scholarly journals Phytotoxic Reaction of Hawaiian Cut Flowers and Foliage to Hydrogen Cyanide Fumigation

HortScience ◽  
1991 ◽  
Vol 26 (1) ◽  
pp. 53-56 ◽  
Author(s):  
James D. Hansen ◽  
Harvey T. Chan ◽  
Arnold H. Hara ◽  
Victoria L. Tenbrink
Keyword(s):  
Shelf Life ◽  
Hydrogen Cyanide ◽  
Plant Material ◽  
Cut Flowers ◽  
Treated Plant ◽  
Red Ginger

Phytotoxicity from hydrogen cyanide (HCN) fumigation was measured in several varieties of Hawaiian cut flowers and foliage (Zingiberaceae, Heliconia, Orchidaceae, Marantaceae, Lycopodiaceae, Agavaceae, Proteaceae) as a potential disinfestation treatment. Concentrations tested were 2500, 3700, 4600, and 5500 ppm HCN for 30 min. All foliage and most heliconia were undamaged at fumigation levels of 5500 ppm HCN; most protea and `Midori' anthuriums were uninjured at 4600 pm HCN; red and pink ginger were uninjured at 3700 ppm HCN; and all pincushion protea showed phytotoxicity to HCN. Red ginger was quickly damaged when exposed to sunlight immediately after treatment at 2500 ppm HCN. No injury was observed in simulated shipment tests of red ginger and `Ozaki' anthuriums fumigated at 2500 ppm HCN. Wet, red ginger flowers longer than 6 cm were damaged at 2500 ppm HCN, whereas shorter flowers were uninjured. Wet `Ozaki' anthuriums showed phytotoxicity only at 4600 ppm HCN. Wet, treated lycopodium and bamboo orchid foliage was not injured. The number of marketable days and shelf life of the treated plant material were estimated from the visual ratings.

scholarly journals Vapor Heat: A Potential Treatment to Disinfest Tropical Cut Flowers and Foliage

HortScience ◽  
1992 ◽  
Vol 27 (2) ◽  
pp. 139-143 ◽  
Author(s):  
James D. Hansen ◽  
Arnold H. Hara ◽  
Victoria L. Tenbrink
Keyword(s):  
Heat Treatment ◽  
Shelf Life ◽  
Plant Material ◽  
Life Stages ◽  
Potential Treatment ◽  
Cut Flowers ◽  
Treatment Modification ◽  
Treated Plant ◽  
Plant Injury ◽  
Red Ginger

Vapor heat treatments to disinfest tropical cut flowers and foliage were evaluated using a commercial facility. Efficacy was determined for specific durations against representative Hawaiian quarantine pests on their plant hosts. Nymphs and adults of aphids, soft and armored scales, mealybugs, and thrips were killed after 1 hour at 46.6C, and both life stages of aphids and armored scales along with mealybug nymphs after 2 hours at 45.2C. Injury to several varieties of Hawaiian floral commodities (Araceae, Musaceae, Zingiberaceae, Heliconiaceae, Orchidaceae, Marantaceae, Lycopodiaceae, Agavaceae, Proteaceae) during these treatments was determined. Large heliconias, most red ginger, bird-of-paradise flowers and leaves, and most foliage were not damaged; anthuriums, pincushion protea, and orchid flowers and foliage were very sensitive to vapor heat. Treatment modification was needed to reduce plant injury to these commodities without losing efficacy. The number of shelf-life days of the treated plant material was estimated from the visual ratings.

scholarly journals Identification of Xylem Occlusions Occurring in CutClematis(ClematisL., fam.RanunculaceaeJuss.) Stems during Their Vase Life

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Agata Jedrzejuk ◽  
Julia Rochala ◽  
Jacek Zakrzewski ◽  
Julita Rabiza-Świder
Keyword(s):  
Water Uptake ◽  
Plant Material ◽  
Microbial Growth ◽  
Vascular System ◽  
Vase Life ◽  
Cut Flower ◽  
Cut Flowers ◽  
Bacterial Development ◽  
Growth Formation ◽  
New Treatments

