Evaluating hexaconazole leaching in laboratory and field experiments: effects of application rate, soil type, and simulated rainfall

• Autorzy: Maznah Z. , Halimah M. , Ismail B.S. , Idris A.S.
• Języki publikacji: EN

Abstrakty

EN

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.

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2018
• Tom: 27
• Numer: 5
• Opis fizyczny: p.2163-2170,fig.

Twórcy

autor

Maznah Z.

• Analytical and Quality Development Unit, Product Development and Advisory Services Division (PDAS), Malaysian Palm Oil Board (MPOB), Selangor, Malaysia

autor

Halimah M.

• Analytical and Quality Development Unit, Product Development and Advisory Services Division (PDAS), Malaysian Palm Oil Board (MPOB), Selangor, Malaysia

autor

Ismail B.S.

• School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), Selangor, Malaysia

autor

Idris A.S.

• Ganoderma and Diseases Research for Oil Palm Unit (GanoDROP), Biological Research Division, Malaysian Palm Oil Board (MPOB), Selangor, Malaysia

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Identyfikatory

DOI

10.15244/pjoes/78043