scholarly journals ANTHURIUM YIELD AND WEED CONTROL IN RESPONSE TO HERBICIDES AND WOVEN POLYPROPYLENE MULCH UNDER SHADEHOUSE CONDITIONS IN HAWAII.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 629g-630
Author(s):  
Joseph DeFrank ◽  
Tadashi Higaki ◽  
Joanne Imamura
Keyword(s):  
Weed Control ◽  
Yield Components ◽  
Flower Size ◽  
Stem Length ◽  
Control Treatment ◽  
Cut Flower ◽  
Flower Yield ◽  
Red Color ◽  
Herbicide Treatments ◽  
Cut Flower Yield

Yield components of 4 anthurium cultivars over a 2 year harvest period were determined. The varieties are `Ozaki' (red color-OZ), `Nitta' (orange-NT), `Kozohara' (dark red-KZ) and `Marian Seefurth' (pink-MS). The herbicide treatments are: diuron (1.1 kg ai/ha) every 3 months (DN); granular formulation of oxyfluorfen (2%) and oryzalin (1%) (3.4 kg ai/ha) in an alternating 3 month cycle with diuron (1.1 kg ai/ha) (OO). Black polypropylene mulch (PM) is the non-chemical control treatment. Yield components include: total cut flower yield, mean stem length and mean flower size (spathe width × length). Total flower yield was not significantly affected by weed control treatments. Yield ranking was: MS>KZ=NT>OZ. A significant interaction was recorded for stem length and flower size. OZ stem length was unaffected by weed control treatments while the others showed variations dependent on treatments. KZ and OZ flower size was not affected by weed control treatments, however, herbicide treatments did reduce flower size of MS and NT. Weed control ranking was: PM=00.>DI.

scholarly journals High-pressure Sodium Radiation during Off-peak Nighttimes Increases Cut Rose Production and Quality

HortScience ◽  
1996 ◽  
Vol 31 (6) ◽  
pp. 938-940
Author(s):  
Douglas A. Hopper
Keyword(s):  
High Pressure ◽  
Rosa Hybrida ◽  
Stem Length ◽  
Cut Flower ◽  
Fresh Weight ◽  
Flower Yield ◽  
Cut Flower Yield ◽  
One Year ◽  
Cut Rose

One-year-old plants of four cut rose (Rosa hybrida L.) cultivars were grown under either natural or supplemental irradiance for 4 months during the winter in Colorado. Supplemental irradiance with high-pressure sodium (HPS) lamps was supplied at 100 μmol·m–2·s–1 for 10 h each night during off-peak electrical use periods. Total cut flower yield, stem length, and fresh weight of individual flowers were recorded. The number of flowers produced and fresh weight increased for all cultivars under the supplemental irradiance treatment. Flower count, stem length, and fresh weight showed significant differences among the four 4-week production periods; production differences were promoted through pinches of two stems per plant to time for holiday peaks. When production was highest, stem length and fresh weight were lower, most likely due to redistribution of the limited carbohydrate pool during the winter.

scholarly journals Field Studies of Achilles as a Cut Flower: Longevity, Spacing, and Cultivar Response

1992 ◽  
Vol 117 (1) ◽  
pp. 65-67 ◽  
Author(s):  
A.M. Armitage
Keyword(s):  
Field Studies ◽  
Stem Diameter ◽  
Stem Length ◽  
First Year ◽  
Cut Flower ◽  
Flower Longevity ◽  
Yield And Quality ◽  
Flower Yield ◽  
Cut Flower Yield

Various species and selections of Achillea L. were grown for 2 to 5 years, depending on taxon, and evaluated for cut flower yield and quality. `Coronation Gold' yarrow (A. × `Coronation Gold') was productive for 5 years. Flower yield, average stem diameter, and stem length were smallest the first year, but no differences occurred between years 2 and 5. The highest percentage of stems > 50 cm long occurred on plants at the densest spacing. Yields were higher and stems longer for A. millefolium L. cultivars and A. ptarmica L. `The Pearl' in the second than the first year. A. millefolium `Kelwayi' and `Lilac Beauty' produced the highest yield while `Heidi' and `Sawa Sawa' produced the longest stems. Yields of all cultivars of Galaxy hybrids (A. taygetea Boiss. & Heldr. × A. millefolium) increased over 4 years of harvest. Stems were longer and flower diameters were larger after the 2nd year for all cultivars but `The Beacon'. `Salmon Beauty' had the highest yield, but yield of `Appleblossom' did not increase after year 2.

