Persistence of some fungicide and acaricide residues on and in cucumber fruits grown under green house condition [electronic resource].

Includes reference.

Cucumber were planted under greenhouse conditions. Cucumber plants were sprayed after 45 days from planted with four pesticides, diniconazole (Sumi eight 5% EC) as a recommended and flusilazole (Punch 40% EC), fenarimol (Rubigan 12% EC) and hexythiazox (Maccomite 10 % WP) as non recommended pesticides. Pesticides residues were determined on and in unwashed and washed cucumber fruits at intervals of zero ( one hour after spraying), 1, 3, 5, 7, 14,21 and 28 days after spraying. Residues analysis showed that diniconazole has the lowest initial deposits 0.68 ppm than the other tested pesticide where the initial deposits were 3.006, 1.56 and 0.855 ppm for fenarimol, flusilazole and hexythiazox, respectively. Data also indicated that the residual half lives values (t 1/2) were 5.431, 2.94, 1.98 and 1.95 days for fluslazole, diniconazole, fenarimole and hexythiazox, respectively in unwashed cucumber fruits. On the other hand, washing process removed 18.33, 10.24, 13.83 and 50.7% of initial deposits for flusilazole, diniconazole, fenarimole and hexythiazox, respectively. This findings indicating the significant role of washing process by running tap water in reducing and elimination of hexythiazox residues from contaminated cucumber fruits than other tested pesticide. Key words: Pesticides - Diniconazole - Flusilazole - Fenarimol - Hexythiazox - Cucumber.

Summary in Arabic.

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