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 language | English |
|---|---|
| Pages (from-to) | 241-245 |
| Number of pages | 5 |
| Journal | Tropical Agriculture |
| Volume | 76 |
| Issue number | 4 |
| Publication status | Published - Oct 1999 |
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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 journal › Article
}
TY - JOUR
T1 - Bioactivity, adsorption, and dissipation of pendimethalin in two Malaysian soils
AU - Sahid, Ismail
AU - Kalithasan, Kailasam
PY - 1999/10
Y1 - 1999/10
N2 - 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.
AB - 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.
KW - Bioactivity; bioassay
KW - Half-life
KW - Pendimethalin
KW - Persistence
UR - http://www.scopus.com/inward/record.url?scp=0002957168&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0002957168&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0002957168
VL - 76
SP - 241
EP - 245
JO - Tropical Agriculture
JF - Tropical Agriculture
SN - 0041-3216
IS - 4
ER -