Bioactivity, Persistence and Mobility of Picloram m Selangor and Serdang Soil Series

B. S., Ismail and K., Kalithasan (1999) Bioactivity, Persistence and Mobility of Picloram m Selangor and Serdang Soil Series. Pertanika Journal of Tropical Agricultural Science, 22 (1). pp. 53-61. ISSN 0126-6128

[img] PDF


The effects of environmental factors on bioactivity, persistence and mobility of picloram were studied in the laboratory and greenhouse using long beans (Vigna sinensis Endl. ex Hassk), as a bioassay species. Two soils were used, namely Selangor series (silty clay loam soil) and Serdang series (silty clay soil). The bioactivity of picloram (Tordon®) was inversely correlated with the organic matter content of the soil and increased with increasing herbicide concentrations. The half-life ofpicloram decreased from 33.1 to 24.1 days as soil temperature increased from 25°C to 35°C in the Selangor series, and from 28.1 to 17.7 days in the Serdang series soil. The degradation rate of picloram also increased with increasing moisture level in both soil series. However, picloram persisted longa in Selangor series soil than in Serdang series. Downward mobility through the soil profile was inversely related to the organic maller content of the soil. The quantity and frequency of simulated rain directly influenced the extent of leaching of the herbicide. Downward movement of picloram was greater in Serdang series which contains less organic matter but high sand than Selangor series longest available vessel.

Item Type:Article
Keyword:bioactivity, mobility, organic matter, persistence, pic10ram
Publisher:Universiti Putra Malaysia Press
ID Code:3742
Deposited By: Nasirah Abu Samah
Deposited On:01 Dec 2009 04:03
Last Modified:27 May 2013 07:10

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 01 Dec 2009 04:03.

View statistics for "Bioactivity, Persistence and Mobility of Picloram m Selangor and Serdang Soil Series"

Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.