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The use of chlorpyrifos to control American bollworm (helicoverpa armigera) in oranges (citrus sinensis l.) in the Eastern Cape province of South Africa

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dc.contributor.advisor Modise, D. (Prof.)
dc.contributor.advisor Lebusa Molapo, M. M. (Ms.)
dc.contributor.author Siyoko, Kotose Joseph
dc.date.accessioned 2011-09-23T05:27:46Z
dc.date.available 2011-09-23T05:27:46Z
dc.date.issued 2011-02
dc.identifier.uri http://hdl.handle.net/10500/4828
dc.description.abstract The objectives of this study were to establish the effectiveness of chlorpyrifos in suppressing H. armigera population in oranges and to determine the effect chlorpyrifos had on the health of farm pesticide operators. Experiments showed that by applying chlorpyrifos on orange trees, H. armigera larvae population was suppressed significantly. High fruit yields were realized from trees that were sprayed with chlorpyrifos. Visual observation of personnel involved in pesticide related duties, revealed that judicious use of pesticides was not practiced by farm workers in all three farms. Data analysis from questionnaires, health records and interviews proved that farm workers suffered from illnesses that were pesticide related. It was mainly those farm workers in the age group of 31 to 35 years who suffered the most from pesticide related illnesses. en
dc.format.extent 1 online resource (104 leaves)
dc.language.iso en en
dc.subject Effectiveness en
dc.subject Chlorpyrifos en
dc.subject H. armigera en
dc.subject Oranges en
dc.subject Yields en
dc.subject Pesticides en
dc.subject Judicious use en
dc.subject Farm workers en
dc.subject Health records en
dc.subject Illnesses en
dc.subject.ddc 634.3197809687
dc.subject.lcsh Oranges -- Diseases and pests -- Control -- South Africa -- Eastern Cape
dc.subject.lcsh Helicoverpa armigera -- Control -- South Africa -- Eastern Cape. Chlorpyrifos -- South Africa -- Eastern Cape
dc.title The use of chlorpyrifos to control American bollworm (helicoverpa armigera) in oranges (citrus sinensis l.) in the Eastern Cape province of South Africa en
dc.type Thesis en
dc.description.department Agriculture and Life Sciences
dc.description.degree M. Sc. (Agriculture)


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