PERSISTENCE AND FATE OF FENITROTHION AND CHLORPYRIFOS-METHYL RESIDUES IN SUGAR-BEET PLANTS AND SOIL | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 6, Volume 78, Issue 4, December 2000, Page 1509-1516 PDF (2.03 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2000.399712 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| SHOKR A. A. SHOKR | ||||
| Central Agricultural Pesticides Laboratory, Agricultural Research Centre, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| These studies were carried out to investigate the residual behaviour of fenitrothion and chlorpyrifos-methyl organoghosphorus insecticides on sugar-beet (vegetative parts and roots) and the contamination of soil under these plants. The residue half-life values (RL50) determined on vegetative parts and soil were 16.8 and 134.4 hours for fenitrothion and 14.4 and 118.8 hours for chlorpyrifos-methyl, respectively. In vegetative parts, the initial amount detected for fenitrothion (28.843 ppm) was higher than the initial amount found for chlorpyrifosmethyl (5.170 ppm), while the initial concentration detected in sugar-beet roots was very low (0.012 ppm and 0.019 ppm) for fenitrothion and chlorpyrifos-methyl, respectively. The vegetative parts did not have any detectable residues of fenitrothion and chlorpyrifos-methyl at 16 days from application. No detectable amount of fenitrothion and chlorpyrifos-methyl residues were found in the roots after 9 days from treatment. Fenitrothion and chlorpyrifos-methyl were found to be short persistent in the vegetative parts, but they were more stable in the soil. | ||||
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