Effect of Loosening Agent Sprays on the Efficiency of the Mechanical Harvesting of ‘Arbequina’ Olives

The aim of this work was to evaluate the effect of ethephon (2-chloroethylphosponic acid), applied either alone or in combination with phosphorus compounds, on olive trees (Olea europaea L.) to improve the efficiency of mechanical harvesting. The trial was carried out in mature ‘Arbequina’ olive trees located in northeast Spain during the 2007 and 2008 olive crop seasons. In 2007, the olive trees were sprayed with 300 or 500 mg·L−1 of ethephon combined with two phosphoric formulations: monopotassium phosphate (MKP), at 15 g·L−1 or 30 g·L−1 and monoammonium phosphate at 15 g·L−1. In 2008 olive trees were sprayed with two ethephon concentrations (150 or 300 mg·L−1) in combination with 15 g·L−1 or 30 g·L−1 MKP or alone. Harvesting was performed with a commercial trunk shaker. Data were analyzed as a randomized complete block design with eight replications. Fruit removal force (FRF), ripeness index, fruit weight, natural drop, shaking efficiency (SE), leaf drop (LD), oil content, and bloom intensity of the next year’s bloom were measured. The trial treatments did not significantly affect ripeness index or oil content. Ethephon reduced FRF and increased shaking efficiency with significant differences. P compounds did not seem to affect FRF and LD. Small amounts of ethephon (150 mg·L−1) caused a large degree of fruit loosening (a 77% reduction in FRF at 11 days), which was sufficient to improve the efficiency of mechanical harvesting with minimal leaf drop.

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Preliminary Evaluation of Olive (Olea europaea L.) Cultivars in Northwest and Central of Mexico

Asian Journal of Agricultural and Horticultural Research ◽

10.9734/ajahr/2020/v7i330095 ◽

2020 ◽

pp. 10-17

Author(s):

Raúl Leonel Grijalva-Contreras ◽

Rubén Macías-Duarte ◽

Arturo López-Carvajal ◽

Fabián Robles-Contreras ◽

Manuel de Jesús Valenzuela-Ruiz

Keyword(s):

Central Region ◽

Oil Content ◽

Block Design ◽

Oil Quality ◽

Virgin Olive Oil ◽

Fruit Weight ◽

Yield Potential ◽

Preliminary Evaluation ◽

Olive Cultivars ◽

Northwest Region

A strategy to improve productivity in olive orchards is the evaluation of cultivars that respond better to the environmental growing conditions The objective of this experiment was to evaluate the yield potential and oil quality of five olive cultivars (Arbequina, Coratina, Manzanilla, Arbosana and Mission) in two regions of Mexico. The experiment was carried out during two consecutive years 2018 and 2019. At Northwest Region the five olive cultivars were planted in 2013 at a spacing of 10 x 5 m (having 200 trees ha-1) and Central Region olive cultivars were planted in 2013 at spacing of 6 x 6 m (278 trees ha-1) and both locations under drip irrigation systems. The variables evaluated were: yield, fruit weight, oil content and oil quality (acidity, peroxide value and absorbance K232 and K270). The experiment was analyzed using a randomized complete block design with four replications. Our results showed high differences between locations, Arbequina was the cultivar with the highest yield at the fifth and sixth years of planting with an average of 48.8 kg tree-1 at Northwest Region and only 15.5 kg tree-1 at Central Region. The cultivar with the highest oil content in the Northwest Region was Manzanilla with an average of 12.3% and the lowest for Arbequina with only 9.3%, while at Central Region the cultivar with the highest oil content was Coratina with 20.2% and the lowest in Manzanilla with 16.1%. Extra virgin olive oil was obtained in all the cultivars in both locations according to chemical analysis. Finally, it is necessary to continue with the evaluation of other varieties with resistance to high temperatures at Northwest Region and resistance to frost at Central Region.

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Salinity and nitrogen doses in the production and oil content of castor bean

Semina Ciências Agrárias ◽

10.5433/1679-0359.2019v40n6supl2p2851 ◽

2019 ◽

Vol 40 (6Supl2) ◽

pp. 2851

Author(s):

Allan Nunes Alves ◽

Hans Raj Gheyi ◽

José Amilton Santos Junior ◽

Fernando José da Silva Junior ◽

Frederico Antônio Loureiro Soares ◽

...

