• Horticultural Science & Technology
• /
• v.29 no.2
• /
• pp.151-155
• /
• 2011

The fungus Botrytis cinerea causes fruit rot of strawberry and the damages can result in harvest losses upto 50%. Proper timing of fungicide application is essential for successful control of Botrytis fruit rot, fenhexamid plus iminoctadine tris, cyprodinil plus fludioxonil, fludioxonil alone, and Bacillus subtilis QST713 were applied to individual buds, flowers, and green and red fruit of cultivar 'Seolhyang' ex vivo. Cyprodinil plus fludioxonil or fludioxonil alone was applied i) before and after a 5-hr period of low-temperature ($0^{\circ}C$) incubation ex vivo ii) in field trials. Strawberry flowers and red fruit were more susceptible to B. cinerea than the green fruits. Incidence of Botrytis rot with fenhexamid plus iminoctadine tris and cyprodinil plus fludioxonil was the lowest at flowering, whereas B. subtilis QST713 did not significantly among treatments. In 2010, incidence of Botrytis fruit rot was significantly reduced when fludioxonil was applied two times at 1 week intervals from 50% bloom in field trials. Cultivars Redpearl and Seolhyang were more susceptible to low-temperature than cvs. Maehyang and Akihime. Cyprodinil plus fludioxonil application was effective when applied before onset of the low-temperature treatment period. Fludioxonil showed the most effective when it was sprayed one and more than two times in before and post low-temperature condition, respectively. These results demonstrate that fungicide selection and timing can interact with stage of fruit development and low-temperature in determining effectiveness of suppression of Botrytis fruit rot.

• Proceedings of the Korean Environmental Sciences Society Conference
• /
• 2007.05a
• /
• pp.470-473
• /
• 2007

기후 및 기온변동에 가장 민감하게 반응하는 것들 가운데 하나가 개화 등과 같은 생물계절현상이다. 이들 현상을 잘 관찰하고 연구함으로 인간이 느끼지 못하는 범위의 변화를 예측할 수 있다. 계절현상에 관한 연구는 일본 등과 같은 선진국에서는 활발히 이루어지고 있으며, 이와 같이 우리나라에서도 계절현상에 주목하여 지속적인 연구가 이루어져야 한다. 도시가 발달함에 따라 인구의 증가, 각종 산업의 발달, 교통량의 증가와 같은 인위적 요인으로 인하여 도시기후는 특유의 기후특성을 갖게 된다. 이러한 도시화로 인한 도시의 기후 변동이 벚꽃의 개화일에 어떻게 영향을 미치는지 그 경향을 통하여 알아보았다. 또한, 본 연구의 결과는 계절현상과 기온, 위도, 해발고도와의 상관관계를 파악하고, 모델링을 통한 생물계절현상을 예측하고 기후 변동의 검출 연구의 기초 자료로 활용 된다.

• Proceedings of the Korean Society for Bio-Environment Control Conference
• /
• 1998.10a
• /
• pp.103-106
• /
• 1998

카네이션에서 적심은 분지수를 늘려 종묘비를 절감하고 개화기를 조절하는데 많이 이용되고 있다. 적심횟수는 1회, 1.5회, 2회의 방법이 있으며 농가에서는 주로 1.5회를 이용하고 있다. 양액재배는 토경재배에 비해 생장속도가 빨라 개화가 빠른 것으로 일반적으로 알려져 있고 양액재배에 적합한 품종 역시 숙기가 빨라 2회 채화가 가능하거나 숙기가 늦은 품종, 절화장이 짧은 품종, 분지력이 좋은 품종이 유리한 것으로 알려지고 있다. (중략)

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.48 no.6
• /
• pp.442-446
• /
• 2003

