Mansingh, Ajai; Robinson, Dwight,E.; Wilson, Arlene
Author Affiliation, Ana.
Life Sciences (Botany and Zoology); Faculty of Pure and Applied Sciences
Insecticide contamination of the Jamaican environment I. Pattern of fluctuations in residue levels in the rivers of Hope Watershed (1989-1991)
Jamaican Journal of Science and Technology
Date of Publication
Monthly monitoring of insecticide residues in water and sediment of four major rivers of the Hope River watershed (Hope River, Mammee River, Hog Hole River, Salt River) during 1989, 1990 and 1991 revealed the presence of endosulfan in 29-57, 40-60 and 9-55% dieldrin in 14-29, 0-10 and 0-9%, and diazinon in 0-14, 0-46 and 9-46%, respectively. The data obtained suggest a correlation between the type and amount of pesticide sprayed, the time and frequency of application, the seasonality of rainfall, which is most frequent in June-December, and the frequency and concentrations of residues detected. Recommendations: integrated management of coffee pests and pesticides by coffee farmers; judicious use of poisonous chemicals; reducing runoff of residues by management of soil erosion and promoting their microbial degradation before they get into rivers....