Thesis (Ph. D.)--Georgia State University, 2007. / Title from file title page. Charles Gallagher, committee chair; Lesley Reid, Ian C. Fletcher, Robert Adelman, committee members. Electronic text (245 p.) : digital, PDF file. Description based on contents viewed June 6, 2008. Includes bibliographical references (p. 220-245).

Thesis (M.B.A. (Investec Business School)) - Rhodes University, 2008.

Thesis (Ph. D.)--University of Florida, 1999. / Title from first page of PDF file. Document formatted into pages; contains viii, 265 p. Vita. Includes bibliographical references (p. 246-254).

Thesis (Ph. D.)--Westfälische Wilhelms-Universität zu Münster, 1983. / Vita. Includes bibliographical references (p. [333-335]).

Thesis (Ph. D.)--University of Wisconsin, 1959. / Extension Repository Collection. Typescript (carbon copy). eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 172-174).

Thesis (Masters Diploma (Technology)--Cape Technikon, Cape Town,1994 / Pesticides are generally used in south-Africa for the control of various pests; from insects and fungi to weeds. The agricultural industry is probably the biggest user of pesticides and therefore workers in this part of the labour force have the biggest risk of being exposed to the hazards of these essential products. During the 1988/89 deciduous fruit season the deciduous fruit industry earned approximately R1000 million in foreign exchange. It is therefore very important for this industry to produce fruit of high quality in a very competitive market. Of the total deciduous exports, apples comprised approximately 62,5%. The EIgin-Grabouw area is the biggest producer of apples. This industry is clearly very dependant on pesticides to protect its crops against pests. From time to time farm - workers are exposed to pesticides, a study was therefore performed to access the levels of exposure of farm workers. Blood and urine samples were collected in a comprehensive biological monitoring program in the Elgin area to determine, uusing clinical tests, the level of exposure to pesticides. It was decided later that the determination of pesticide residues in blood would form part of this main study. Other tests included serum and red cell cholinesterase. Samples were collected during August (start of spraying season), November (midseason) and February (end of spraying season). A multi-residue method was developed to extract organophosphate and organochlorine pesticides in whole blood. Although various methods exist, they allow only for the extraction of either organophosphates or organochlorines and not multi-residue extractions. This multi-residue method is based on the liquid/liquid extraction of a blood/Celite/ethanol mixture to extract the following pesticides: Azinphos-methyl, Chlorpyrifos, Endosulfan, Methidathion and Prothiophos. The pesticide residue levels were determined on gas chromatographs equipped with DB-5 and DB-2I0 capillary columns and flame photometric-, electron capture- and nitrogen/phosphorous detectors. The results were confirmed on a gas chromatograph with mass-selective detector in selective ion mode. Of the 402 blood samples analysed, 23 samples showed positive for organophoshates and 29 for organochlorines, and were sent for analysis on the mass spectrometer. Of those samples only one could be positively identified. The presence of the pesticide Endosulfan-B was confirmed. The confirmation of the pesticides was complicated by interfering substances that leached from the rubber stoppers of the collection vessels into the blood. Although the study showed that for practical purposes no pesticides were present, other important information was obtained about the handling and analyses of blood samples for pesticides.

Thesis (MTech (Public Management))--Cape Peninsula University of Technology, 2017. / The purpose of this study was to analyse the labour relations of the workers in the agricultural sector, with reference to the De Doors area in the Western Cape. Despite the political, social and economic changes to better the lives of the farm workers that have been implemented to rectify the inequalities of the past, the labour conditions on farms stayed unchanged. It is evident that there is a gap in the labour relations in the agricultural sector, due to the 2012/13 strike actions that took place. Qualitative research methodology was employed in the study; it provided the researcher with the opportunity to personally interact with the farm workers. It further allowed the researcher to gain a holistic understanding of the daily lives of the farm workers which would foster a better understanding of their daily struggles. Interviews were used as method of data collection. This methodology also enables the researcher to interpret and describe the actions of participants. Good labour relations play a vital role in any industry or organisation. Farm workers are generally classified as vulnerable and the most exploited group of the South African society. They often work irregular hours throughout the year in various weather settings. Regardless of the physical strain that their jobs entail, farm workers earn a low wage and are often deprived of the basic benefits that an employee should be entitled to. This was the reason the farm workers embarked on a strike in 2012/13. The researcher proposed recommendations to the Agricultural department on how to improve the labour relations on the farms in the De Doorns area by suggesting that more labour inspectors are being employed to oversee that legislation are implemented. Skills Development needs to be become compulsory for all farm workers as farming is becoming more technological. Skills Development unlocks talents and creative energy for the farm workers which have a positive impact on production.

