scholarly journals Performance of 'Emerald' and 'Jewel' blueberry cultivars under no-chill incidence

2018 ◽  
Vol 48 (2) ◽  
pp. 147-152 ◽  
Author(s):  
Ricardo Bordignon Medina ◽  
Tatiana Eugenia Cantuarias-Avilés ◽  
Sergio Figueiredo Angolini ◽  
Simone Rodrigues da Silva
Keyword(s):  
High Altitude ◽  
Northern Hemisphere ◽  
Vegetative Growth ◽  
Fruit Production ◽  
Commercial Production ◽  
Fresh Fruit ◽  
Limiting Factor ◽  
Subtropical Region ◽  
Southern States ◽  
Two Peaks

ABSTRACT Climate is a limiting factor for cultivating blueberries in new areas in Brazil, being the commercial production restricted only to the colder and high-altitude regions of the southern states. This study aimed to evaluate the performance of low-chill requirement 'Emerald' and 'Jewel' blueberry cultivars. For that, the stages of vegetative growth, sprouting, flowering fruiting and yield were assessed. The 'Emerald' cultivar has two peaks for both flowering and fruiting, with the main harvest period occurring between August and October, while the 'Jewel' cultivar shows two peaks for budding, but only one flowering peak and only one harvest, which extends from October through January. For both cultivars, the production occurs during the off-season of the internal and external markets, resulting in higher fruit prices. Growing both cultivars is feasible in a subtropical region with no-chill incidence, thus demonstrating that these cultivars have much lower chill requirements than those referred to in the literature, and favoring, this way, the fresh fruit production during the off-season of the main producing countries in the northern hemisphere.

scholarly journals The effect of using grafted seedlings on the yield and quality of tomatoes grown in greenhouses 

2018 ◽  
Vol 45 (No. 2) ◽  
pp. 76-82 ◽  
Author(s):  
Rodica Soare ◽  
Maria Dinu ◽  
Cristina Babeanu
Keyword(s):  
Fruit Quality ◽  
Vegetative Growth ◽  
Morphological Characteristics ◽  
Fruit Production ◽  
Soluble Solids ◽  
Average Weight ◽  
Appreciable Effect ◽  
Tomato Plants ◽  
Production Characteristics

This study was aimed at observing the effect of the grafting of tomato plants on morphological (vegetative growth), production and nutritive characteristics (quantity and quality of production). For this purpose, the ‘Lorely F1’ cultivar was used as a scion grafted onto the ‘Beaufort’ rootstock. Plants were cultivated with a stem and two stems. The observations collected in this study were concerned with the characteristics of plant growth. The studied morphological characteristics were plant height, stem diameter and number of leaves, and the studied production characteristics were the characteristics of fructification and productivity (the average number of fruit per plant, the average weight of the fruit, production per plant). Particular attention was paid to the nutritional characteristics of the fruit, to the fruit quality (total soluble solids, total sugar, acidity, vitamin C, antioxidant activity (by the Trolox method) and the contents of lycopene and beta-carotene). The results showed that grafting positively influenced the growth and production characteristics. Grafting of tomato plants had an appreciable effect on the vegetative growth of the variant 2-grafted tomatoes with a stem. The best option in terms of productivity and production was the variant 3-grafted tomatoes with two stems, which yielded 9.2 kg per plant. Fruit quality was not improved in any of the grafted variants. 

scholarly journals Fruit yield of strawberry stock plants after runner tip production by different cultivars

2013 ◽  
Vol 31 (3) ◽  
pp. 375-379 ◽  
Author(s):  
Miriane Dal Picio ◽  
Jerônimo Luiz Andriolo ◽  
Djeimi Isabel Jänisch ◽  
Odair José Schmitt ◽  
Maíne Alessandra Lerner
Keyword(s):  
Root Nodule ◽  
Cropping System ◽  
Fruit Production ◽  
Fragaria X Ananassa ◽  
Fruit Yield ◽  
Fresh Fruit