During the vase life of cut stems obstruction of xylem vessels occurs due to microbial growth, formation of tyloses, deposition of materials in the lumen of xylem vessels and the presence of air emboli in the vascular system. Such obstructions may restrict water uptake and its transport towards upwards thus lowering their ornamental value and longevity of cut flowers.Clematisis a very attractive plant material which may be used as cut flower in floral compositions. Nothing is known about the histochemical or cytological nature of xylem blockages occurring in cut stems of this plant. This study shows that inclematis, tyloses are the main source of occlusions, although bacteria and some amorphic substances may also appear inside the vessels. A preservative composed of 200 mg dm−38-HQC (8-hydroxyquinolin citrate) and 2% sucrose arrested bacterial development and the growth of tyloses. This information can be helpful in the development of new treatments to improve keeping qualities of cutclematisstems.

scholarly journals An Evaluation of Some Japanese Lisianthus (Eustoma grandiflorum) Varieties Grown in Bangladesh

2013 ◽  
Vol 11 (1) ◽  
pp. 56-60 ◽  
Author(s):  
AFM Jamal Uddin ◽  
MS Islam ◽  
H Mehraj ◽  
MZK Roni ◽  
S Shahrin
Keyword(s):  
Shelf Life ◽  
Normal Condition ◽  
Block Design ◽  
Pot Experiment ◽  
Cut Flowers ◽  
Eustoma Grandiflorum ◽  
Commercial Cultivation ◽  
Randomized Complete Block Design ◽  
Commercial Cultivars ◽  
First Time

A pot experiment was conducted for the first time in Bangladesh, at the Horticulture Farm of Sher-e- Bangla Agricultural University, Dhaka during November, 2010 to July, 2011 to asses the adaptability of seven lisianthus (Eustoma grandiflorum) cultivars namely Micky Rose, Pink Rose, Azuma No Yosooi, Purple Edge Glass, Piccolo Blue, Mellow Purple and Royal Violet for commercial cultivation in Bangladesh. The experiment was conducted in a Randomized Complete Block Design with nine replications. Significant differences among cultivars were noted for all the attributes evaluated. The highest number of flowers (16.0/plant) was produced by Piccolo Blue and the lowest from Pink Rose (7.0/plant). All the cultivars in this study showed very good shelf life (12.0-25.0days) in normal condition. All the seven lisianthus cultivars performed satisfactorily as ideal cut flowers. Further work may be done to develop these as commercial cultivars in Bangladesh. DOI: http://dx.doi.org/10.3329/agric.v11i1.15243 The Agriculturists 2013; 11(1) 56-60

scholarly journals POSTHARVEST TREATMENTS FOR PESTS OF TROPICAL CUT FLOWERS AND FOLIAGE

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 630b-630
Author(s):  
Arnold H. Hara ◽  
Trent Y. Hata ◽  
Victoria L. Tenbrink ◽  
Benjamin K.S. Hu ◽  
Mike A. Nagao
Keyword(s):  
Heat Treatment ◽  
Cut Flowers ◽  
Postharvest Treatment ◽  
Postharvest Treatments ◽  
Red Ginger

Postharvest treatments significantly reduced or eradicated pests on various tropical cut flowers and foliage. Immersion in water at 49° C for 10 minutes killed armored scales on bird of paradise leaves, Strelitzia reginae Banks, as well as aphids and mealybugs on red ginger, Alpinia purpurata (Vieill.) K. Schum. Vapor heat treatment for 2 hours at 45.2° C provided quarantine security against armored scales on bird of paradise leaves. A 5 minute dip in fluvalinate combined with insecticidal soap eliminated aphids and significantly reduced mealybugs on red ginger. A 3 minute dip in fluvalinate, a 3 minute dip in chlorpyrifos, or a 3 hour fog with avermectin-B significantly reduced thrips on orchids, Dendrobium spp., without injury to the flowers. No postharvest treatment was both effective and nonphytotoxic on all commodities.