The Gene action for eight quantitative characters related to the plant type was estimated using diallel cross among three different plant types of sesame (Sesamum indicum L.) in 2001. The parental varieties used for diallel cross were Ahnnam and Yangbaeck as indeterminate type, ksan22 as semi-determinate type, and dt-45 and Suwon131 as determinate type. In variance and covariance analysis (Wr-Vr) for eight characters the mean square of array except for capsule length, 1,000 seed weight were significant, which suggest that varieties involved in diallel set cross may have epitasis. Complete dominance was observed in the flowering periods, and ratio of matured grains while partial dominance was observed in the plant height, no. of capsules per plant, and no. of branch per plant. Broad sense heritability for flowering periods, plant height, no. of capsules per plant, and no. of branch per plant ranged from 0.91 to 0.99. Narrow sense heritability for flowering periods, capsule length, ratio of matured grain, 1,000 seed eight were 0.18 to 0.34, and plant height, no. of capsules per plant and no. of branch per plant were ranged 0.77 to 0.81.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2020.08a
• /
• pp.65-65
• /
• 2020

우리나라의 잇꽃 재배는 2010년 39ha 수준이 재배되다가 2014년에는 76ha 까지 확대되었으나 점차 감소하는 추세를 보이고 있으며 2018년에는 55ha가 재배되고 있는 것으로 보고되었고 주산지는 전라남도와 경상북도로 알려져 있다. 잇꽃(Carthamus tinctorius L.)은 국화과에 속하는 두해살이 초본 식물로 한자명은 홍화(紅花), 영명으로는 Safflower를 사용하고 있다. 우리나라에서 잇꽃 이용은 잇꽃 종실을 위주로 이용되고 있으나 일본의 경우 잇꽃의 경관적 가치를 활용하여 산형현(山形縣)에서는 홍화축제가 매년 개최되고 있으며, 미국 등에서는 잇꽃의 저온 압착유가 기능성 건강식품류로 판매되고 있다. 본 연구는 차광 조건에 따른 잇꽃의 개화특성 및 종자의 지방산 조성을 조사하여 일조시수가 짧은 준고랭지에서 잇꽃의 적응성을 평가하기 위해 수행되었다. 차광조건별로 개화기의 엽면적을 조사한 결과 30% 차광조건에서 9041.0mm²로 무차광에 비해 높아지는 양상을 보였고 50% 이상의 차광에서는 유의하게 낮아지는 경향을 나타냈다. 식물체의 초장은 50% 차광에서 낮아지는 양상이었으며, 주경의 착엽수는 30%와 70% 차광조건에서 18.3매/주 이상으로 증가되는 경향을 보였다. 화서별 착화수에서는 1차 화경 및 2차 화경 모두에서 30% 차광조건에서 착화수가 높은 경향을 나타냈으며 70% 차광조건에서는 2차화경 착화수가 유의하게 낮아지는 경향을 보였다. 차광 조건별로 잇꽃의 개화단계를 비교한 결과 동일한 조사시기에 무차광에서는 개화 3단계의 만개기까지 도달한 비율이 51.6%로 높았으나 50% 이상 차광에서는 11.1%로 낮아 개화가 지연되는 결과를 보였다. 차광조건에 따른 종자의 100립중은 무차광에서 4.9g의로 유의하게 높았으며 차광 비율이 높아질수록 낮아지는 양상이었고 단윔녀적당 종자 수량에서도 무차광이 201.1kg/10a를 보인 반면70% 차광에서는 86.6kg/10a의 낮은 수량을 보였다. 잇꽃 종자의지방산 조성에서 조지방 함량은 18.1~18.6% 범위로 차광조건에 따른 유의한 차이는 없었으며 palmitic acid의 함량은 무차광에서 5.35%로 높았으나, oleic acid의 함량은 30% 차광조건에서 10.2%로 무차광에 비해 높아지는 양상을 나타냈으며 linoleic acid는 50% 차광조건에서 83.6%로 가장 높은 비율을 보였다.

• Horticultural Science & Technology
• /
• v.19 no.4
• /
• pp.574-578
• /
• 2001

The effects of seed soaking (8 and 24 hours) and foliar spray of plant growth retardants (daminozide, chlormequat and uniconazole) on growth control in zinnia were investigated. For seed soaking of 'Dream Land Rose', the changes in plant height was not affected by seed soaking time (8 and 24 hours), while it was severely suppressed by high concentration of chemicals tested. An application of $125mg{\cdot}L^{-1}$ uniconazole was most effective for plant height suppression. Flowering was promoted by all treatments of chemicals. However, for 'Dream Land Scarlet', plant height control at 24 hours seed soaking showed more effective than 8 hours, and all treatments of chemicals decreased plant height. Uniconazole gave the best result for plant height control. Flowering tended to be hastened by the treatment of chemicals. For foliar spray, plant height was remarkably decreased at high concentration of uniconazole. Flowering was promoted by chlormequat and uniconazole in both 'Dream Land Rose' and 'Dream Land Scarlet'. Also, daminozide decreased number of petals.

