Distribution Behaviour of Dimethoate in Tea Leaf

Shivani  Jaggi; Bikram  singh; Adarsh  Shanker

doi:10.4236/jep.2011.24056

Shivani Jaggi^*, Bikram singh, Adarsh Shanker

Abstract: A study was undertaken to assess the distribution behaviour of Dimethoate in tea leaf. Tea bushes were subjected to Dimethoate spray at recommended dose and double the recommended doses. The extraction of pesticide was done using chloroform and the analysis was done using a Hewlett-Packard 5890 series II gas chromatograph with Nitrogen Phosphorus Detector (NPD). The penetration behaviour of Dimethoate was studied in dry and wet seasons. Variations in penetration were observed in dry and wet seasons which was attributed to climatic factors like temperature, humidity, rainfall, sunlight and physicochemical properties of the residue like water solubility, partition coefficient and formulation type. Residues observed in the cell wall and tissues confirm its good penetrating ability inspite of its hydrophilic nature. Higher penetration in wet season as indicated can be attributed to the route through the stomatal pores.

Keywords: Tea, Cuticle, Dimethoate, Dissipation

Cite this paper: nullS. Jaggi, B. singh and A. Shanker, "Distribution Behaviour of Dimethoate in Tea Leaf," Journal of Environmental Protection, Vol. 2 No. 4, 2011, pp. 482-488. doi: 10.4236/jep.2011.24056.

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