investigation of the residues of chlorpyrifos and diazinon in apple fruit in damavand region

considering the increased use of fertilizers and pesticides in agriculture in recent decades and increasing risks of diseases and environmental hazards in human society’s , standards of remaining pesticides in food and agricultural products required to be considered.in this study, residues of chlorpyrifos and diazinon in apple in the damavand region evaluated. sampled randomly from the apple orchards based on statistical calculation was performed. after the extracts from appels, residues of pesticide measured, by gas chromatography. according to the results, the mean amount of residues of diazinon is 0.65 and 0.7ppm, in the golden and red varieties of apple, respectively. also the mean amount of residues of chlorpyrifos is 1.08 and 1.34 ppm, in the golden and red varieties of apple, respectively.the use of fertilizer increases products reducing the damage caused by diseases, weeds and plant pests. however, it makes the residue of pesticides in agricultural products increase. comparison of statistical results with international standards showed that residues of chlorpyrifos (c8h11cl3no3p s) in damavand apple orchards exceeded the world.