SELECTED CONTENTS

 Journal of Applied Horticulture Selected Contents of Year

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Peter Jeranyama1, Jenna Sicuranza2, Harvey J.M. Hou3 and Carolyn DeMoranville1

1University of Massachusetts Amherst, Cranberry Experiment Station, 1 State Bog Rd, P.O. Box 569, East Wareham, MA 02538. 2Seed Savers Exchange, 3094 North Winn Road, Decorah, Iowa 52101. 3Alabama State University, Department of Physical Sciences, 915 S. Jackson St. Montgomery, AL 36104.

Key words: Yellow vine, cranberry, Vaccinium macrocarpon, stress, chlorophyll, gas exchange, nutrient

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 3-7.

Abstract: Yellow vine (YV) on cranberry (Vaccinium macrocarpon Ait.) is a symptom of stress that might reduce upright net photosynthetic carbon assimilation (A) through both, stomatal effects, which reduce the internal CO2 concentration (Ci), and nonstomatal factors. This study evaluated the shade effects on reversing the effects of YV symptoms in chlorophyll and nutrient content, and uprights gas exchange. Shaded vines were affected in the same way as unshaded yellow vines and their net photosynthetic carbon assimilation was not affected by stomatal activity in contrast with the normal green vines. However, A was not limited by stomatal activity ? 250 mmol m-2 s-1. Chlorophyll a concentration was positively correlated with A (r = 0.53 P? 0.05), shaded and YV had significantly lower total chlorophyll concentration relative to normal vines. Chlorophyll b was less affected by YV symptoms. Plant tissue were collected in autumn and analyzed for individual nutrient composition. Manganese levels were excessive in all samples; this was especially true for yellow vines, suggesting that the yellow vines may be under more water stress. Shading yellow vines did not change their nutrient composition relative to unshaded yellow vines. It is plausible that excess water on the bog is the major cause of the yellow vine as growers have a cultural practice of applying 25 mm of irrigation water a week regardless of the evaporative demand or field capacity.
Taycir Grati, Rachid Hellali, Salah Rezgui and Mehdi Ben Mimoun

NAT.43 Avenue Charles Nicole, City Mahrajene, 1082, Tunis, ISEP=BG 49 Avenue «13 Août  Choutrana II, 2036 Soukra. Tunisia

Key words: Citrus orchard, hedgerow orchard, radiation, high density planting, pruning, chlorophyll

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 8-14.

Abstract: The experiment consisted of hedging citrus trees of the variety “Washington Navel” with a planting density of 873 plants/ha. The hedge was 2.65 m high, 0.5 m wide on the upper part and 1.5 m on the lower part forming 10 degrees angle to the vertical and NE/SW orientation. The control tree was cut to a ball shape. Considering mean values of three years, hedging showed a high vegetative stretching (7.20 cm) while the control tree had a lengthening of 4.18 cm, with a growth rate of the spring shoots of 6.80 mm and 4.29 mm per day, respectively. As well, a larger spring leaf area was noted as compared to the control tree. This area was 366.55 cm2 against 124.22 cm2 by branch, respectively. In spite of a more severe pruning in the treatment, the fruit yield was near to that of the control (9.12 kg/tree) with a density of 873 trees/ha. No significant difference was noted for the total amount of chlorophyll between both sides of the hedge (South/East and North/West) for the non-bearing shoots (1.75 and 1.51 mg. g-1 fresh weight, respectively) and bearing ones (1.57 and 1.51 mg/g fresh weight) contrarily to the control (non-bearing shoots 1.2 and 1.57 mg g-1 fresh weight; bearing shoots 1.97 and 1.35 mg. g-1 fresh weight). All stages of maturation occurred earlier in the treatment.
Benyamin Lakitan1, Laily Ilman Widuri2, and Mei Meihana2,3

1College of Agriculture, Universitas Sriwijaya, Inderalaya 30662, Indonesia. 2Graduate School, Universitas Sriwijaya, Palembang 30139, Indonesia. 3STIPER Sriwigama, Palembang 30137, Indonesia.

Key words: Trifoliate leaf, leaflet, estimation model, growth analysis, leaf expansion

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 15-21.