Efficacy of Hydrogen Cyanide Fumigation as a Treatment for Pests of Hawaiian Cut Flowers and Foliage After Harvest

1991 ◽  
Vol 84 (2) ◽  
pp. 532-536 ◽  
Author(s):  
James D. Hansen ◽  
Arnold H. Hara ◽  
Harvey T. Chan ◽  
Victoria L. Tenbrink
Keyword(s):  
Hydrogen Cyanide ◽  
Cut Flowers

scholarly journals Effect of Gamma Radiation Dosages on Rooting of Pineapple Crown Sections, Shoot Emergence and Growth

1969 ◽  
Vol 54 (3) ◽  
pp. 551-558
Author(s):  
H. Irizarry ◽  
J. Vélez Fortuño
Keyword(s):  
Plant Material ◽  
Shoot Growth ◽  
Radiation Effect ◽  
Gamma Ray ◽  
Initial Stage ◽  
Bud Sprouting ◽  
Ability Groups ◽  
Pineapple Fruit ◽  
Treated Plant ◽  
Shoot Emergence

Longitudinal pineapple fruit crown sections were irradiated and studied for their rooting ability. Groups of 40 sections each were exposed to gamma-ray doses of 500, 750, 1,000, 1,500, 2,000, 2,500, 3,000, 4,000, 8,000, 16,000 and 32,000 rads in two separate experiments. The treated plant material was propagated, with checks, in sterilized soil in metal flats. The results indicate that at low doses of 500 to 4,000 rads no radiation effect was detected on the rooting of crown sections, proliferation of shoots and shoot stuntiness. Delayed germinal-bud sprouting was observed above 3,000 rads. Exposures to 8,000 and 16,000 rads reduced rooting of crown sections, retarded sprouting of germinal buds, reduced proliferation of shoots, and caused stuntiness in the initial stage of shoot growth. Exposure to 32,000 rads resulted in killing pineapple vegetative tissue. Pineapple appears to be highly resistant to this source of radiation.

scholarly journals Effect of Red Ginger Essential Oil (Zingiber officinale Var. Rubrum) Addition on Chitosan Based Edible Coating towards Organoleptic Characteristics Pempek

2021 ◽  
pp. 1-9
Author(s):  
Nabila Ayu Pratiwi ◽  
Iis Rostini ◽  
Ayi Yustiati ◽  
Rusky Intan Pratama
Keyword(s):  
Essential Oil ◽  
Moisture Content ◽  
Shelf Life ◽  
Zingiber Officinale ◽  
Fat Content ◽  
Edible Coating ◽  
Organoleptic Characteristics ◽  
Parametric Statistics ◽  
Red Ginger

This study aims to determine the best concentration of red ginger essential oil addition (Zingiber officinale var. Rubrum) edible coating to chitosan on the organoleptic quality of pempek. The research method was experimental which consisted of 5 treatments, namely control, addition of red ginger essential oil with concentrations of 0%, 0.5%, 1%, and 1.5% with 20 panelists as replicates. Parameters observed included organoleptic characteristics (appearance, texture, aroma, taste, tooth test, and folding test) based on the panelists' preference level using hedonic tests and chemical analysis (moisture content and fat content) and the shelf life of pempek. The data from the water content and fat content tests were analyzed descriptively, while the organoleptic test results were analyzed using non-parametric statistics with the test Friedman, if the test Friedman gave a rejection, multiple comparisons were performed and test was performed Bayes for decision making. The results showed that the best treatment in extending the shelf life of pempek was treatment D with the addition of 1% red ginger essential oil with a moisture content of 55.30% on the first day and 55.31% on the fourth day. While the fat content on the first day was 1.42% and on the fourth day it rose to 2.72% with the characteristics of appearance, texture, aroma, and taste still favored by the panelists.

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