Abstract: By using stable carbon isotope analysis technique, the distribution characteristics of stable carbon isotope composition (δ¹³C values) in the fruit, peduncle, and leaf of Schisandra chinensis from Liaoning Province were studied, and the correlations between fruit δ¹³C value and environmental
 factors were analyzed. It was found that the organ-specific difference in δ¹³C values was highly significant (P<0.01), with the sequence of fruit (-26.356‰±0.377‰) > peduncle (-26.620‰±0.342‰) > leaf (-28.327‰±0.370‰), which suggested that there was a distinct post-photosynthetic δ¹³C fractionation between photosynthetic and non-photosynthetic organs. During the growth period of S. chinensis, the δ¹³C value of fruit remained relatively stable, that of peduncle decreased, and that of leaf decreased significantly (P<0.001). The δ¹³C value of fruit had a slight increase with
increasing latitude, and had an insignificant negative relationship with atmospheric CO₂. The variation of fruit δ¹³C value with latitude could be used
 as an indicator to distinguish different origins of S. chinensis.

Key words: Liposcelis bostrychophila, Fumigation, DDVP, Lethal reaction