Dissipation of the fungicide hexaconazole in oil palm plantation

Zainol Maznah, Muhamad Halimah, Ismail Sahid, Abu Seman Idris

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Hexaconazole is a potential fungicide to be used in the oil palm plantation for controlling the basal stem root (BSR) disease caused by Ganoderma boninense. Therefore, the dissipation rate of hexaconazole in an oil palm agroecosystem under field conditions was studied. Two experimental plots were treated with hexaconazole at the recommended dosage of 4.5 g a.i. palm−1 (active ingredient) and at double the recommended dosage (9.0 g a.i. palm−1), whilst one plot was untreated as control. The residue of hexaconazole was detected in soil samples in the range of 2.74 to 0.78 and 7.13 to 1.66 mg kg−1 at the recommended and double recommended dosage plots, respectively. An initial relatively rapid dissipation rate of hexaconazole residues occurred but reduced with time. The dissipation of hexaconazole in soil was described using first-order kinetics with the value of coefficient regression (r2 > 0.8). The results indicated that hexaconazole has moderate persistence in the soil and the half-life was found to be 69.3 and 86.6 days in the recommended and double recommended dosage plot, respectively. The results obtained highlight that downward movement of hexaconazole was led by preferential flow as shown in image analysis. It can be concluded that varying soil conditions, environmental factors, and pesticide chemical properties of hexaconazole has a significant impact on dissipation of hexaconazole in soil under humid conditions.

Original languageEnglish
Pages (from-to)19648-19657
Number of pages10
JournalEnvironmental Science and Pollution Research
Volume22
Issue number24
DOIs
Publication statusPublished - 1 Dec 2015

Fingerprint

Fungicides
Palm oil
fungicide
dissipation
Oils
plantation
Soils
oil
Soil
soil
preferential flow
agricultural ecosystem
image analysis
half life
chemical property
Pesticides
environmental factor
persistence
pesticide
Image analysis

Keywords

  • Dissipation
  • Ganoderma
  • Hexaconazole
  • Oil palm
  • Preferential flow

ASJC Scopus subject areas

  • Environmental Chemistry
  • Health, Toxicology and Mutagenesis
  • Pollution

Cite this

Dissipation of the fungicide hexaconazole in oil palm plantation. / Maznah, Zainol; Halimah, Muhamad; Sahid, Ismail; Idris, Abu Seman.

In: Environmental Science and Pollution Research, Vol. 22, No. 24, 01.12.2015, p. 19648-19657.

Research output: Contribution to journalArticle

Maznah, Zainol ; Halimah, Muhamad ; Sahid, Ismail ; Idris, Abu Seman. / Dissipation of the fungicide hexaconazole in oil palm plantation. In: Environmental Science and Pollution Research. 2015 ; Vol. 22, No. 24. pp. 19648-19657.
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