• The Korean Journal of Applied Statistics
• /
• v.30 no.3
• /
• pp.417-426
• /
• 2017

It is important to predict the flowering dates of Japanese cherry and autumnal dates in Korea. Flowering date is decided by heating requirement with daily maximum and minimum temperature used to calculate the pre-determined heating requirements for flowering. Recent, changes in climate have impacted the flowering season of Japanese cherry in Korea. When compared with the current normal, the flowering of Japanese cherry is expected to be about 10 days earlier than in near future normal years. In this paper, we first consider a linear model based on meteorological data that predicts the flowering date and then incorporate a spatial structure into the model. Real data analysis indicates that the proposed approach provides more reasonable predicted dates.

• FLOWER RESEARCH JOURNAL
• /
• v.18 no.4
• /
• pp.295-298
• /
• 2010

A new spray chrysanthemum(Dendranthema grandiflorum) cultivar, 'Biz' was developed from a cross between 'S03-117' and 'Angaesoguk' by selection of seedlings and lines at the Flower Research Institute, Gyeongnam Agricultural Research and Extension Services(ARES) from 2003 to 2008. Its characteristics were investigated three times from 2006 to 2008 under condition of forcing culture in spring and retarding culture in autumn. The natural flowering time of 'Biz' was October 26th, and year-round production was possible by day length treatment. This cultivar was white in color, single in flower type for the spray type cut flower. Its capitulum was 3.0 cm in diameter, and had 15.6 head per stem in autumn. Its ray floret was green central zone. The days to flowering under the short day treatment is about 42 days in spring season, and 'Biz' showed the vase life of 24.1 days in autumn. This cultivar was registered for a commercialization in 2008.

• Korean Journal of Breeding Science
• /
• v.41 no.4
• /
• pp.529-533
• /
• 2009

A new spray chrysanthemum (Dendranthema grandiflorum) cultivar "Green Witch" was developed from a cross between 'S04161' and 'S04109' by selection of seedlings and lines at the Flower Research Institute, Gyeongnam Agricultural Research and Extension Services (ARES) from 2004 to 2008. Its characteristics were investigated three times from 2006 to 2008 under condition of forcing culture in spring and retarding culture in autumn. The natural flowering time of "Green Witch" was October 19th, and year-round production was possible by day length treatment. Its capitulum was 3.2cm in diameter, and had 15.9 head per stem in autumn. Its ray floret was green central zone. To flower in the short day condition, for "Green Witch" was about 44 days in spring, and "Green Witch" showed the vase life of 25.3 days in autumn. This cultivar was registered for a commercialization in 2008.

• FLOWER RESEARCH JOURNAL
• /
• v.18 no.1
• /
• pp.33-37
• /
• 2010

Effects of cutting time of double flowered Hydragea serrata for. acuminata native to Korea on flowering and growth of following year were investigated in order to develop as a pot plant. Cuttings were carried out every 10th day from April to September in 2008. The cuttings were directly placed in 15 cm diameter pots. Longest plant was obtained from May cuttings and their average heights were 31.7 cm, and followed by April and July cuttings. Plant heights of August and September cuttings were 23.6 cm and 22.0 cm, respectively. In contrast, growth and height of June cutting were abnormally small. Leaf length, leaf width and petiole length of August and September cutting were reduced, but numbers of leaves were not changed. Average flower cluster numbers of May cuttings were 4 flower clusters, and July, August and September cuttings were 3 clusters while only 1 flower cluster per a plant was obtained during June. Biggest diameter of flower crown was observed from May cuttings and the size was 10.3 cm diameter; however, smaller flower crown size was observed after July cuttings. The best overall flower appearance was observed from May cuttings, and the worst was June cuttings. Even though plant height of August and September cuttings were reduced, flowering aspect and ornamental value were normal, but blooming times were retarded according to late cutting time.