Abstract: Non-destructive measurement of leaf area (LA) is preferred in growth analysis and plant physiological studies. Many regression-based models have been developed for estimating LA using leaf length (L), leaf width (W), or imaginary rectangle of L x W (LW) as predictor or independent variable. Objective of this study was to develop and validate appropriate regression models for estimating snap bean trifoliate LA using easily measured L, W, or calculated LW. Snap bean used in this research was PV072 cultivar. Trifoliate-leaf samples were purposively collected from different individual plants, to represent wide range of leaf sizes, from the smallest leaf with fully open blade to the largest available leaf. Snap bean trifoliate leaf consists of three leaflets. The sampled leaves were alternately divided into two subgroups, based on length of terminal leaflet, for developing and validating LA estimation models. Linear, quadratic, and power regressions were evaluated for their appropriateness to be used for estimating LA. Intercept (a) was forced to zero to make the models more geometrically realistic. Results of this research indicated that: (1) zero-intercept quadratic and power regression models performed well if length of leaflet (Lt) or width of leaflet (Wt) was used as predictor, whereas zero-intercept linear model was appropriate and geometrically-sound if imaginary rectangular Lt x Wt (LtWt) was used for estimating surface area of both terminal and side leaflets (LtA); (2) for a practical, fast, and accurate estimation of LA, LtWt of terminal leaflet was the recommended option among other single or combination of predictors; and (3) recommended empirical model for LA estimation of snap bean trifoliate leaf is LA = 1.5198 LtWt.
K. Ohta

Department of Agricultural and Forest Sciences, Shimane University, Matsue, Shimane 690-8504, Japan.

Key words: Flesh weight, fruit number, fruit weight, locular gel, Solanum lycopersicum

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 22-28.

Abstract: Changes in the incidence of fruit cracking, yield, number, and characteristics of cherry tomato (Solanum lycopersicum L.) in Japan over a 20-years period were investigated. Ten cultivars released in Japan during this period were compared in a short-term experiment conducted from fall through winter in hydroponics. The incidence of fruit cracking in cherry tomato cultivars decreased gradually with year of release from 1987-2009. The incidence of fruit cracking was negatively correlated with fruit yield and number among the 10 cultivars tested. With regard to fruit characteristics, the incidence of fruit cracking was negatively correlated with the fruit weight, the ratio of flesh weight to locular gel weight (F/G), and thickness of exocarp and mesocarp, but not with the flesh weight, soluble solid content or firmness of exocarp and mesocarp among the 10 cultivars tested. These results indicated that, by breeding in cherry tomato cultivars released in Japan over the past two decades, the decreased incidence of fruit cracking was related to the increase in the fruit yield and number per plant, and to the increase in fruit weight and F/G, in association with an increase in the total volume of water inflow into fruits.
A.N. Niyokuri1,2, S. Nyalala2 and Mariam Mwangi2

1College of Agriculture, Animal Sciences and Veterinary Medicine (CAVM), University of Rwanda. P.O. Box 210 Musanze, Rwanda. 2Department of Crops, Horticulture and Soils, Egerton University. P. O. Box 536-20115, Egerton, Kenya.

Key words: Bioslurry, carnation, plant biostimulant, vase life, flower quality, flower yield

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 29-34.

Abstract: Two greenhouse experiments were conducted in Finlays, Lemotit Flower Farm, Kenya to determine the effect of bioslurry and plant biostimulant Hicure® on yield, quality and vase life of carnation. The experiments were laid in split plot embedded in a randomized complete block design with three replications. Four levels of bioslurry: 0, 0.125, 0.25 and 0.5 L m-2 were applied in the main plot while four levels of Hicure®: 0, 2.0, 2.5 and 3.0 L ha-1 were used in the sub-plot. Results showed that bioslurry or plant biostimulant did not have a significant effect on carnation’s flower yield, weight, flower stem length and flower stem diameter. However, the interaction of bioslurry and plant biostimulant particularly at the rate of 0.5 L m-2 and 3 L ha-1 significantly improved the flower stem length by 1.11 cm as compared to control. The application of bioslurry significantly improved the flower head size in second trial from 21.09 mm in control to 21.68 mm, 21.81 mm and 21.90 mm for the carnation’s flower head diameter and from 40.34 mm in control to 40.96 mm, 40.97 mm and 40.88 mm for the carnation’s flower head length, respectively for the rate of 0.125, 0.25 and 0.5 L m-2. The flower head diameter was significantly improved from 22.12 mm in control to 22.32 mm, 22.30 mm and 22.40 mm by respective application of Hicure® at the rate of 2.0, 2.5 and 3.0 L ha-1 during first trial. Their interaction also improved the flower head length in second trial. Application of bioslurry had no significant effect on the vase life while plant biostimulant at the rates of 2.0, 2.5 and 3.0 L ha-1 significantly reduced the vase life by two days in first trial and one day in second trial. It was concluded that application of bioslurry at the rate of 0.5 L m-2 and plant biostimulant Hicure® at the rate 3 L ha-1 can therefore, be adopted for improvement of carnation quality parameters such as stem length and flower head size.
Amira Sh. Soliman1 and Nermeen T. Shanan2