Thesis (MTech (Environmental Health))--Peninsula Technikon, Cape Town, 2003 / Recent studies have reported an increased prevalence (19%) of respiratory symptoms among furm workers exposed to pesticides. International studies suggest excessive pesticide use and biological factors such as outdoor mites as important factors responsible for asthma symptoms. Studies in Korea suggest that spider mites may be responsible for allergic asthma symptoms among workers on fruit (citrus, apple, and . pear) furms. The fuming of wine and table grapes in South Africa involves about 3000 farms employing over 50,000 workers. Workers on table grape farms, in contrast to other fruit farms have not been previously investigated for occupational respiratory allergy to spider mites. Objectives • To determine the spectrum and prevalence of work-related allergy and asthma among table grape farm workers • To determine the environmental and host factors associated with work-related symptoms and allergic outcomes. Methods: A cross-sectional study was conducted on 207 workers employed on nine table grape farms in the Hex River valley of South Africa. A modified European Community Respiratory Health Survey questionnaire was used to interview workers. Skin prick tests used 8 commercial extracts of common airborne allergens (ALK) and potential occupational allergens, which included grape mould (Botrytis cinerea) and an in-house extract of spider mite, Tetranychus urticae. Specific IgE to Tetranychus urticae was determined using enzyme-linked immunosorbent assay (ELISA) and to house dust mite (Dermatophagoides Pteronyssinus) and storage mite (Lepidoglyphus Destructor) using Pharrnacia CAPRAST. Results: The mean age of the workers was 36 years with a standard deviation of 11 years.

杜平. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references (leaves 146-161) / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts in Chinese and English. / Du Ping.

Background: Agricultural workers in New Zealand have high rates of occupational injury compared to most other occupational groups. They are also over-represented in work-related fatal injury statistics. While it is recognised that the personal and social costs of occupational injuries to agricultural workers are considerable, the ability to develop and evaluate evidence-based injury control strategies for this group has been limited by the lack of quality information on occupational exposures and injury events. Aim: The aim of this thesis was to develop and pilot a comprehensive occupational exposure and acute injury outcome data collection system for agricultural workers which will provide an evidence base for a public health approach to acute occupational injury control within the agricultural sector of New Zealand. The thesis objectives were therefore to: * Develop study methods to collect occupational exposure and injury outcome information. * Assess the likely validity of these study methods. * Determine the feasibility of implementing the study methods. * Suggest modifications to the study methods to enhance their validity and feasibility. Methods: Pastoral farms in the Waitaki region of New Zealand were identified using a database of New Zealand farm owners. The owners and workers on these farms were contacted and asked to participate. Participants were required to complete an Initial Questionnaire which included items on farm and personal characteristics, the farm environment, training, safety perceptions and attitudes and safety behaviour. Participants were then monitored for six months. During the monitoring period each participant completed a monthly log of their work activities during the preceding week. Any work-related injuries to workers on participating farms were also recorded and reported monthly. Participants who were injured were followed up for an interview to obtain detailed injury event information. At the end of the monitoring period a second Questionnaire was administered to assess change during the study. Participants were asked about any occupational injury events during the study as part of one of the monthly logs and the second Questionnaire to provide a comparison measure to the monthly reports. A random third of participating farms were visited at the end of the study to assess the validity of participants� reports on the farm environment. Results: Sixty-two farms were recruited into the study, a recruitment rate of 24%. This resulted in 82 study participants. Fifty-seven farms and 72 participants completed the study, resulting in retention rates of 92% and 88% respectively. Return of study items was high, with the lowest observed level of return being 92%. Levels of response error were low in most of the study items, with exceptions being the recording of the hours spent handling animals (37%) and total hours worked (22%). Most postal items (over 68%) were returned before a reminder call was made. Participants� reports about the farm environment closely matched the observations made during the visits, with little evidence of significant misreporting. The validity of reported injury events during the study could not be determined, as the two methods of capturing injury events identified different events. Conclusions: Within the limitations of the study, most of the study methods appeared to be feasible and have acceptable validity. The low recruitment rate and issues with validating the capture of injury events indicated that modifications to the study design were necessary to achieve acceptable validity and feasibility, however. Recommendations were made on how feasibility and validity might be improved.