Bioactivity, persistence and mobility of picloram in Selangor and Serdang soil series
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 (si...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Universiti Putra Malaysia Press
1999
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| Online Access: | http://psasir.upm.edu.my/id/eprint/3742/ http://psasir.upm.edu.my/id/eprint/3742/1/Bioactivity%2C_Persistence_and_Mobility_of_Picloram_m.pdf |
| _version_ | 1848839615211896832 |
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| author | B. S., Ismail K., Kalithasan |
| author_facet | B. S., Ismail K., Kalithasan |
| author_sort | B. S., Ismail |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-15T07:14:16Z |
| format | Article |
| id | upm-3742 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T07:14:16Z |
| publishDate | 1999 |
| publisher | Universiti Putra Malaysia Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-37422015-09-07T06:11:41Z http://psasir.upm.edu.my/id/eprint/3742/ Bioactivity, persistence and mobility of picloram in Selangor and Serdang soil series B. S., Ismail K., Kalithasan 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. Universiti Putra Malaysia Press 1999 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/3742/1/Bioactivity%2C_Persistence_and_Mobility_of_Picloram_m.pdf B. S., Ismail and K., Kalithasan (1999) Bioactivity, persistence and mobility of picloram in Selangor and Serdang soil series. Pertanika Journal of Tropical Agricultural Science, 22 (1). pp. 53-61. ISSN 0126-6128 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2022%20(1)%20Apr.%201999/08%20JTAS%20Vol.22%20(1)%201999%20(Page%2053%20-%2061).pdf |
| spellingShingle | B. S., Ismail K., Kalithasan Bioactivity, persistence and mobility of picloram in Selangor and Serdang soil series |
| title | Bioactivity, persistence and mobility of picloram in Selangor and Serdang soil series |
| title_full | Bioactivity, persistence and mobility of picloram in Selangor and Serdang soil series |
| title_fullStr | Bioactivity, persistence and mobility of picloram in Selangor and Serdang soil series |
| title_full_unstemmed | Bioactivity, persistence and mobility of picloram in Selangor and Serdang soil series |
| title_short | Bioactivity, persistence and mobility of picloram in Selangor and Serdang soil series |
| title_sort | bioactivity, persistence and mobility of picloram in selangor and serdang soil series |
| url | http://psasir.upm.edu.my/id/eprint/3742/ http://psasir.upm.edu.my/id/eprint/3742/ http://psasir.upm.edu.my/id/eprint/3742/1/Bioactivity%2C_Persistence_and_Mobility_of_Picloram_m.pdf |