1Natural Resources Department, Institute of African Research and Studies, Cairo University, Giza, Egypt. 2Ornamental Horticulture Department, Faculty of Agriculture, Cairo University, Giza, Egypt.

Key words: Lagerstroemia indica, foliar applications, Moringa leaves extract, sea salt stress, inflorescence characteristics, antioxidant enzymes

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 35-45.

Abstract: A pot experiment, conducted during 2014 and 2015 seasons in completely randomized factorial design to determine the effect of natural extracts, foliar spray of Moringa leaves extract (1:30), humic acid (10%), seaweed (2%), Hogland nutrient solution and tap water as control, on growth characteristics (plant height, stem diameter, number of leaves/plant, number of branches/plant, root length, and total dry weight of plant parts (roots, shoots and flowers), floral and chemical characteristics of Lagerstroemia indica grown at various sea salt concentrations (0, 3.12, 6.25 and, 9.37 dS/m) showed that by increasing sea salt concentrations, all growth characteristics, inflorescence number/plant and, inflorescence diameter decreased significantly, while, the number of days to inflorescence increased. Total chlorophylls, carotenoid contents, total carbohydrates and N, P, K%. Meanwhile, proline content, total soluble phenols, Na, Ca, and antioxidant enzymes (catalase, superoxide dismutase and peroxidase) increased at the high level of salinity (9.37 dS/m). The usage of the Moringa leaf extract significantly improved growth, inflorescence, as well as chemical characteristics, but also, decreased significantly Na under the adverse conditions of the studied sea salt stress. Moringa leaf extract could promote growth and protect crape myrtle plants against injuries by sea salt stress and being safe and cheap can substitute inorganic or chemical fertilizer.
Olusola O. AdeOluwa1, Olukemi Y. Akinkunmi2, Henry A. Akintoye2

1Department of Agronomy, Faculty of Science and Agriculture, University of Fort Hare, Private Bag X1314, Alice 5700, Alice, Eastern Cape, South Africa. 2Floriculture Improvement Programme, Vegetable / Floriculture Department, National Horticultural Research Institute (NIHORT), P.M.B. 5432, Ibadan, Nigeria

Key words: Agricultural waste, Anthurium andraeanum Lind., flowering, growth, potting media, production

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 46-50.

Abstract: Conventional vegetative propagation of flamingo flower (Anthurium andraeanum Lind.) is time consuming while commercial quantities can take years to develop. Hence, determination of a suitable and available potting media/ potting media mixes to provide solution to its propagation and flowering challenge is imperative. The growth response and sustainability of flamingo flower in different growth media were evaluated under nursery conditions between late planting season of 2011 (September) to early planting season of 2012 (February). Second planting was during the early planting season (June) to late planting season of 2012 (December) in the screen house of the National Horticultural Research Institute, Ibadan, Oyo State, Nigeria. Eight growth media viz. topsoil alone (TS) (control), topsoil + poultry manure (TSP) 3:1, sawdust + poultry manure (SP) 3:1, river sand + poultry manure (RSP) 3:1, coconut husk + poultry manure (CHP) 3:1, coconut coir + poultry manure (CcP) 3:1, maize cob + poultry manure (MCP) 3:1, oil palm empty fruit bunch + poultry manure (EFBP) 3:1 were tested. Suckers of Anthurium were planted in nursery bags arranged in a Completely Randomized Design with three (3) replicates in each planting year. Results indicated that growth media significantly affected the percentage of surviving plants. Sawdust + poultry manure (SP) (3:1) (93.33 %) was similar to those in coconut coir + poultry manure (CcP) (3:1) (80.00 %). Plants in the medium, coconut coir + poultry manure (CcP) (3:1) (7.33) were the better as compared to all the others in both planting years in terms of visual quality at 85 days after planting (85 DAP). Flower production in Anthurium was not significantly affected by growth media utilised in this study.
Smail Acila1,2, Mohamed Lakhdar Saker1, Mustapha Daddi Bouhoun1, Amani Taamalli3, Mohamed Didi Ould El Hadj1 and Mokhtar Zarrouk3

