RESIDUES OF LAMBDA-CYHALOTHRIN IN /ON ORANGE FRUITS AND ITS EFFECT ON SOME QUALITY PROPERTIES

Document Type : Original Article

Authors

1 Pesticide Department, Faculty of Agriculture, Menoufia University, Egypt.

2 Pesticide Residues and Environmental Pollution Department, Agricultural Research Center Dokki, Giza, Egypt

3 Pesticide Department, Faculty of Agriculture, Menoufia University, Egypt

4 Pesticide Chemistry Department, Faculty of Agriculture (El-Shatby), Alexandria University, Egypt.

Abstract

Pesticides are known to interfere with the biochemical processes of plants, lowering their food quality. Therefor, this study was designed to evaluate persistence of Lambda-cyhalothrin in / on fresh orange fruits and investigate its effect on fruit quality. The insecticide residues were determined using GC- ECD system. Also, the biochemical parameters were determined using spectrophotometric techniques. The results showed that a waiting period of 7days after application on orange is enough to reduce the Lambda-cyhalothrin residues to below the maximum residue limits (MRL). Lambda-cyhalothrin rapidly disappeared with half-life (t ½) of 1.6 days on orange fruits. Furthermore, the ascorbic acid content and dry matter percentage were significantly reduced however, total protein content, acidity (%), moisture(%) and total soluble solids (T.S.S,%) were significantly increased in  Lambda-cyhalothrin treated compared to untreated orange fruits.

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