Bioactivity, adsorption, and dissipation of pendimethalin in two Malaysian soils

Ismail Sahid, Kailasam Kalithasan

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Effects of environmental factors on bioactivity, adsorption, and persistence of pendimethalin was studied in the laboratory and greenhouse using rice (Oryza sativa L.) as the bioassay species. Herbicide bioactivity was inversely correlated with the organic matter (OM) content of the soil and directly correlated with herbicide concentrations. Pendimethalin adsorption increased proportionately at higher content of soil organic matter (SOM) and with increasing herbicide concentration. The apparent half-life of pendimethalin decreased from 23.9 days at 25°C to 19.4 days at 35°C in Selangor series soil and from 24.4 days at 25°C to 18.5 days at 35°C in Serdang Series soil. The apparent half-life of pendimethalin was shorter at a moisture level of 70% gravimetric water content than at moisture level of 30% in both soils. Under field conditions, the apparent half-life was 6.3 and 12.3 days at application rates of 1 kg and 3 kg ha-1, respectively.

Original languageEnglish
Pages (from-to)241-245
Number of pages5
JournalTropical Agriculture
Volume76
Issue number4
Publication statusPublished - Oct 1999

Fingerprint

pendimethalin
bioactivity
Adsorption
dissipation
adsorption
Soil
half life
herbicide
Herbicides
herbicides
Half-Life
soil
soil organic matter
moisture
persistence
environmental factors
application rate
bioassay
water
Oryza sativa

Keywords

  • Bioactivity; bioassay
  • Half-life
  • Pendimethalin
  • Persistence

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)

Cite this

Bioactivity, adsorption, and dissipation of pendimethalin in two Malaysian soils. / Sahid, Ismail; Kalithasan, Kailasam.

In: Tropical Agriculture, Vol. 76, No. 4, 10.1999, p. 241-245.

Research output: Contribution to journalArticle

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