| Autor: |
John M. Harkin, Ibrahim A. M. Saeed, Douglas I. Rouse |
| Rok vydání: |
1996 |
| Předmět: |
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| Zdroj: |
Pesticide Science. 46:375-380 |
| ISSN: |
0031-613X |
| DOI: |
10.1002/(sici)1096-9063(199604)46:4<375::aid-ps370>3.0.co;2-z |
| Popis: |
Soil column studies were undertaken to investigate the influence of soil water content and irrigation on leaching, distribution and persistence of methyl isothiocyanate (MITC) in a sandy soil chemigated with the soil fumigant metam-sodium. No leaching was obtained from columns at low water content (0.042 or 0.074 cm 3 cm -3 ). However, 8.4 (±2.8), 34.2 (±7.4) and 119.4 (±8.3) μg of MITC leached from columns at 0.105, 0.137 and 0.168 cm 3 cm -3 water content, respectively. Increased leaching resulted from sprinkler application of 25-mm of water to columns at 0.137 cm 3 cm -3 water content. Leaching of MITC constituted only a small fraction of the amount applied even in the worst case. Methyl isothiocyanate persisted in soil for 15 days at 2°C in varying amounts under the different water regimes. Relatively high amounts of MITC residues (8-12 mg kg -1 soil) were detected in the top 25-cm layer of all the soil columns. Degradation was the major pathway of dissipation for the chemical despite the soil water regime. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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