곰솔과 소나무 自然雜種의 솔잎흑파리에 대한 耐蟲性

• 영문명: Resistance of the natural hybrids of pinus thunbergii and pinus densiflora to pine gall midge
• 발행기관: 한국육종학회
• 저자명: Dao Sik Son(孫斗植) Ka Aeng Ha(河佳鶯) Sang Jun Park(朴相俊) Jae Woo Hwang(黃在寓) Sang Rak Lee(李相錄)
• 간행물 정보: 『한국육종학회지』Vol.24 No.3, 268~275쪽, 전체 8쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 1992.09.30

영문 초록

The area of red pine forest stand damaged by pine gall midge insect has been wide spreading in the country. The damage causes a red pine tree to severe growth reduction and sometimes withering. To prevent the damage, it is needed to improve resistance of pinus densiflora to pine gall midge by introducing resistant factor. To see whether natural hybrid of P. densiflora and P. thunbergii founded in the area of coastal region in Kyungpook have fair resistance to the insect, the rate of growth reduction and gall forming on the needle were observed and the results were compared with those of parent species as follows. 1. The mean annual growth rates of ten year period before and after the year of 1983 were compared. That is, the comparison of mean annual growth rate of ten years period without and with pine gall midge damage, the growth reduction in P. densiflora was twice higher than P. thunbergii and their natural hybrid shows intermediate value of those parent species, i. e. the decrease of growth after attack to mean of annual growth of 10 years before attack in height and DBH was 70-80% and 40-70% in P. densiflora, 30-40% and 30-40% in P. thunbergii, 40-60% and 50-60% in hybrid, respectively. 2. Though P. densiflora has more needles containing pine gall midge eggs than P. thunberii by 15%, the rate of gall forming from them was 51.4% in P. densiflora and 21.5% in P. thunbergii. That is twice higher rate of gall forming in P. densiflora compare to P. thunbergii. 3. When the damage were classified into three grades, heavy, medium and light in mixed forest of two species, the value of above three grades were 32%, 67%, 1% in P. densiflora and 2%, 89%, 9% in P. thunbergii respectively.

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