticides: Improvements Needed to Ensure the Safety of Farmworkers and Their Children

Pesticides: Improvements Needed to Ensure the Safety of Farmworkers and Their Children

Date: March 14, 2000
Creator: United States. General Accounting Office.
Description: A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on issues related to the safety of children who may be exposed to pesticides in agricultural settings, focusing on: (1) what federal requirements govern the safe use of pesticides, particularly as they relate to protecting children in agricultural settings; (2) what information is available on the acute and chronic effects of agricultural pesticide exposure, particularly on children; and (3) what the Environmental Protection Agency (EPA) has done to ensure that its Worker Protection Standard considers the needs of children and is being adequately implemented and enforced."
Contributing Partner: UNT Libraries Government Documents Department
Pesticides: EPA Should Take Steps to Improve Its Oversight of Conditional Registrations

Pesticides: EPA Should Take Steps to Improve Its Oversight of Conditional Registrations

Date: August 8, 2013
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "The total number of conditional registrations granted is unclear, as the Environmental Protection Agency (EPA) reports that its data are inaccurate for several reasons. First, the database used to track conditional registrations does not allow officials to change a pesticide's registration status from conditional to unconditional once the registrant has satisfied all requirements, thereby overstating the number of conditional registrations. Second, EPA staff have misused the term "conditional registration," incorrectly classifying pesticide registrations as conditional when, for example, they require a label change, which is not a basis in statute for a conditional registration. According to EPA documents and officials, weaknesses in guidance and training, management oversight, and data management contributed to these misclassification problems. For example, according to EPA documents, there was limited, organized management oversight to ensure that regulatory actions were not misclassified as conditional registrations. As of July 2013, EPA officials told GAO that the agency has taken or is planning to take several actions to more accurately account for conditional registrations, including beginning to design a new automated data system to more accurately track conditional registrations."
Contributing Partner: UNT Libraries Government Documents Department
Profile of the youth self-report among south Texas adolescents and the potential relationship to pesticide exposure

Profile of the youth self-report among south Texas adolescents and the potential relationship to pesticide exposure

Date: August 1999
Creator: Hagar, Kristy S.
Description: The potential for human exposure to pesticides exists particularly for agricultural workers (i.e. migrant workers) and individuals within close proximity to pesticide-sprayed crops (i.e. those living on or near agricultural farms). Children, through biology and behavior, may be more susceptible and vulnerable to exposure to pesticides than adults. The purpose of this study was to examine young populations particularly at-risk for occupational or accidental exposure to pesticides and determine associated behavioral, emotional, and physical symptoms. A total of 444 students from two South Texas school districts completed questionnaires assessing level of risk of exposure to pesticides and were categorized into at-risk and low risk categories. Physical, emotional, and behavioral symptoms were obtained using the Youth Self-Report. Children who were at-risk demonstrated significantly higher scores on the Youth Self-Report (YSR) in the areas of anxious/depressed, attention problems, social problems, somatic complaints, thought problems, withdrawal, internalizing behaviors, and total problem behaviors than children who were at lower risk of pesticide exposure. Odds ratios were obtained and suggested that children in the at-risk category were more five times more likely to score in the clinically significant range on the Attention Problems subscale, and three times more likely to score in the clinically significant ...
Contributing Partner: UNT Libraries
Diseases and insects of garden vegetables.

Diseases and insects of garden vegetables.

Date: 1940
Creator: Gilbert, William W. (William Williams), b. 1880.; Popenoe, C. H. (Charles Holcomb), 1884-1933. & Caffrey, D. J.
Description: Describes a wide variety of insect pests and diseases of vegetables, their characteristics, and the steps farmers can take to prevent, control, and treat these threats.
Contributing Partner: UNT Libraries Government Documents Department
Lubricating-oil sprays for use on dormant fruit trees.

Lubricating-oil sprays for use on dormant fruit trees.

Date: April 1933
Creator: Quaintance, A. L. (Altus Lacy), 1870-1958.; Newcomer, E. J. (Erval Jackson), 1890- & Porter, B. A. (Bennet Allen), 1892-
Description: Provides instructions for the preparation, storage, and use of lubricating-oil emulsions for orchard spraying.
Contributing Partner: UNT Libraries Government Documents Department
The chinch bug and how to fight it.

The chinch bug and how to fight it.

Date: June 1926
Creator: Flint, W. P. (Wesley Pillsbury), 1882-1943. & Larrimer, W. H. (Walter Harrison), 1889-
Description: Describes the damages caused by the chinch bug to grain and grass crops, and several methods for its control.
Contributing Partner: UNT Libraries Government Documents Department
Tobacco hornworm insecticide : recommendations for use of powdered arsenate of lead in dark-tobacco district.

Tobacco hornworm insecticide : recommendations for use of powdered arsenate of lead in dark-tobacco district.

Date: June 1923
Creator: Morgan, A. C.
Description: Describes methods for the use of arsenate of lead to control the tobacco hornworm and prevent damage to crops.
Contributing Partner: UNT Libraries Government Documents Department
The principal insect enemies of growing wheat.

The principal insect enemies of growing wheat.

Date: 1901
Creator: United States. Dept. of Agriculture.
Description: Describes several insect pests affecting wheat crops, and how to control them.
Contributing Partner: UNT Libraries Government Documents Department
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