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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 7, No. 1, 2010, pp. 175-182
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Bioline Code: st10019
Full paper language: English
Document type: Short Communication
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 7, No. 1, 2010, pp. 175-182
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Determination of organophosphorus insecticide residues in the rice paddies
Arjmandi, R.; Tavakol, M. & Shayeghi, M.
Abstract
In most rice paddies in Mazandaran Province, diazinon is applied to control Chilo suppressalis. Due
to the extensive application of insecticides in the rice paddies of the Caspian coasts of Iran, this investigation was
carried out on the rice fields in order to obtain the necessary data and information on the concentration of insecticide
residues. A total of 125 samples were taken from five areas of Amol township in 2007. Then, according to the analysis
of variance procedures, the water samples were statistically analyzed after the spraying of diazinon. Results indicate
that the insecticide was used frequently to control stem boring caterpillar of rice. The residuals of this toxic chemical
were observed in the majority of stations from the day after the spraying until one to two months later. The greatest
level of diazinon was observed in station 1 in amount of 1.14 ppm. This study revealed that the physical and chemical
properties of the studied diazinon such as fumigation characteristic as well as the ecological conditions and soil type
influence the reduction and eventual removal of the insecticides during the cultivation and harvest periods.
Keywords
Insecticide; Rice; Sampling; Statistical methods; Thin layer chromatography
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