Keyword(s):

Electrical Conductivity ◽

Brackish Water ◽

Oil Content ◽

Ricinus Communis ◽

Block Design ◽

Fruit Weight ◽

Nitrogen Levels ◽

Randomized Block Design ◽

Ricinus Communis L ◽

Salinity Levels

The proper management of irrigation and mineral nutrition is critical to the success of crops, especially crops grown under salt stress conditions. The objective of this study was to evaluate the production and oil content of castor plants (Ricinus communis L.) irrigated with brackish water with different salinity levels (0.6, 1.6, 2.6, 3.6, and 4.6 dS m-1) and grown under different nitrogen levels (50, 75, 100, 125, and 150 mg of N kg-1 soil). These treatments were arranged in a completely randomized block design with a 5 ? 5 factorial scheme and three repetitions, totaling 75 experimental units. The interaction effect between salinity levels and nitrogen levels affected fruit weight per plant and oil content, and irrigation with brackish water with an electrical conductivity starting at 0.6 dS m-1 reduced the number of racemes per plant, number of fruits, and the weight of fruits and seeds.

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Ripening time and fruit characteristics of advanced olive selections for oil production

Australian Journal of Agricultural Research ◽

10.1071/ar07142 ◽

2008 ◽

Vol 59 (1) ◽

pp. 46 ◽

Cited By ~ 23

Author(s):

Raúl de la Rosa ◽

Lorenzo León ◽

Inmaculada Moreno ◽

Diego Barranco ◽

Luis Rallo

Keyword(s):

Field Trial ◽

Oil Content ◽

Weight Ratio ◽

Fruit Weight ◽

First Year ◽

Fruit Characteristics ◽

Fruit Removal ◽

Ripening Time ◽

Agronomic Evaluation ◽

Olive Cultivars

In the olive breeding program of Córdoba, Spain, the first 15 obtained selections have recently been tested in a comparative field trial, including their genitors, ‘Arbequina’, ‘Frantoio’ and ‘Picual’, as a control. In this work, we report the evaluation of the fruit characteristics and ripening time of those selections. Average data recorded in the comparative field trial orchard in two consecutive harvest seasons were used for statistical analysis. A high degree of variability and significant differences between genotypes were obtained for all the fruit characteristics analysed, and for ripening time and extractability index. For most of those parameters, selections showing better values than the genitors have been found. In particular, many of the selections had higher oil content than the genitors. Data for seedling plants evaluation was significantly correlated with data of the reported field trial for fruit weight, fruit removal force/fruit weight ratio and oil content. This indicates that selection in the seedling stage for these characters can be efficiently performed, even when only the first year of agronomic evaluation of the seedling is considered. On the contrary, seedling selection for fruit moisture, fruit removal force and ripening date seems to be difficult to perform. In summary, the results of the agronomic evaluation suggest that some of the selections could be released as new olive cultivars in the near future, for first time in Spain.

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Effect of Ethephon Spray Treatments on Mechanical Harvesting and Oil Composition of `Arbequina' Olives

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.120.4.558 ◽

1995 ◽

Vol 120 (4) ◽

pp. 558-561 ◽

Cited By ~ 3

Author(s):

J. Touss ◽

J. Lloveras ◽

A. Romero

Keyword(s):

Fatty Acid Composition ◽

Annual Variation ◽

Oil Quality ◽

Oil Composition ◽

Fresh Weight ◽

Fruit Removal ◽

Leaf Drop ◽

Harvesting Efficiency ◽

Olive Trees ◽

Fruit Oil

Ethephon was applied at 0, 625, 1250, 1875, and 2500 m·gliter-1 in 2 consecutive years to `Arbequina' olive trees to determine its effect on fruit removal with mechanical harvesting and on fruit oil composition. Ethephon increased the mechanical harvesting efficiency by 20%. Ethephon at 1250 and 1875 mg·liter-1 were the optimum treatments, resulting in 63% and 66% of the olives being mechanically harvested, respectively, with a preharvest olive drop of 10% and 11%. Leaf drop (4.6 and 4.8 kg/tree fresh weight, respectively) at these concentrations did not reduce flowering the following year. Oil acidity, peroxide value, and fatty acid composition were affected little by ethephon and the values observed were within the range of normal annual variation. These results suggest that ethephon did not modify oil quality and that its use on traditionally pruned `Arbequina' trees is not economically justifiable. Chemical name used: (2-chloroethyl)phosphonic acid (ethephon).