INHERITANCE OF FLOWERING TIME AND ITS APPLICATION FOR INDIRECT SELECTION IN THE DAVIS POPULATION OF GERBERA

HortScience ◽  
1990 ◽  
Vol 25 (11) ◽  
pp. 1357F-1358
Author(s):  
Yiran Yu ◽  
James Harding ◽  
Thomas Byrne
Keyword(s):  
Flowering Time ◽  
Genetic Correlations ◽  
Indirect Selection ◽  
Cut Flower ◽  
Narrow Sense ◽  
Narrow Sense Heritability ◽  
Components Of Variance ◽  
Genetic Components ◽  
Flower Yield ◽  
Cut Flower Yield

Genetic components of variance and heritability of flowering time were estimated for five generations of the Davis Populationof Gerbera hybrids, Composite, Estimates of narrow-sense heritability averaged 0.50 and broad-sense heritability averaged 0.77 using the NCII design. Narrow-sense heritability was also estimated with two models of parent-offspring regression, resulting in average heritability of 0.49 and 0.51. Estimates of components of variance indicated that the major genetic effect controlling flowering time is additive. However, the dominance component accounted for 28% of the total variance; the environmental component was only 23%. Flowering time is negatively correlated with cut-flower yield. The phenotypic coefficient was –0.34; genetic correlations were –0.47 when estimated from the NCII design, and –0.72 when estimated from the parent-off-spring method. A practical model was constructed to assess the efficiency of indirect selection for cut-flower yield using flowering time as a marker trait. The advantages of indirect selection accruing from increased population size and reduced generation time are discussed.

Cut Flower Yield and Quality Response to Cutting Height at Harvest of Rose ‘Yellow King’ in Hydroponic Culture

2015 ◽  
Vol 23 (2) ◽  
pp. 98-103
Author(s):  
Dong Chun An ◽  
◽  
Jin Gi Kim ◽  
Ju Chean Hwang ◽  
Young Don Chin ◽  
...  
Keyword(s):  
Hydroponic Culture ◽  
Cut Flower ◽  
Yield And Quality ◽  
Flower Yield ◽  
Cut Flower Yield ◽  
Quality Response ◽  
Cutting Height

Effects of inbreeding on cut-flower yield in gerbera

Euphytica ◽  
1995 ◽  
Vol 81 (2) ◽  
pp. 157-161 ◽  
Author(s):  
H. Huang ◽  
J. Harding ◽  
T. Byrne ◽  
T. Famula
Keyword(s):  
Cut Flower ◽  
Flower Yield ◽  
Cut Flower Yield

scholarly journals INHERITANCE OF FLOWERING TIME AND ITS APPLICATION FOR INDIRECT SELECTION IN THE DAVIS POPULATION OF GERBERA

HortScience ◽  
1990 ◽  
Vol 25 (11) ◽  
pp. 1357f-1358
Author(s):  
Yiran Yu ◽  
James Harding ◽  
Thomas Byrne
Keyword(s):  
Flowering Time ◽  
Genetic Correlations ◽  
Indirect Selection ◽  
Cut Flower ◽  
Narrow Sense ◽  
Narrow Sense Heritability ◽  
Components Of Variance ◽  
Genetic Components ◽  
Flower Yield ◽  
Cut Flower Yield

