• Korean Journal Plant Pathology
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• v.12 no.3
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• pp.324-330
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• 1996

암수 딴그루인 참다래 품종 중에서 우리나라에서 재배되고 있는 대표적인 결실수(암나무)인 Hayward와 수분수(숫나무)인 Matua에서 궤양병의 발생 차이를 조사한 결과 Hayward의 이병엽율은 18.0%인 반면에 Matua의 이병엽율은 2.4%였다. 또한 Hayward와 Matua의 잎에 형성된 병반에서 분리된 궤양병균의 균총수는 생체중 1 g당 각각 1.8$\times$10\ulcorner개와 2.1$\times$10\ulcorner개로 Hayward에서 Matua보다 약 10배 가량 많은 궤양병균이 검출되었다. Hayward 신초에 존재하는 궤양병균의 밀도를 조사한 결과 줄기 조직보다는 잎 조직에서 많은 궤양병균이 검출되었으며 새로 나온 잎일수록 궤양병균의 밀도는 낮게 검출되었다. 궤양병 방제를 위하여 스트렙토마이신 수간주입에 의한 궤양병 치료효과는 50.7~53.7%였다. 수간주입시 약량을 주당 2 L에서 3 L와 4 L로 증가시킴에 따라 치료효과도 32.3%에서 58.1%와 71.0%로 각각 증대되었는데, 수간주입 약제와 수간주입 방법의 개선을 통하여 궤양병 치료효과를 더욱 증대시킬 수 있을 것으로 기대된다.

• Horticultural Science & Technology
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• v.34 no.5
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• pp.755-760
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• 2016

In general, the storage life of hardy kiwifruit (Actinidia arguta) is approximately one month, even in cold storage, which is a limiting factor for its commercialization due to the short marketing period. This short shelf life is in contrast to those of green kiwifruit (A. deliciosa, 6 to 8 months) and gold kiwifruit (A. chinensis, 4 to 6 months). To increase the storage life of hardy kiwifruit, we performed a cross between A. arguta (a local collection, 'Hy2-1', female) and A. deliciosa ('Matua', male) at Wando station at the Fruit Research Institute of JARES, Korea in 1999. After the first selection in 2006, we clonally propagated the hybrid plants by grafting them onto A. arguta seedlings in Gwangyang and Haenam province, Korea. We performed the final selection of this cultivar in 2012 and applied for plant protection rights from the Korea Forest Research Institute in 2013. Several experimental orchards have been established for commercial production. 'Mansu' begins to flower on May 20 in Gwangyang. The horticultural maturity date in 'Mansu', when the soluble solid content reaches $7^{\circ}Bx$, is October 15, whereas that of the control variety ('Chiak') is October 5. The average fruit size of 'Mansu' is approximately 15 g. The soluble solid content of 'Mansu' is approximately 16 to $17^{\circ}Bx$ after ripening. The total yield of mature 'Mansu' vines is estimated to be 2.2 to 2.5 tons per 10a. The fruit firmness of 'Mansu' exceeded 1.5 kg/5 mmØ until 70 days after storage (at 0 and $1^{\circ}C$). Therefore, 'Mansu' fruits have much longer storability than the control. The cultivation and production of 'Mansu' may extend the marketing period for hardy kiwifruit.

• Journal of Bio-Environment Control
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• v.23 no.3
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• pp.256-261
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• 2014

This study was carried out to determine the effect of the artificial pollination on fruit set, seed formation and fruit quality in kiwifruit and to confirm the effective pollination time for optimal fruit set in the shelter greenhouse cultivation. Also, the effect of artificial pollination practice by the pollen diluent solution was tested. By artificial pollination, fruit set, seed formation, and fruit quality was improved both in the open field condition and in the shelter greenhouse cultivation. In order to find the effective pollination period (EPP), artificial pollination was carried out every day until 7 days after full bloom. Number of seeds and fruit set rate and fruit growth of kiwifruit were no significantly different until 4 days after full bloom (DAFB), but, those of kiwifruit from 5 DAFB significantly decreased. Consequently, the effective pollination period of kiwifruit in the shelter greenhouse was 4 days after full bloom. Also, artificial pollination by the pollen diluent solution was showed the similar fruit set and fruit quality compare to that by lycopodium powder. Accordingly, artificial pollination by the pollen diluent solution should be very effective practice for labor saving in kiwifruit cultivation.