• Journal of Korean Society of Forest Science
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• v.96 no.4
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• pp.414-418
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• 2007

The average number of oviposion scars in lower (facing the Land) and upper part (facing the Sun) of P. koraiensis logs were $16.3{\pm}13.9$ and $3.3{\pm}3.6$, respectively. Oviposition preference of Monochamus saltuarius adults was lower part of Pinus koraiensis. Estimated average number of larvae and egg from oviposition scars ($64.7{\pm}23.8$) in P. koraiensis logs was $18.8{\pm}10.0$ in the laboratory condition. However, oviposition scars were $63.6{\pm}31.1$ and average number of larvae and egg was $2.0{\pm}2.6$ in field condition. When we fed with inner bark (phloem) and xylem of P. koraiensis, body weight of M. saltuarius larvae was normal. However, when we only fed xylem of P. koraiensis, body weight and size were reduced but they were recovered after feeding inner bark (phloem). Esterase isozymes were assessed from larvae fat body of M. saltuarius and Est1 were specifically activated when we fed with inner bark (phloem) and xylem.

• Korean journal of applied entomology
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• v.24 no.4 s.65
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• pp.195-201
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• 1986

This study was conducted to investigate the life history of Compsidia populnea which is major species of the stem-borers on Populus alba{\times}glandulosa$. Peak emergence of the adult of Compsidia populnea L. was around 10th${\sim}$l2nd of May in Chuncheon vicinities, having one generation a year in Korea. There was a preovipositional period of 10.7 days and a ovipositional period of 14.3.days. Mean adult longevity was 11 days for male and 13.8 days for female. Individual eggs were long oval with somewhat narrowed tip at one side and soft, 2.6mm in length, 0.8mm in diameter, and were laid singly under the U-shaped scars which were made by female before oviposition. Total number of scars per female averaged 56.6 ($8{\sim}135$) and eggs were found in 67.9 percent of the total scars. Egg period was $8{\sim}11$ days at $25^{\circ}C$ constant temperature and $7{\sim}14$ days in the field condition. Early young larvae stayed for $2{\sim}3$ weeks under the scars and then boring into the xylem, forming galls at this time. Size of the gall was 1.8cm($1.3{\sim}2.5$) in length, 1.6cm($1.0{\sim}2.2$) in diameter and the length of mine was everage 3.1cm. Fully grown larvae were developed around the early October and overwintered in the mines of galls. Pupation was done around the early of April. Pupal developmental period averaged 11 days($9{\sim}13$ days) at $25^{\circ}C$ constant temperature condition.