scholarly journals Prospective varieties of dahlia cultural (Dahlia x cultorum Thorsr. et Reis.) when growing for shearing in conditions of protected ground

2021 ◽  
pp. 47-51
Author(s):  
I. N. Voronchikhina ◽  
O. A. Shchuklina ◽  
V. V. Voronchikhin ◽  
A. D. Alenicheva ◽  
I. N. Klimenkova ◽  
...  

Relevance. In terms of the richness of colors, shapes and sizes of inflorescences and relative unpretentiousness during cultivation, as well as the duration of flowering of a dahlia, the cultural has no equal. Basically, this flower crop is grown in the open field and used for landscaping areas. Dahlias, due to their decorative properties, are a promising crop for cutting. But the growth in the volume of industrial cultivation of cut dahlias has long been constrained by two negative factors - the low life expectancy of cut flowers, and the fact that not all varieties of cultivated dahlias are suitable for cultivation in greenhouses. Therefore, the search for varieties that meet the aforementioned properties is an especially urgent task.Material and methods. The material for the study was 10 varieties of Dahlia × cultorum Dutch selection. They belong to different groups of dahlias – spherical: Souvenir d'Eté, The Voice, Jowey Winnie; decorative – Orion, Café au Lait, Fleurel, Karma Choc and pompom dahlias: Little William, Cornel Bronze, Petra's Wedding, All tubers were planted in phytotron beds. Phenological observations of plants were carried out according to the Methodology of State Variety Testing of Ornamental Crops. During the growing season, the following indicators were determined: the onset of phenological phases of development, the dynamics of plant growth, the number and size of inflorescences, the length of the peduncle, the duration of flowering.Results. It was found that all the studied varieties of cultural dahlias have a high decorative effect and are suitable for growing for cutting in greenhouse conditions. Growing plants in a phytotron allows you to get a high-quality cut almost two months ahead of time, as well as have a longer and more abundant flowering. It was found that the Café au Lait cultivar is not entirely suitable for cut cultivation in greenhouses or requires the development of cultivation technology that is individual for this cultivar. It was found that the Fleurel variety surpasses other studied varieties in terms of decorativeness, inflorescence size, peduncle length, onset time and flowering duration. A significant disadvantage of the variety is its high growth and fragility of the peduncles. The most popular cut varieties were Fleurel, Petra's Wedding, Jowey Winnie and Little William. It was found that the studied varieties of cultural dahlias were distinguished not only by high decorativeness, but also by high durability in a vase from 5 to 7 days.

2013 ◽  
Vol 1 (4) ◽  
pp. 253-257 ◽  
Author(s):  
Sailesh Ranjitkar

Mountainous terrain in East corner of Nepal is good location for phenological studies. Spring phenology in Rhododendron arboreum Sm. was monitored around Ghunsa river valley in Kanchenjunga Conservation Area of Nepal. Observations were carried our following the crown density method; flowering events of the selected species were recorded in 15-days interval. Flowering activity including duration of flowering and synchrony were determined. In addition, expected difference in flower onset time in two consecutive monitoring plots was determined. Elevation, latitude and longitude were regressed against flower onset to determine effect of each variable on flower onset. Delay in flower onset with rise in elevation, North latitude and West longitude was found in the results of the regression. Full bloom phase was found highly synchronized throughout the elevation gradient with contraction of flowering duration. High synchrony also indicates that the reproductive timing might plastic enough to cope with short-term change in environment. DOI: http://dx.doi.org/10.3126/ijasbt.v1i4.9154 Int J Appl Sci Biotechnol, Vol. 1(4): 253-257


2016 ◽  
Vol 7 (2) ◽  
pp. 67 ◽  
Author(s):  
K. Budiarto ◽  
Y. Sulyo ◽  
E. Dwi S.N. ◽  
R.H.M. Maaswinkel

Physiological status of chrysanthemum cuttings during rooting process highly influences plant growth and flower production. Amongst other aspects, rooting capacity of the cuttings is the most important. Rooting capacity is influenced by environmental conditions such as growing medium and nutrition. The study was aimed to analyze the effects of different types of media, fertilizer concentration, and frequency of fertilizer application on the rooting capacity of chrysanthemum cuttings. The experiment was conducted at the Segunung Experimental Station of the Indonesian Ornamental Crops Research Institute from February to May 2005. The treatments consisted of four different rooting media, i.e. carbonized rice husk, coco peat, perlite, and mixture of perlite and vermiculite (1:1 v/v); two concentrations of NPK (25:7:7) fertilizers, i.e. 1.75 and 2.5 g 1-l; and four frequencies of fertilizer application, i.e. every 1 day, 2 days, 3 days, and 4 days. The experiment was designed in a completely randomized block with four replications. Parameters observed were rooting capacity and cutting performances such as cutting height, cutting diameter, number of leaves, number of visible roots, and root length at 16 days after planting. The results showed that chrysanthemum cuttings rooted in carbonized rice husk had better performance than those rooted in coco peat, vermiculite, and mixture of perlite + vermiculite. Higher concentration of fertilizer solution up to 2.5 g l-1 also gave significant effect on the root formation and further root growth of cuttings. However, the rooting capacity of cuttings was not affected by the frequency of fertilizer application. This study implied that carbonized rice husk growing medium supplemented with NPK (2.5 g l-l) every 4 days during rooting period is the choice for traditional chrysanthemum growers to increase the perform-ance and quality of the cut flowers.