1Laboratoire de Protection des Ecosystèmes en Zones Arides et Semi Arides, Faculté de Sciences de la nature et de la vie, et des sciences de la terre et de l’univers, Université Kasdi Merbah, Ouargla, Algérie. 2Faculty of Life and Natural Sciences, University of Echahid Hamma Lakhdar, El Oued, Algeria. 3Laboratoire de Biotechnologie de l’Olivier (LBO), Centre de Biotechnologie, Technopole de Borj Cedria, Hammam-Lif, Tunisia.

Key words: Olive (Olea europaea L.), yield performance, pomological characteristics, field conditions, algerian desert

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 51-57.

Abstract: The present study was carried out during five successive seasons (2010 to 2014) on mature autochthonous olive (Olea europaea L.) cultivars namely: Azeradj, Chemlal, Neb djemel, Rougette and Sigoise grown under drip irrigation system in Dhaouia’s pilot farm in Oued Souf region in Algeria. Yield performance and pomological characteristics of these cultivars were studied. Results indicated that all of studied cultivars had acceptable olive production. Chemlal and Rougette recorded the highest cumulative yield over a five years period (306.6 and 294 kg/tree, respectively) whereas the lowest cumulative yield was from Neb djemel (243 kg/tree). Rougette had a remarkably alternate bearing index (0.18), whereas the other varieties showed a better stability in olive yields by a low alternate index (? 0.07). The largest fruit (6.86 g) were from Sigoise whereas Chemlal had the smallest fruit (1.76 g). Highest pulp fraction of total fruit weight (88.14%) was found in Sigoise, while the lowest (70.44%) was determined for Chemlal. Highest oil content in pulp dry weight was recorded in Rougette (36.31%) and Azeradj (32.35%), while the lowest values (20.14%) were recorded in Sigoise, Chemlal (27.71%) and Neb djemel (28.46%). Highest phenolic content in dry fruit pulp (23.56 mg GAE/g) was recorded in Sigoise whereas Azeradj had the lowest content (4.36 mg GAE/g). Based on these results, we recommend cultivating Sigoise and Neb djemel exclusively for table olive production in the Oued souf region, Rougette may be for dual purpose production, taking into account the economic feasibility for olive oil production in these desert areas.
C.K. Sunil, B. Kamalapreetha, J. Sharathchandra, K.S. Aravind and Ashish Rawson

Indian Institute of Crop Processing Technology, Thanjavur, Tamilnadu, India.

Key words: Ultrasound pre-treatment, microwave drying, okra, vacuum packing

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 58-62.

Abstract: The experiment was conducted to study drying kinetics of ultrasound assisted, microwave drying of okra and its effect on colour change, texture and rehydration properties of okra. The samples were dried in a continuous microwave dryer at 540 W power level and at a belt speed of 5 mm s-1. It was observed that ultrasound as pre-treatment led to significant reduction in drying time of okra. Page model was found to be the best to explain the drying behaviour of okra with high R2, lowest RMSE and X2. Ultrasound retained the colour properties of okra. The lowest total colour difference was recorded in ultrasound treated- 60 minutes sample (18.11) followed by the control dried sample (17.58). The textural properties of the treatments of ultrasound treated – 60 minutes and ultrasound treated-vacuum packed -30 minutes samples had the values of hardness, gumminess and chewiness closer to fresh okra values. The highest coefficient of rehydration was recorded in ultrasound treated- 60 minutes samples. The vacuum pack did not show any effect on the rehydration ratio. The rehydration ratio increased with increase in time from 30 to 60 minutes.
Eli Korlina1, Evy Latifah1 and Kuntoro Boga Andri2

1Assessment Institute for Agricultural Technology-East Java, Indonesian Agency for Agriculture Research and Development, Jl. Raya Karangploso KM. 4, Malang 65152- Indonesia. 2Assessment Institute for Agricultural Technology - Riau, Indonesian Agency for Agricultural Research and Development, Jl. Kaharuddin Nasution No. 341 Km 10, Pekanbaru - Indonesia.

