솔잎혹파리 抵抗性 選拔木의 몇가지 特性

Some Characteristics on the Resistance Selections of Pine Trees to Pine Gall Midge (Thecodiplosis japonesis)

The resistant Korean red pines(Pinus densiflora) to pine gall midge (Thecodiplosis japonensis) were selected at the heavily infested pine forests in Kyung Gi area. The investigations, for the preliminary studies, on growth habit of the resistant selection, ovipositional preferance, rate of infestation, rate of gall formation and larval development, were carried out during the period from March to August 1980. The elongation of newly emerged shoots and needles of the resistant selection were more vigorous than that of the contrast susceptible plants. However, there were no significant difference on the ovipositional preferance between resistant or susceptible plants. Out of 20 selected plants, one outstanding individual(SN-D-2) showed reduced infestation rate and gall formation rate. And also this specific seemed to inhibit the larval development.