Genetic components of variance and heritability of flowering time were estimated for five generations of the Davis Populationof Gerbera hybrids, Composite, Estimates of narrow-sense heritability averaged 0.50 and broad-sense heritability averaged 0.77 using the NCII design. Narrow-sense heritability was also estimated with two models of parent-offspring regression, resulting in average heritability of 0.49 and 0.51. Estimates of components of variance indicated that the major genetic effect controlling flowering time is additive. However, the dominance component accounted for 28% of the total variance; the environmental component was only 23%. Flowering time is negatively correlated with cut-flower yield. The phenotypic coefficient was –0.34; genetic correlations were –0.47 when estimated from the NCII design, and –0.72 when estimated from the parent-off-spring method. A practical model was constructed to assess the efficiency of indirect selection for cut-flower yield using flowering time as a marker trait. The advantages of indirect selection accruing from increased population size and reduced generation time are discussed.

Cut Flower Yield and Quality of Cymbidium According to Different Cultivation Periods and Pot Sizes

2016 ◽  
Vol 24 (3) ◽  
pp. 212-216
Author(s):  
Hye Ryun An ◽  
◽  
Oh Keun Kwon ◽  
Pue Hee Park ◽  
Pil Man Park ◽  
...  
Keyword(s):  
Cut Flower ◽  
Yield And Quality ◽  
Flower Yield ◽  
Cut Flower Yield

Estimation of heritability and response to selection for cut-flower yield in gerbera

Euphytica ◽  
1981 ◽  
Vol 30 (2) ◽  
pp. 313-322 ◽  
Author(s):  
James Harding ◽  
Thomas G. Byrne ◽  
Robert L. Nelson
Keyword(s):  
Response To Selection ◽  
Cut Flower ◽  
Flower Yield ◽  
Selection For ◽  
Cut Flower Yield

scholarly journals Phytotoxicity and Weed Control Efficacy of Three Non-labeled Herbicides for Field-grown Hemerocallis spp.

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 745D-745
Author(s):  
Patricia R. Knight* ◽  
Christine E. Coker ◽  
Benedict Posadas ◽  
John M. Anderson
Keyword(s):  
Weed Control ◽  
Control Treatment ◽  
Separate Experiment ◽  
Control Efficacy ◽  
Random Design ◽  
Herbicide Treatment ◽  
Herbicide Treatments ◽  
Number Percentage ◽  
Field Production

The IR-4 program works to identify potential minor-use horticultural chemicals and evaluate them for phytotoxicity and efficacy. The objective of this experiment was to evaluate phytotoxicity and weed control of three unlabeled herbicides on field production of Hemerocallis spp. `Ming Toy'. Ten-cm pots of `Ming Toy' were planted into the field 16 July 2001. Each plot consisted of 3 plants per treatment with 6 replications in a completely random design. Each herbicide was analyzed as a separate experiment. Herbicide treatments consisted of clopyralid (0.14, 0.28, 0.56, or 1.1 kg·ha-1 a.i.), clethodim (125, 250, or 500 mL·L-1 a.i.), or bentazon (1.1, 2.2, or 4.4 kg·ha-1 a.i.). Data collected included weed number, percentage of weed coverage (% weed coverage), and phytotoxicity and foliar color ratings for `Ming Toy'. Clopyralid reduced total weed number 90 DAT although % weed coverage was similar or worse compared to the control treatment. Phytotoxicity 90 DAT was not significant for plants treated with clopyralid, but foliar color ratings were reduced. Application of clethodim to `Ming Toy' plots, regardless of rate, resulted in similar weed numbers compared to the control 49 DAT. Clethodim application, regardless of rate, reduced % weed coverage compared to the control treatment. Phytotoxicity 90 DAT was not significant, regardless of herbicide treatment, but foliar color ratings were lower for herbicide treated plants compared to the control. Bentazon, regardless of rate, reduced weed number and % weed coverage 49 DAT compared to the control. Phytotoxicity was similar to the control for plants treated with 1.1 kg·ha-1 a.i.

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