In 2016 and 2017, population density of Monochamus saltuarius, a vector beetle species of pine wood nematode, was estimated from Korean white pine forests using mark-release-recapture. The beetle was captured by multi-funnel traps with pheromone lure. We collected 1,590, 185, and 268 individuals from Hongcheon (2016), Hongcheon (2017), and Yangpyeong (2017), respectively. Recapture rates in 2016 and 2017 were ranged from 2.38 % to 5.06 %, and estimated population densities during two years were ranged from 4,824 to 13,340 individuals per 1 ha. Because of low recapture rates in both years, population density of M. saltuarius in Korean white pine forests may be over-estimated.

The objectives of this study were to examine the genetic variation of 20-year-old tree height and to estimate heritabilities and genetic gains of Korean white pine. Analysis of variance showed that families and family x block interaction had the significant (p=0.01) effects on tree height. However, family variation appears to be much greater than the variation due to family x block interaction. Individual tree heritability was higher (hI2=0.73) than family heritability, (hF2=0.83) therefore, combined selection showed the largest genetic gain (17.76%) in a given equal intensity of selection.