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Effect of Fertigation on the ‘Manzanilla de Sevilla’ Table Olive Quality Before and After “Spanish-style” Green Processing

HortScience ◽

10.21273/hortsci.43.1.153 ◽

2008 ◽

Vol 43 (1) ◽

pp. 153-158 ◽

Cited By ~ 11

Author(s):

A. Morales-Sillero ◽

R. Jiménez ◽

J.E. Fernández ◽

A. Troncoso ◽

L. Rejano

Keyword(s):

Block Design ◽

Fruit Weight ◽

Fruit Yield ◽

Irrigation Season ◽

Randomized Block Design ◽

Green Processing ◽

Before And After ◽

Table Olive ◽

Olive Trees ◽

Processing Differences

Table olive quality was analyzed in adult ‘Manzanilla de Sevilla’ olive trees subjected to different N–P–K fertigation treatments through five years (1999–2003). A randomized block design with four fertigation treatments was established: irrigated without fertilizer (control), and T200, T400, and T600 treatments, in which each tree was respectively fertigated with 200, 400, and 600 g N per irrigation season of a complex 4N–1P–3K fertilizer applied daily. Fruit yield and fruit physical characteristics and chemical composition were studied in 2002 and 2003. Fruit analysis realized in 2002 showed that the fruit pulp/stone ratio and water content increased with the amount of applied fertilizer. In 2003, a similar trend was found for fruit yield, weight, pulp/stone ratio, volume, longitudinal and transversal diameters, and fruit water and potassium concentrations. On the contrary, the concentration of reducing sugars; Ca, Na, and B; and the fruit texture decreased linearly with the fertilizer dose in 2003. No differences between treatments in fruit and stone shape, or stone volume or polyphenols concentration were found. On the other hand, the effect of the treatments on fruit browning damage was studied in 2003, as well as the fruit quality after “Spanish-style” green processing. In spite of the differences in fruit composition and texture, the fertigation treatments did not affect browning damage. After Spanish-style processing, differences between treatments in fruit weight and texture were again observed, but color, brown spots, and blistering incidence were not modified.

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The effects of date pollinizer variety and pollination time on fruit set and yield of Medjhol date palm

JOURNAL OF ADVANCES IN AGRICULTURE ◽

10.24297/jaa.v2i2.4246 ◽

2014 ◽

Vol 2 (2) ◽

pp. 67-71 ◽

Cited By ~ 3

Author(s):

Abdoul Amir Rahnama ◽

Esmaeil Rahkhodaei

Keyword(s):

Date Palm ◽

Fruit Set ◽

Block Design ◽

Male Flower ◽

Fruit Weight ◽

Palm Fruit ◽

Tropical Fruit ◽

Male And Female ◽

Time Interaction ◽

Female Flowers

Date palm is unisexual, being either male or female. Male and female flowers grow on buds called Spathe, which opens naturally when fully mature. It is easy to identify the male and female flowers. Under the method of manual pollination, pollen from a male flower is smeared over female flowers. The pollen variety and pollination time have important effects on date palm fruit set, yield and quality. This experiment was carried out to study the effect of date pollinizer variety and pollination time on fruit set, growth and development of Medjhol date palm variety, in date palm garden of date palm and tropical fruit research institute of Iran during three years from 2009 to 2011. The trail was randomized complete block design in factorial manner with three pollen variety as Ghaname, Vardy, and Samesmave, two pollination time as 1-3 days before or after spathe opening and four replication. The results showed that the Vardy pollen had significant effects and increased the fertility percent and fruit yield, rather than two other pollen varieties. The pollen variety had no significant effects on fruit quality as total sugar, acidity, and bricx. The pollination time before spathe opening significantly increased fertility percent, decreased fruit weight and date palm yield. Finally the pollen variety and pollination time interaction effects showed that, application of Vardy pollen from 1-3 days after spathe opening with the most production date palm yield, equal 19.9 kilogram per any date palm trees, so this treatment is the best and are recommended.

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ASSOCIATIONS BETWEEN TRAITS IN FISÁLIS: A TOOL FOR INDIRECT SELECTION OF SUPERIOR PLANTS

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452017106 ◽

2017 ◽

Vol 39 (4) ◽

Author(s):

NICOLE TREVISANI ◽

RITA CAROLINA DE MELO ◽

MAURO PORTO COLLI ◽

JEFFERSON LUÍS MEIRELLES COIMBRA ◽

ALTAMIR FREDERICO GUIDOLIN

Keyword(s):