The main objective of this research was to determine fruit yield of strawberry (Fragaria x ananassa) stock plants in a cropping system after producing runner tips and plug plants. Micropropagated stock plants were planted in a soilless growing system. Runner tips bearing at least one visible root nodule were harvested at 43, 66 and 87 days after planting, rooted and planted as multiplied stock plants for producing plug plants. Treatments consisted of micropropagated stock plants of cultivars INIA Arazá, INIA Guenoa and INIA Yvapitá, planted on October 1st, 2008 (T1); multiplied stock plants planted on November 28th (T2) and on December 21st, 2008 (T3), and on January, 10th, 2009 (T4). On May 22nd, 2009, stock plants were defoliated and plug plants of the same cultivars were planted as control for fruit production. Early fruit yield and number of fruits were higher on stock plants, but fresh fruit yield was higher on control plants. Total fruit yield and number were higher on stock plants of 'INIA Arazá' and 'INIA Guenoa'. We concluded that strawberry stock plants reach higher early and total fresh fruit yield than plug transplants in the second cropping year after producing runner tips in a soilless growing system. Therefore, plants should not be discarded after the production of runner tips.

scholarly journals Cluster observations of a complex high-altitude cusp passage during highly variable IMF

2004 ◽  
Vol 22 (10) ◽  
pp. 3707-3719 ◽  
Author(s):  
M. G. G. T. Taylor ◽  
M. W. Dunlop ◽  
B. Lavraud ◽  
A. Vontrat-Reberac ◽  
C. J. Owen ◽  
...  
Keyword(s):  
High Altitude ◽  
Northern Hemisphere ◽  
Reasonable Agreement ◽  
Boundary Analysis ◽  
Excellent Opportunity ◽  
Cusp Region ◽  
Magnetic Signatures

Abstract. On 26 February 2001, the Cluster spacecraft were outbound over the Northern Hemisphere, at approximately 12:00 MLT, approaching the magnetosheath through the high-altitude (and exterior) cusp region. Due to macroscopic motions of the cusp, the spacecraft made multiple entries into the exterior cusp region before exiting into the magnetosheath, presenting an excellent opportunity to utilize the four spacecraft techniques available to the Cluster mission. We present and compare 2 methods of 4-spacecraft boundary analysis, one using PEACE data and one using FGM data. The comparison shows reasonable agreement between the techniques, as well as the expected "single spacecraft" plasma and magnetic signatures when associated with propagated IMF conditions. However, during periods of highly radial IMF (predominantly negative BX GSM), the 4-spacecraft boundary analysis reveals a dynamic and deformed cusp morphology.

A cincturing experiment on the sultana.

1961 ◽  
Vol 1 (3) ◽  
pp. 130
Author(s):  
AJ Antcliff
Keyword(s):  
Fruit Production ◽  
Fresh Fruit ◽  
Initial Increase ◽  
Berry Size ◽  
Dried Fruit

An experiment is described on sultana vines in which single or double cut cincturing every year for seven years, and double cut cincturing in years of low fruitfulness only, were compared with no treatment. The yield of vines cinctured every year did not decrease progressively after an initial increase, as was previously supposed, but appeared to reach equilibrium at a lower level than for untreated vines. An initial increase in berry size due for treatment gradually disappeared in later seasons as the treatment was continued. An increase in yield on vines cinctured in one season only was more than offset by a decrease in the following year. It is concluded that even occasional cincturing is not likely to be useful for dried fruit production, and that for fresh fruit production the desired increase in berry sire will be obtained only if different vines are cinctured in successive seasons.

scholarly journals Strawberries at the Crossroads: Management of Soilborne Diseases in California Without Methyl Bromide

2020 ◽  
Vol 110 (5) ◽  
pp. 956-968 ◽  
Author(s):  
Gerald J. Holmes ◽  
Seyed Mojtaba Mansouripour ◽  
Shashika S. Hewavitharana
Keyword(s):  
Methyl Bromide ◽  
Fruit Production ◽  
Limiting Factor ◽  
Strawberry Fruit ◽  
Breeding Programs ◽  
Soilborne Diseases ◽  
Strawberry Industry ◽  
Phase Out ◽  
Strawberry Breeding ◽  
The Impact