Key words: Tomato, grafting, plant disease, rainy season, eggplant rootstock

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 63-66.

Abstract: was conducted at Kediri, East Java for studying the effect of grafted tomato on off season production (rainy season) of tomato. Experiment was laid out in factorial randomized block design with four treatment combinations viz., ungrafted (G0) and Grafted (EG 203 eggplant rootstock) (G1) and variety Timothy (V1) and CLN 3024 (V2) were studied for their main and interaction effect. The results indicated that grafting had highly significant effect on wilt disease incidence. There was interaction between grafted and variety for viral diseases and the yield (number of tomatoes). Grafed plants of cv Timothy had low virus attack with a higher yield (65 fruits per plant), compared to ungrafted plants (29 fruits per plant).
O. Rubtsova and V. Chizhankova

M.M. Grishko Botanical Garden, National Academy of Sciences, Ukraine, Timiryazevska Str.1, Kyiv-01014, Ukraine,

Key words: Rosa rugosa cultivars, morphological features, time of flowering, frost resistance

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 67-69.

Abstract: Frost can damage rose plant and affects its performance in field under subfreezing conditions. Under severe cold conditions of North of Ukraine, use of winter-hardy rose cultivars is a suitable alternative for successful rose cultivation. Evaluation of 21 cultivars derived from Rosa rugosa Thunb. showed morphological characteristics and considerable frost tolerance and required no winter protection for their cultivation. Owing to their advantages, cultivars ‘Abelzieds’, ‘Agnes’, ‘Conrad Ferdinand Meyer’, ‘Delicia’, ‘F.J. Grootendorst’, ‘Hansa’, ‘Henry Kelsey’, ‘Kaiserin des Nordes’, ‘Nova Zembla’, ‘Pink Grootendorst’, ‘Purple Roadrunner’, ‘Red Rugostar’, ‘Ritausma’, ‘Robusta’, ‘Rose a Parfum de l’Hay’, ‘Rotes Phanomen’, ‘Rugelda’, ‘Therese Bugnet’, ‘White Grootendorst’, ‘White Roadrunner’, ‘Yellow Dagmar Hastrup’ are recommended for planting in urban green areas of zone 5 climate of Ukraine.
R. Dhanalakshmi1, V. Vijaya Bhaskar2 and P. Subbaramamma3

1Department of Floriculture and Landscape Architecture, 3Department of Plant Physiology, HCRI, Dr. Y.S.R. Horticultural University,Venkataramannagudem-534101, West Godavari District, Andhra Pradesh. 2Department of Floriculture and Landscape Architecture, HCRI, Anantharajupeta-516105, Kadapa District, Andhra Pradesh.

Key words: Turf grass species, establishment, root length density, root mass density

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 70-74.

Abstract: The present investigation was aimed to evaluate the rooting characteristics of turf grass species planted with two different methods of establishment. A two factorial experiment with two methods of establishment and four turf grass species was laid out in a randomized block design replicated thrice during the year 2014-2015. The rooting characteristics, such as number of roots per stolon, root length and distribution, root diameter, root fresh weight (RFW), root dry weight (RDW), root length density (RLD) and root mass density (RMD) were studied during the course of investigation. The results showed that Bermuda grass planted with dibbling method of establishment recorded significantly higher number of roots, root length and distribution, RFW, RDW, RLD and RMD, whereas lowest rooting characteristics were exhibited by Korean grass planted with turf plastering method of establishment. The differences in RLD and RMD among different turf grass species observed to be related to the method of establishment adopted. Deep rooting species may have an advantage in absorbing the soil moisture from the deeper layers of the soil particularly during the water deficit periods thereby resulting in higher quality turf throughout the year.
Y.P. Sharma, K.K. Pramanick, J.S. Thakur, Santosh Watpade and Satish Kumar

IARI Regional Station (CHC), Amartara Cottage, Cart Road, Shimla-171004 (H.P.).

Key words: Malus, Pyrus, grain inoculum, rhizosphere, rooted sucker, differential reaction, white root rot, Dematophora necatrix

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 75-77.

