Persistence and mobility of granular insecticides in an organic soil following furrow application for onion maggot control
| Autor: | Carol Harris, J.R. Robinson, R. A. Chapman, H. J. Svec |
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| Rok vydání: | 1984 |
| Předmět: | |
| Zdroj: | Journal of Environmental Science and Health, Part B. 19:259-270 |
| ISSN: | 1532-4109 0360-1234 |
| DOI: | 10.1080/03601238409372430 |
| Popis: | Ethion, fonofos, fensulfothion, carbofuran, or chlorpyrifos was applied as a commercial granular formulation at rates equivalent to 2.24, 1.12, 1.12, 1.68, and 1.68 kg AI ha‐1, respectively, to furrows in 33 x 26 x 11 cm volumes of an organic soil. Treated soils were kept in a greenhouse and subjected to 4 different watering schedules ("normal”;, 0.5, 1.0 and 1.5 mL cm‐2). Persistence and movement of the insecticides was measured by glc analysis of soil cores taken directly from the treated furrow and from each side in duplicate samples at 2, 4, 6, 8, and 10 wk after treatment. In‐furrow cores taken 10 wk after treatment were sectioned and the top, middle and bottom sections were analyzed separately. Water not retained by the soil was collected and analyzed also. Overall persistence was: ethion ? chlorpyrifos ? fonofos >> carbofuran ? fensulfothion. Car‐bofuran and fensulfothion disappearance was slightly faster in the 2 wetter soils, ca. 50% the concentration present in the drier soils at 10 wk.... |
| Databáze: | OpenAIRE |
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