Fate of chlorothalonil, chlorpyrifos and profenofos in a vegetable farm in Cameron Highlands, Malaysia

C. K. Ngan, U. B. Cheah, W. Y Wan Abdullah, K. P. Lim, Ismail Sahid

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The fate of chlorothalonil, chlorpyrifos and profenofos in sandy loam soil under tropical condition was studied in a vegetable plot in the Cameron Highlands, Malaysia. The plot was treated with chlorothalonil, chlorpyrifos and profenofos according to normal agricultural practices of the Cameron Highlands. Water (runoff and lysimeter), soil and bedload sediment samples were taken according to a sampling schedule. Residues in water, soil and bedload sediment samples were laboratory analysed to determine amount. Chlorothalonil residues were detected in the range of < 0.01-0.08 mg/kg in the soil, < 0.01-0.02 ng/mL in the leachate, < 0.01-0.02 ng/mL in the runoff and < 0.01-0.11mg/kg in the sediment. Field studies of chlorpyrifos showed residue levels of < 0.01-0.06 mg/kg in the soil, < 0.01-0.07 ng/mL in the leachate, < 0.01-0.08 ng/mL in the runoff and < 0.01-0.62 mg/kg in the sediment. Residue levels of profenofos were detected in the range of < 0.01-0.02 mg/kg in the soil, < 0.01-0.87 ng/mL in the leachate, < 0.01-0.08 ng/mL in the runoff and < 0.01-0.35 mg/kg in the sediment. The three pesticides dissipated rapidly, with DT50 (time for 50% loss) of less than two days. The study showed that these pesticides dissipated rapidly under the climatic conditions of the Cameron Highlands in Malaysia.

Original languageEnglish
Pages (from-to)125-136
Number of pages12
JournalWater, Air, and Soil Pollution: Focus
Volume5
Issue number1-2
DOIs
Publication statusPublished - Jan 2005

Fingerprint

chlorpyrifos
Vegetables
Farms
vegetable
farm
Sediments
Runoff
Soils
runoff
leachate
sediment
bedload
Pesticides
soil
pesticide
Lysimeters
lysimeter
agricultural practice
sandy loam
soil water

Keywords

  • Chlorothalonil
  • Chlorpyrifos
  • Fate
  • Profenofos
  • Soil
  • Vegetable farm and water

ASJC Scopus subject areas

  • Pollution
  • Earth and Planetary Sciences(all)
  • Earth-Surface Processes

Cite this

Fate of chlorothalonil, chlorpyrifos and profenofos in a vegetable farm in Cameron Highlands, Malaysia. / Ngan, C. K.; Cheah, U. B.; Abdullah, W. Y Wan; Lim, K. P.; Sahid, Ismail.

In: Water, Air, and Soil Pollution: Focus, Vol. 5, No. 1-2, 01.2005, p. 125-136.

Research output: Contribution to journalArticle

Ngan, C. K. ; Cheah, U. B. ; Abdullah, W. Y Wan ; Lim, K. P. ; Sahid, Ismail. / Fate of chlorothalonil, chlorpyrifos and profenofos in a vegetable farm in Cameron Highlands, Malaysia. In: Water, Air, and Soil Pollution: Focus. 2005 ; Vol. 5, No. 1-2. pp. 125-136.
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AB - The fate of chlorothalonil, chlorpyrifos and profenofos in sandy loam soil under tropical condition was studied in a vegetable plot in the Cameron Highlands, Malaysia. The plot was treated with chlorothalonil, chlorpyrifos and profenofos according to normal agricultural practices of the Cameron Highlands. Water (runoff and lysimeter), soil and bedload sediment samples were taken according to a sampling schedule. Residues in water, soil and bedload sediment samples were laboratory analysed to determine amount. Chlorothalonil residues were detected in the range of < 0.01-0.08 mg/kg in the soil, < 0.01-0.02 ng/mL in the leachate, < 0.01-0.02 ng/mL in the runoff and < 0.01-0.11mg/kg in the sediment. Field studies of chlorpyrifos showed residue levels of < 0.01-0.06 mg/kg in the soil, < 0.01-0.07 ng/mL in the leachate, < 0.01-0.08 ng/mL in the runoff and < 0.01-0.62 mg/kg in the sediment. Residue levels of profenofos were detected in the range of < 0.01-0.02 mg/kg in the soil, < 0.01-0.87 ng/mL in the leachate, < 0.01-0.08 ng/mL in the runoff and < 0.01-0.35 mg/kg in the sediment. The three pesticides dissipated rapidly, with DT50 (time for 50% loss) of less than two days. The study showed that these pesticides dissipated rapidly under the climatic conditions of the Cameron Highlands in Malaysia.

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