Path Analysis ◽

Pearson Correlation ◽

Block Design ◽

Correlation Coefficients ◽

Indirect Selection ◽

Fruit Weight ◽

Physalis Peruviana ◽

Randomized Block Design ◽

Number Of Seeds ◽

Fruit Diameter

ABSTRACT Knowledge about associations between traits is fundamental for plant breeding, since indirect selection can accelerate the development of promising genotypes. This study assessed the magnitude of associations between agronomically important traits in fisális (Physalis peruviana L). The experiment was conducted in Lages, Santa Catarina, and the treatments consisted of six fisális populations. The experiment was arranged in a randomized block design, with two replications and seven plants per plot. The correlations between traits were estimated based on the Pearson correlation coefficients and partitioned into direct and indirect effects through path analysis. Fruit weight was positively correlated with number of seeds (0.874), equatorial fruit diameter (0.738) and polar fruit diameter (0.672). By path analysis, number of seeds was identified as the trait with the highest direct contribution to fruit weight. The high phenotypic correlations between the equatorial and polar fruit diameters with fruit weight were mainly due to the indirect effect via number of seeds (0.505 and 0.459). The selection for heavier fisális fruits was strongly influenced by number of seeds, i.e., this trait should be taken into account for selection.

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EARLY SPRING APPLICATION OF AMINOETHOXYVINILGLYCINE (AVG) INCREASES FRUIT SET AND YIELD OF ‘ROCHA’ PEARS

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452017982 ◽

2017 ◽

Vol 39 (4) ◽

Cited By ~ 3

Author(s):

MATEUS DA SILVEIRA PASA ◽

BRUNO CARRA ◽

CARINA PEREIRA DA SILVA ◽

MARLISE NARA CIOTTA ◽

ALBERTO FONTANELLA BRIGHENTI ◽

...

Keyword(s):

Fruit Quality ◽

Fruit Set ◽

Block Design ◽

Quality Attributes ◽

Fruit Weight ◽

Early Spring ◽

Full Bloom ◽

Growing Seasons ◽

Randomized Block Design ◽

Return Bloom

ABSTRACT The low fruit set is one of the main factors leading to poor yield of pear orchards in Brazil. Ethylene is associated with abscission of flowers and fruitlets. Then, the application of ethylene synthesis inhibitors, such as AVG, is a potential tool to increase fruit set of pears. The objective of this study was to evaluate the effect of AVG, sprayed at different rates and timings, on fruit set, yield and fruit quality of ‘Rocha’ pear. The study was performed in a commercial orchard located in the municipality of São Joaquim, SC, during the growing seasons of 2014/2015 and 2015/2016. Plant material consisted of ‘Rocha’ pear trees grafted on quince rootstock ‘BA29’. AVG was tested at different rates (60 mg L-1 and 80 mg L-1) and timings [full bloom, one week after full bloom (WAFB), and two WAFB), either alone or in combination. The experiment was arranged in a randomized block design, with at least five single-tree replications. The fruit set, number of fruit per tree, yield, estimated yield, fruit weight, return bloom, and fruit quality attributes were assessed. Fruit set and yield were consistently increased by single applications of AVG at 60 and 80 mg L-1 at both one and two weeks after full bloom, without negatively affecting fruit quality attributes and return bloom.

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Effect of Zinc and Boron on Growth and Yield of Okra (Abelmoschus esculentus L.)

Asian Journal of Advances in Agricultural Research ◽

10.9734/ajaar/2020/v12i130073 ◽

2020 ◽

pp. 41-47

Author(s):

Nusrat Jahan ◽

Md. Ashabul Hoque ◽

Md. Rasal-Monir ◽

Sumya Fatima ◽

Mohammad Nurul Islam ◽

...

Keyword(s):

Dry Matter ◽

Block Design ◽

Fruit Weight ◽

Fruit Yield ◽

Growth And Yield ◽

Area Index ◽

Spad Value ◽

Randomized Complete Block Design ◽

Number Of Leaves ◽

Fruit Diameter

The study was carried out to find out the effect of zinc (Zn) and boron (B) on growth and yield of okra (BARI Dherosh 1). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The treatments of the experiment were, T0 (without Zn or B), T1 (20 kg Zn ha-1), T2 (30 kg Zn ha-1), T3 (10 kg B ha-1), T4 (20 kg B ha-1), T5 (20 kg Zn ha-1 + 10 kg B ha-1), T6 (20 kg Zn ha-1 + 20 kg B ha-1), T7 (30 kg Zn ha-1 + 10 kg B ha-1) and T8 (30 kg Zn ha-1 + 20 kg B ha-1) were undertaken to evaluate the best results of the study. The highest plant height was found in T8 (30 kg Zn ha-1 + 20 kg B ha-1) but the highest number of leaves plant-1 was recorded from T7 (30 kg Zn ha-1 + 10 kg B ha-1). On the other hand, the maximum leaf area index, SPAD value, mean fruit weight, fruit length, fruit diameter, fruit dry matter (%), number of fruits plant-1, fresh fruit weight plant-1 , fruit yield plot-1 and fruit yield ha-1 were found in T7 (30 kg Zn ha-1 + 10 kg B ha-1), while the control (T0) showed lowest performance for the respected parameters. It is strongly concluded that 30 kg Zn ha-1 with 10 kg B ha-1 combination may be helpful for okra cultivation in the field level to increase okra production.