Strawberry production has historically been affected by soilborne diseases such as Verticillium wilt. This disease was a major limiting factor in strawberry production in California in the 1950s and was the main reason that preplant soil fumigation with methyl bromide (MB) was developed in the late 1950s. MB fumigation was so successful that over 90% of the commercial strawberry fruit production in California utilized this technique. However, MB was subsequently linked to ozone depletion, and its use was phased out in 2005. The California strawberry industry was awarded exemption to the full phase-out until 2016, when all MB use in strawberry fruit production was prohibited. MB use continues in strawberry nurseries under an exemption to prevent spread of nematodes and diseases on planting stock. This review examines the impact of the MB phase-out on the California strawberry industry and evaluates the outlook for the industry in the absence of one of the most effective tools for managing soilborne diseases. New soilborne diseases have emerged, and historically important soilborne diseases have reemerged. Registration of new fumigants has been difficult and replacement of MB with a new and effective alternative is unlikely in the foreseeable future. Thus, crop losses due to soilborne diseases are likely to increase. Host plant resistance to soilborne diseases has become a top priority for strawberry breeding programs, and cultivars are increasingly selected for their resistance to soilborne diseases. The intelligent integration of a variety of management tactics is necessary to sustain strawberry production in California.

Defoliation and growth, flowering, and production treatments in soursop trees

1969 ◽  
Vol 73 (2) ◽  
pp. 141-148
Author(s):  
Juan G. Cruz-Castillo ◽  
Arturo Cedeño-Maldonado
Keyword(s):  
Potassium Iodide ◽  
Fruit Production ◽  
Fruit Weight ◽  
Commercial Production ◽  
Flower Number ◽  
Tropical America ◽  
Lateral Branches

Interest in commercial production of soursop has increased recently in several countries of Tropical America. The work presented here deals with some aspects of the practice of defoliation and its relation to flowering and fruit production of soursop. Treatments used to evaluate defoliation were 1) control; 2) defoliation by hand; 3) potassium iodide at 1.5%; 4) Ethrel at 1500 mg/1; and 5) Ethrel at 2,000 mg/1. The sum of the growth of new lateral branches was significantly superior in all treatments compared to that of the control, with approximately 100 cm of new growth 9 months after treatment. Defoliation by hand and with Ethrel at 1500 and 200 mg/1 shifted formation of new flowers toward the region near the apex of branches. Total flower number 9 months after treatment was statistically superior in the treatments of defoliation by hand and by 1,500 mg/1 Ethrel, with 362 and 370 flowers, respectively. Total fruit production per year was significantly greater in the 1.5% potassium iodide treatment with 21 fruits/trees and a fruit weight at 15.27 kg.

Nitrogen supply controls vegetative growth, biomass and nitrogen allocation for grapevine (cv. Shiraz) grown in pots

2015 ◽  
Vol 42 (1) ◽  
pp. 105 ◽  
Author(s):  
Aurélie Metay ◽  
Jessica Magnier ◽  
Nicolas Guilpart ◽  
Angélique Christophe
Keyword(s):  
Vegetative Growth ◽  
Limiting Factor ◽  
Dependent Manner ◽  
Leaf Emergence ◽  
N Supply ◽  
Secondary Axis ◽  
Axis Elongation ◽  
Primary Axis ◽  
N Deficiency ◽  
Area Expansion

Maintaining grapevine productivity with limited inputs is crucial in Mediterranean areas. Apart from water, nitrogen (N) is also an important limiting factor in grape growing. The effects of N deficiency on grapevine growth were investigated in this study. Two-year-old Vitis vinifera L.cv. Shiraz plants grafted on 110 R were grown in pots placed outside and exposed to various N supplies (0, 0.6, 1.2, 2.4 and 12 g plant–1) under well-watered conditions. At veraison, plants were harvested and organs separately dried, weighed and analysed for N. During plant growth, the length of the primary and secondary axes and the number of leaves on them were recorded. The N content of leaves was also analysed at three phenological stages (flowering, bunch closure and veraison). All growth processes were inhibited by N deficiency in an intensity-dependent manner. Quantitative relationships with N supply were established. Vegetative growth responded negatively to N stress when comparing control N supply with no N supply: primary axis elongation (–61%), leaf emergence on the primary axis (–47%), leaf emergence on the secondary axis (–94%) and lamina area expansion (–45%). Significant differences on the plant N status were observed from flowering onwards which might be useful for managing fertilisation.

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