Influence of apple bagging on heavy metal and pesticide residue in apple fruit

The paper discusses the experimental results conducted in Luochuan and Baishui orchards on content of certain heavy metals like Pb, Cd, Cr as well as pesticide residue on the bagged apples, double bagged apples and no-bagged apples ,respectively. There are two results. The contents of certain heavy metals and pesticide residue on non-bagged apples are greater than those of bagged ones, while those of single layer bagged ones are greater than those of double bagged ones. Heavy metals are primarily concentrated on the apple peel. The content of cyfluthria in no-bagged apples is 0.03 mg/kg, 3 times that of single layer bagged ones while none found in the double bagged ones. It is concludeed that apple bagging is an effective measure to ensure the apple sanitary safety.