국내에서 재배하는 주요 핵과류(복숭아, 자두, 매실, 체리)에 발생하는 깍지벌레는 뽕나무깍지벌레(Pseudaulacaspis pentagona), 말채나무공깍지벌레(Lecanium corni), 무화과깍지벌레(Coccus hesperidum), 가루깍지벌레류(Pseudococcus sp.) 4종이 발견되었으나, 뽕나무깍지 벌레는 2017년에 총 113과원 중 103과원(발생과원율 91.2%), 2018년에는 77과원 중 64과원(발생과원율 83.1%) 모든 핵과류에서 가장 많이 발생하여 우점종으로 확인되었다. 2017년도에는 5월 상순부터 부화를 시작하여 암컷성충 1마리가 평균 75.5개(47∼159개)의 알을 낳으며 모든 알이 부화하는데 약 19일이 소요되었으며 5월 20일경에 월동성충의 모든 알이 부화하였다. 그러나, 2018년에는 4월 하순부터 부화를 시작하여 (부화율 72%) 부화유충(1령)으로 이동 후 5월 중순부터 고착유충(2~3령), 6월 중순부터 2세대 성충이 활동하기 시작하였다. 부화유충기(1령)에 약제 살포를 하면 살충율이 100.0%이었으나, 고착유충기(2~3령)에는 살충율은 2.7%에 불과하였다. 부화약충기를 제외한 모든 단계에서 몸체가 밀납깍지로 덮여 있어 약제를 살포하여도 직접 접촉되지 않아 치사율이 낮았다. 따라서 반드시 부화약충기에 약제를 살포하여야 방제효과를 높일 수 있다.

Purpose: This study is to explore which genre of sports culture contents will show the most consistent growth in the future and analyse the development outlook based on those results. Research design, data, and methodology: Case study was used for this research as it seemed to be the most appropriate approach in order to obtain the most complete and meaningful information from a particular phenomenon. A total of 15 participants were chosen to participate in a semi-structured in-depth interview and the recordings were typed out as text. In order to ensure validity and credibility of findings, peer and member check were conducted. Results: As a result, the sports culture content that is most likely to consistently grow in the future is games. Additionally, it is expected that sports culture contents will develop as new categories of sports culture contents emerge, as the evolution of sports culture content occurs through the combination with technology, as well as the activation of sensual sports contents, and the production of sports culture contents utilizing big data. Conclusions: It is concluded that convergence of sport, cultural contents, and technology will promptly progress, and it will promote the development of sport culture contents and related industry.

Purpose: This study sought to explore the effects of sport enjoyment on leisure commitment. Research design, data, and methodology: Subjects of this study are members of MTB participation in Seoul and Gyeonggi area and were selected by purposive sampling out of non-probability sampling. 295 questionnaires were collected and 288 questionnaires were used for the study. To analyze data, frequency analysis, factorial analysis, t-test, ANOVA, correlation and regression analysis were employed. Results: First, as for leisure satisfaction and leisure commitment pursuant, there was significant difference in gender, age, the number of participation in weekly leisure, and hours of participation in weekly leisure. Second, regarding MTB participants' amusement and leisure satisfaction competence had significant influence on all the sub-factors of leisure satisfaction and that both achievement and competence had impacts on social leisure satisfaction. Third, regarding effects on leisure commitment, competence of amusement had impacts on cognitive and behavioral leisure commitment. Fourth, regarding relationships between leisure satisfaction and leisure commitment, satisfaction of mental leisure, social leisure, relaxation leisure, physiological leisure and leisure satisfaction had significant influence on cognitive commitment. Conclusions: Summary of above results showed that MTB participants' amusement factor had significant influence on leisure satisfaction and leisure commitment. Implications were discussed. Keywords: MTB, amusement factor, leisure commitment

A single cross hybrid, 'Heugjeomchal', is a white and black bicolor waxy corn (Zea mays L.) developed by the Maize Experiment Station (MES), Gangwondo Agricultural Research and Extension Services (GARES) in Hongcheon in 2000. 'Heugjeomchal' was made by cr