Abstract: A screening technique for the identification of resistant germplasm of apple (Malus spp.) and pear (Pyrus spp.) to white root rot (Dematophora necatrix Hartig) was standardized under field conditions. Rooted suckers were planted in the field during late dormancy stage (February). These were challenge inoculated when plants had established in the field and attained new growth (during the month of July) by introducing fungus inoculum multiplied on wheat grain in the rhizosphere (50 grains/ sucker). Soil moisture was maintained at the field capacity. Different species exhibited differential reaction to disease development parameters viz., mycelial colonization of the infected plant parts, rate of wilting, defoliation, necrosis on the bark, wood and vascular region. Necrosis on the leaves was observed as first symptom of disease expression which took 10 days after the inoculation in susceptible species whereas incubation period was extended in resistant species. Most of the population of different susceptible host species collapsed within 30 days of inoculation. The mortality rate varied with species. The technique evolved is easy, quick, reliable and capable of creating required disease pressure under field conditions for screening rootstocks against white root rot disease.
S. Mahmood, M.M. Begum, N.N. Shati, M.H.T. Mondal and M.G. Hossain

Department of Horticulture, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh.

Key words: Postharvest, storage temperature, polyethylene bag, shelf-life, quality, Litchi chinensis

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 78-83.

Abstract: Effect of postharvest treatments on shelf-life and quality of litchi cvs. ‘Bombai’ and ‘Madraji’ were studied. Fruits of both the cultivars were stored in polyethylene bags, bamboo baskets with litchi leaf lining and open conditions at 5 °C and under ambient temperature for 9 days. In all the cases, fruits stored in open conditions lost weight rapidly and became unmarketable within 3 days due to rapid pericarp browning. In contrast, fruits kept in polyethylene bag had reduced weight loss and retained pericarp colour greatly during storage. Decay symptom was observed when the fruits were stored in ambient temperature either in polyethylene bags or in bamboo baskets with litchi leaf lining. However, no decay symptom was found in fruits kept at 5 °C irrespective of storage treatments. The changes in TSS, ascorbic acid and total phenolics in the aril were minimum in the treatment of polyethylene bags than that of bamboo baskets with litchi leaf lining and open conditions. Overall, fruits of both cultivars showed similar storage behavior and maintained better quality at 5 °C than ambient temperature.
Marcos R. da S Vieira1, Fabiana B. de Moura1, Adriano do N. Simões1, Angela V. de Souza2, Caio M. G. Santos3, Reinaldo de A. Paes4 and Ygor H. Leal1

1Department of Vegetable Production, Unidade Acadêmica de Serra Talhada, Universidade Federal Rural de Pernambuco, Serra Talhada-PE, Brazi. 2Associação Educacional do Vale da Jurumirim, Avaré-SP, Brazil. 3Instituto Federal de Pernambuco, Campus Zona Rural, Petrolina-PE, Brazil. 4Universidade Federal de Alagoas, Centro de Ciências Agrárias-CECA, Maceio, AL, Brazil.

Key words: Ornamental, floriculture, potted plants, ethylene, bioregulators, polyamines, boron, gerbera

Journal of Applied Horticulture, 2017, volume 19, issue 1, pages 84-88.

Abstract: Polyamines and boron spray were applied on gerbera to study their effect on the quality of flowers in potted plants of gerbera cv. ‘‘Kosak’’. The experiment was laid out in completely randomized design with six treatments (control, 0.8 mL-1 boron, 2 mMol L-1 putrescine (Put), 2 mMol L-1 spermine (Spm), 0.8 mL-1 boron + 2 mMol L-1 Put and 0.8 mL-1 boron + 2 mMol L-1 Spm) replicated six times. Gerberas (ligules and leaves) cv. ‘‘Kosak’’ were sprayed once with 100 mL of each concentration as treatment. In all the treatments, 1 mL/100 L-1 of a non-ionic surfactant was added to improve wetting and spray distribution. The results indicated significant effect of Put, Spm and boron on measured traits (P?0.05). Mean comparison showed that 2 mMol L-1 Spm produced the better quality potted gerberas. It was verified that polyamines and boron was effective to delay flower senescence of gerberas ‘‘Kosak’’. However, the combination of the two substances (0.8 mL-1 boron + 2 mMol L-1 Put and 0.8 mL-1 boron + 2 mMol L-1 Spm) had non significant effect on flower shelf life.

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