Plant Disease ◽  
2014 ◽  
Vol 98 (8) ◽  
pp. 1161-1161 ◽  
Author(s):  
E. Marys ◽  
A. Mejías ◽  
E. Rodríguez-Román ◽  
D. Avilán ◽  
T. Hurtado ◽  
...  

Gerbera (Gerbera jamesonii) and Chrysanthemum (family Asteraceae) are two of the top 10 cut flowers of the world, with great commercial value. Since 1998, Venezuela began a floral industry to produce and export fresh cut gerbera and chrysanthemum, with 40% of nurseries concentrated in Altos Mirandinos (Miranda State, north central region of the country). For the past 2 years, greenhouse-grown gerbera and chrysanthemum have been observed displaying symptoms resembling those associated with tospoviruses. Symptomatic plants showed concentric rings, irregular chlorotic blotches, and deformation on leaves. Disease incidence was estimated at 30%. Mechanical inoculation with extracts of symptomatic leaves reproduced the typical concentric ring symptoms on indicator plants Arachis hypogaea L. cv. San Martín, Capsicum chinense, and G. jamesonii 6 to 15 days after inoculation. In initial tests, leaves from each 30 symptomatic gerbera and chrysanthemum species from several greenhouse facilities in Altos Mirandinos reacted positively when tested by DAS-ELISA with polyclonal antisera (ATCC, Rockville, MD) raised against Tomato spotted wilt virus (TSWV). Total RNA was extracted with the RNeasy Plant Mini kit (QIAGEN, Hilden, Germany) from two gerbera and two chrysanthemum ELISA-positive samples. The TSWV coat protein gene was amplified by conventional reverse transcription (RT)-PCR using primers CP1 TSWV (TTAACTTACAGCTGCTTT) and CP2 TSWV (CAAAGCATATAAGAACTT) (1). A single DNA product of ~823 bp was amplified from all samples. RT-PCR products were directly sequenced in both orientations and sequences were deposited in GenBank (Accession Nos. KF146700 and KF146701 derived from chrysanthemum, KF146702 and KF146703 derived from gerbera). The resulting sequences showed over 99% identity with each other. and were found to be closely related (over 99%) with TSWV isolates deposited in GenBank originating from different hosts from France (FR693058, FR693055), Montenegro (GU339506, GU339508, GU355940), Italy (HQ830187), New Zealand (KC494501), South Korea (KC261967), and the United States (AY744476). To our knowledge, this is the first confirmed report of TSWV infecting gerbera and chrysanthemum in Venezuela. The relatively widespread occurrence of TSWV in Miranda State underscores the need for systematic surveys to assess its incidence and impact on ornamental crops so that appropriate management tactics can be developed. Reference: (1) R. A. Mumford et al. J. Virol. Methods 57:109, 1996.


2019 ◽  
pp. 184-195
Author(s):  
Hanna Pantsyreva

The present state of the trends of the use of annual flower-ornamental crops in the Podillya region is analyzed and their promise for landscaping of the park zone of VNAU is determined. The most promising species and varieties of the cultures of the Astra family (Asteraceae L.) were studied and investigated: Medicinal leeches (Calendula officinalis L.), Zinnia aqnustifollia H., Rootsters (Tagetes erecta L.) and Astra annalistic (Callistephus chinensis L.), – ecologically plastic plants, resistant to limiting environmental factors and with long decorative properties during the growing season. The most promising varieties of domestic selection for the creation of a collection of annual crops on the basis of the exhibition area of the Vinnytsia National Agrarian University are found: medicinal herbs (Sun of Egypt, Kabloon, Geisha), cynic of the narrow-leaved (Gloriencha, Sombrero, Classic), black-eyed peoples (Titan, Vavila, Robin Good), astera annually (Artistic, Yablunevo, Amethyst). By studying the dynamics of the flowering time of the studied varieties, it was found that the highest flowering duration (up to 60 days) was found in Tagetes erecta L. (52 days for the Titan variety, 60 days for the Vanilla variety, 55 days for Robin Good variety). Also, we have generalized recommendations on the use of different cultivars of the studied annuals of foreign selection in landscaping, taking into account their biomorphological features. It is established that from a practical point of view, they are promising for creating groups on the background of the lawn, micoborts, rabatok, flower beds and is an excellent material for the creation of monosads. It is the expansion of variants of simple and complex garden compositions with their participation will give the park area VNAU more decorative, the results of research will be used for the course of lectures and practical classes on the program of the specialty «Landscape management» for students of the Faculty of Agronomy and Forestry Vinnytsa National Agrarian University.


