Evaluating hexaconazole leaching in laboratory and field experiments

Effects of application rate, soil type, and simulated rainfall

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

Research output: Contribution to journalArticle

Abstract

In the present study we investigated the leaching behaviour of hexaconazole fungicide in two soil packed columns, namely disturbed and undisturbed soil columns in field conditions. The effects of simulated rainfall (100 mL, 200 mL, and 400 mL) and application rate at recommended dosage (4.5 g a.i/palm tree) and double recommended dosage (9.0 g a.i/palm tree) were also studied. The residual of hexaconazole in the soil column was observed to be significantly different between the volumes of simulated rainfall application and decreased with increased soil depth. The highest concentrations were detected at the soil surface (0-10 cm), where 53-63% of the hexaconazole remained after applications. No significant difference was found between the disturbed and undisturbed soil packed column when treated with the recommended and double recommended dosages of hexaconazole. In order to understand the hexaconazole leaching pattern, a field study experiment with the same soil properties and application rate was conducted. The results showed that hexaconazole was distributed downward through the preferential flow and soil crack in the sandy loam soil profile. The groundwater ubiquity scores (GUS) Index for hexaconazole calculated in Malaysian soil was 4.61, indicating that hexaconazole has a high risk of contaminating groundwater resources.

Original languageEnglish
Pages (from-to)2163-2170
Number of pages8
JournalPolish Journal of Environmental Studies
Volume27
Issue number5
DOIs
Publication statusPublished - 1 Jan 2018

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soil column
Leaching
Rain
soil type
leaching
Soils
rainfall
Experiments
preferential flow
fungicide
groundwater resource
sandy loam
soil depth
soil profile
soil property
crack
soil surface
soil
groundwater
laboratory experiment

Keywords

  • Application rate
  • GUS index
  • Mobility
  • Simulated rainfall
  • Soil column

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Science(all)

Cite this

Evaluating hexaconazole leaching in laboratory and field experiments : Effects of application rate, soil type, and simulated rainfall. / Maznah, Zainol; Halimah, Muhamad; Sahid, Ismail; Idris, Abu Seman.

In: Polish Journal of Environmental Studies, Vol. 27, No. 5, 01.01.2018, p. 2163-2170.

Research output: Contribution to journalArticle

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