Use, fate, and ecotoxicity of pesticides in Jamaica and the Commonwealth Caribbean

Mansingh, Ajai; Robinson, Dwight E.; Dalip, Kathy

doi:10.1201/9780203165584-34

Pesticide Residues in Coastal Tropical Ecosystems 2002

DOI: 10.1201/9780203165584-34

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Use, fate, and ecotoxicity of pesticides in Jamaica and the Commonwealth Caribbean

Ajai Mansingh¹,

Dwight E. Robinson²,

Kathy Dalip³

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Cited by 3 publications

References 12 publications

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Terra vera technology usage for suppression of coffee leaf rust Hemileia vastatrix in Brandon Hill, Jamaica

Goodridge,

Ozongwu,

Emanuel

et al. 2023

HIJ

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In Jamaica the incidence of Coffee Leaf Rust (CLR) continues to contribute to the reduction in coffee production annually. Terra Vera Technology (TV) offers a safer alternative to Highly Hazardous Pesticides (HHP) due to its formulation of a non-toxic, all-natural solution. This investigation aimed to assess the efficacy of TV on coffee plants displaying symptoms of coffee leaf rust (CLR). The experimental research plot was established in the Blue Mountain coffee growing region of Brandon Hill, St Andrew, where plants were assessed for the incidence of CLR. Disease presenting plants were allocated with one of four experimental conditions; a 2:1 or 3:1 solution of reverse osmosis (RO) water to TV, RO water alone or no-application at all. Each experimental condition included plants with a range of disease severities as determined using a disease severity chart. The evidence presented may suggest some level of suppression of CLR from the use of TV on infected coffee plants. The relative change in disease severity was reduced on the coffee plants that were applied with TV versus the controls assessed over a nine-week period. For all the coffee plants that were applied with TV, the decrease in levels of CLR observed was consistent for both concentrations. The 3:1 TV was less effective than the 2:1 TV, from week 5 of TV applications and assessments; a significant (< 0.05) difference between the TV 3:1 and TV 2:1 was observed. The results generated are indicative of the 2:1 TV concentration as being a potential antifungal agent for the treatment and suppression of CLR disease.

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Terra vera technology usage for suppression of coffee leaf rust Hemileia vastatrix in Brandon Hill, Jamaica

Goodridge,

Ozongwu,

Emanuel

et al. 2023

HIJ

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Toxicity of Endosulfan to the Red Hybrid Tilapia

Williams¹,

Robinson²

2015

OnLine Journal of Biological Sciences

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Bioaccumulation and Tissue Partitioning of Endosulfan by the Red Hybrid <i>Tilapia</i>

Robinson¹

2015

OnLine Journal of Biological Sciences

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The frequent use of endosulfan in agricultural activity on steep slopes in Jamaica and subsequent contamination of rivers by the residues resulted in a need to assess the levels of bioaccumulation of sub-lethal doses of the insecticide in river fauna using Tilapia fish as a test subject. Bioconcentration of α-and β-endosulfan by the Red Hybrid Tilapia, from 0.0075 mg L −1 in the surrounding water, reached a peak (0.578 ppb and 0.442 ppb, respectively) in one to four hours but fluctuated during the rest of the 72h observation period. A similar pattern of bioaccumulation was recorded when the fish were exposed to 0.015 mg L −1 , except that the peak bioaccumulation of α-and β-isomers after one hour of exposure were 0.54 and 0.44 mg L −1 , respectively. The contaminated fish (from 24-h exposure to 0.015 mg L −1) eliminated only 18 to 31% of endosulfan residues after 24 h and 26 to 39% after 72-h exposure to uncontaminated water. During the process of bioconcentration, endosulfan was metabolized to endosulfan lactone and sulfate; the degradation was more during the elimination process when exposed to clean water. Maximum amounts of α-and β-endosulfan and their metabolites were partitioned in gonads > liver > gills > skin/muscle/bone.

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Use, fate, and ecotoxicity of pesticides in Jamaica and the Commonwealth Caribbean

Cited by 3 publications

References 12 publications

Terra vera technology usage for suppression of coffee leaf rust Hemileia vastatrix in Brandon Hill, Jamaica

Terra vera technology usage for suppression of coffee leaf rust Hemileia vastatrix in Brandon Hill, Jamaica

Toxicity of Endosulfan to the Red Hybrid Tilapia

Bioaccumulation and Tissue Partitioning of Endosulfan by the Red Hybrid <i>Tilapia</i>

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