1974 ◽  
Vol 8 (2) ◽  
pp. 77-80
Author(s):  
J H G Waithaka

There is a large and increasing export business in outdoor vegetables and cut flowers which are sent by air from Kenya to Europe, the main products being capsicums and chillies, French beans, brinjals (aubergines), courgettes, carnations, okra and a wide range of vegetables grown specifically for Asians, particularly in the United Kingdom. Tropical flowers, Asparagus plumosus and rooted chrysanthemum cuttings are also exported. Cultural methods are briefly described in this article.


2020 ◽  
Vol 26 (1) ◽  
pp. 2143-2150
Author(s):  
M. R. Jahan ◽  
B. Shahanaz ◽  
M. M. Islam ◽  
M. Rakibuzzaman ◽  
A. F. M. Jamal Uddin

Breeders and Researchers need information for selecting and improving gerbera flower as promising cut flowers through flower color analysis. This experiment was accomplished to accurately define the different flower color cultivar and analysis of flower color of gerbera in the Horticulture farm of Sher-e-Bangla Agricultural University during the period of January, 2017 to June, 2017. Fourteen gerbera cultivars were used in this experiment arranged in Randomized Complete Block Design with three replications. The gerbera cultivars have been classified based on peduncle length and diameter, receptacle diameter, ray floret diameter, trans floret diameter, disc diameter, flower head type, disc color, flower shape, flower per plant and floret color following UPOV authorized guidelines. The color of the gerbera cultivars were definitely measured and expressed through L* (lightness), a* and b* (two Cartesian coordinates) including C* and hab (Chroma & Hue angle) based on CIELab scale. Classification and variation in petal color attributes presented in tables and plates that may be used for further research to improve the flower sector.


Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2280
Author(s):  
Rodica Vârban ◽  
Andreea Ona ◽  
Andrei Stoie ◽  
Dan Vârban ◽  
Ioana Crișan

Increasing interest in medicinal plants encourages the growers to consider extending their range of cultivated species. Acclimatization and adaptation of species introduced for cultivation in new areas remain a challenge of modern agriculture. One of the first steps for optimizing the cultivation technology is determining the plant phenology in the local conditions. Therefore, the aim of this research was to provide a standardized phenology scale for Agastache sp. and to apply it in assessing the suitability for cultivation in a local environment of some valuable Agastache species: Agastache scrophulariifolia, Agastache rugosa, Agastache mexicana, Agastache foeniculum and Agastache rugosa ‘After Eight’. During the vegetation period, nine growth stages were identified: germination/emergence, leaf development, formation of side shoots, stem elongation, inflorescence emergence, flowering, fruit development, fruit maturity, senescence and beginning of resting. Observations conducted over two years revealed that the vegetation period increased from 168.8 ± 3.51 days in the first year to 199.0 ± 1.82 days in the second year. In both vegetation periods, the flowering phenophase predominated, but the abundance of precipitations shortened the flowering duration in the second year. The duration of phenophases was highly influenced by growing degree days. Phenological assessment based on a standardized scale can be a useful tool for evaluating cultivation potential and the planning of technological resources.


2016 ◽  
Vol 7 (2) ◽  
pp. 67 ◽  
Author(s):  
K. Budiarto ◽  
Y. Sulyo ◽  
E. Dwi S.N. ◽  
R.H.M. Maaswinkel

Physiological status of chrysanthemum cuttings during rooting process highly influences plant growth and flower production. Amongst other aspects, rooting capacity of the cuttings is the most important. Rooting capacity is influenced by environmental conditions such as growing medium and nutrition. The study was aimed to analyze the effects of different types of media, fertilizer concentration, and frequency of fertilizer application on the rooting capacity of chrysanthemum cuttings. The experiment was conducted at the Segunung Experimental Station of the Indonesian Ornamental Crops Research Institute from February to May 2005. The treatments consisted of four different rooting media, i.e. carbonized rice husk, coco peat, perlite, and mixture of perlite and vermiculite (1:1 v/v); two concentrations of NPK (25:7:7) fertilizers, i.e. 1.75 and 2.5 g 1-l; and four frequencies of fertilizer application, i.e. every 1 day, 2 days, 3 days, and 4 days. The experiment was designed in a completely randomized block with four replications. Parameters observed were rooting capacity and cutting performances such as cutting height, cutting diameter, number of leaves, number of visible roots, and root length at 16 days after planting. The results showed that chrysanthemum cuttings rooted in carbonized rice husk had better performance than those rooted in coco peat, vermiculite, and mixture of perlite + vermiculite. Higher concentration of fertilizer solution up to 2.5 g l-1 also gave significant effect on the root formation and further root growth of cuttings. However, the rooting capacity of cuttings was not affected by the frequency of fertilizer application. This study implied that carbonized rice husk growing medium supplemented with NPK (2.5 g l-l) every 4 days during rooting period is the choice for traditional chrysanthemum growers to increase the perform-ance and quality of the cut flowers.


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