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Pengaruh Magnesium, Boron, dan Pupuk Hayati terhadap Produktivitas Cabai serta Serangan Hama dan Penyakit (Effect of Magnesium, Boron, and Biofertilizers on Chili Pepper Productivity and Impact of Pests and Diseases)

Jurnal Hortikultura ◽

10.21082/jhort.v30n1.2020.p65-74 ◽

2020 ◽

Vol 30 (1) ◽

pp. 65

Author(s):

Wiwin Setiawati ◽

Ahsol Hasyim ◽

Bagus Kukuh Udiarto ◽

Abdi Hudayya

Keyword(s):

Yield Components ◽

Growth Parameters ◽

Block Design ◽

Fruit Weight ◽

Chili Pepper ◽

Growth And Yield ◽

Vegetable Crops ◽

Positive Interaction ◽

Pests And Diseases ◽

The Impact

Penggunaan pupuk hayati dan unsur hara makro sekunder seperti magnesium (Mg) dan hara mikro boron (B) diketahui dapat meningkatkan pertumbuhan, kualitas hasil tanaman, meningkatkan unsur hara dalam tanah serta mampu meningkatkan ketahanan tanaman terhadap serangan hama dan penyakit. Selain itu penggunaan pupuk tersebut dapat mengurangi kebutuhan terhadap pupuk kimia sintetis. Tujuan penelitian adalah mengetahui pengaruh aplikasi Mg, B, dan kombinasinya dengan pupuk hayati terhadap pertumbuhan dan hasil panen serta penekanan serangan hama dan penyakit. Penelitian dilakukan di Kebun Percobaan Balai Penelitian Tanaman Sayuran, Lembang, Jawa Barat (1.250 m dpl.) dari bulan Juni 2018 sampai bulan Februari 2019. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok terdiri atas delapan perlakuan dan empat ulangan. Perlakuan yang diuji adalah aplikasi Mg, B, dan kombinasi dengan pupuk hayati serta teknologi konvensional sebagai pembanding. Pengamatan dilakukan terhadap pertumbuhan tanaman (tinggi tanaman dan luas kanopi), komponen hasil dan hasil serta serangan hama dan penyakit penting yang menyerang tanaman cabai. Hasil penelitian menunjukkan bahwa kombinasi Mg, B, dan pupuk hayati yang diaplikasikan sebanyak dua kali pada umur 30 HST dan 45 HST mampu meningkatkan produktivitas cabai sebesar 21,68 ton/ha atau meningkat sebesar 54,53% dibandingkan dengan kontrol. Peningkatan produktivitas cabai terjadi karena adanya perbaikan dalam komponen hasil seperti jumlah bunga, jumlah buah, panjang, dan bobot buah serta adanya penekanan terhadap serangan hama dan penyakit seperti trips, antraknosa, lalat buah, dan penggerek buah sebesar 18,10% sampai 23,93%.KeywordsCapsicum annuum; Unsur hara makro; Pupuk hayati; Produktivitas; Organisme pengganggu tumbuhanAbstractThe use of biofertilizer and macro and micro nutrients enhanced the growth and development, yield quality of vegetable crops as well as nutrient status of soil to a greater extent and to increased on pests and diseases resistance. Organic sources of nutrients including biofertilizers also economize the use of chemical fertilizers. The objectives of this study were to determine the best combination of Mg, B, and biofertilizer that increase the growth and yield of chili pepper and the impact to pest and diseases on chili pepper. The field experiment was conducted at the experimental field of the Indonesian Vegetable Research Institute, Lembang, West Java from June 2018 to February 2019. The experiment was arranged in a Randomized Block Design with eight treatments and four replicated. The treatments were Mg, B, and their combinations with biofertilizer compared to the conventional technologies as a control. The observations were carried out on the growth parameters (plant height and leaf canopy), yield components, pest and diseases of chili pepper. The results showed that the combinations of Mg, B, and biofertilizer increased the yield of chili up to 21.68 ton/ha or positive interaction beside beneficial agent with Mg, B, and biofertilizer package on 54.53%. Increased productivity of chili occurs because of improvements in yield components such as the number of flowers, number of fruits, fruit length and fruit weight and reduction of pest and disease attacks such as thrips, anthracnose, fruit flies and, fruit borers by 18.10% to 23.93%.

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