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

Touss, J.; Lloveras, J.; Romero, Agustí

doi:10.21273/jashs.120.4.558

Cited by 10 publications

(13 citation statements)

References 7 publications

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“…The results of GA 3 treatments are similar to those obtained by other authors [11][12][13] who found that the GA 3 treatment slightly increased the average yield of date palm trees. The results of ethephon treatments also agree with those of researchers [2,15] who found that the application of ethephon had no significant effect on yield of olive and date palm trees, respectively.…”

Section: Effect Of the Growth Regulators On The Fruit Weightsupporting

confidence: 90%

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Effect of some growth regulators on some fruit characteristics and productivity of the Barhee date palm tree cultivar (Phoenix dactyliferaL.)

Aljuburi

Al-Masry

Al-Muhanna

2001

Fruits

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Effect of some growth regulators on some fruit characteristics and productivity of the Barhee date palm tree cultivar (Phoenix dactylifera L.).Abstract -Introduction. The date palm tree is one of the fruit trees most cultivated in the Arabian Gulf States. Bioregulators were used for the quality and productivity improvement of date palm tree fruits. A study was conducted to assess the relative effectiveness of GA 3 , NAA, ethephon and a mixture of growth regulators on some fruit characteristics and productivity of the Barhee date palm tree cultivar. Materials and methods. Five selected female uniform date palm trees of the cultivar Barhee were pollinated on March 5-15, 1994March 5-15, , 1995March 5-15, and 1996 placing eight fresh male strands on the female spadix center (flower cluster).Ten flower clusters were used on each tree and divided into five groups of two flower clusters. Each of these groups was subjected to one of the following treatments: control (water), 150 mg GA 3 × L -1 , 100 mg NAA × L -1 , 1 000 mg ethephon × L -1 and a mixture of these three growth regulators. Then the fruit setting, fruit flesh and dry matter percentages, the total soluble solids, the fruit ripening, and the fruit weight per bunch and per tree were measured. Results and discussion. The data showed that the application of GA 3 or ethephon on flower clusters of Barhee date palm trees had no constant effect on fruit characteristics and productivity of trees. NAA or growth regulator mixture applications on Barhee flower clusters reduced the fruit dry matter and fruit ripening percentages and increased the fruit weight per bunch and per tree. Conclusion. Treatments of Barhee date palm flower clusters, 20 d after pollination, with NAA or the specific growth regulator mixture decreased the dry matter percentage and the fruit ripening and increased the fruit flesh percentage and the date palm tree yield, therefore, these treatments could be recommended to improve the productivity of date palm trees in the region. Gulf States / Phoenix dactylifera / plant growth substances / spraying / nutrient improvement / crop yield Effet de quelques régulateurs de croissance sur certaines caractéristiques de production du cultivar Barhee de palmier dattier (Phoenix dactylifera L.).Effect of regulators on the Barhee date palm tree 325

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Section: Effect Of the Growth Regulators On The Fruit Weightsupporting

confidence: 90%

“…The past few years have witnessed significant advances in the use of synthetic and natural plant bioregulators for the improvement of crop performance in citrus [1,2], apple [2][3][4][5] and avocado [6]. Date palm trees (Phoenix dactylifera L.) are among the most cultivated horticultural crops in the United Arab Emirates.…”

Section: Introductionmentioning

confidence: 99%

Effect of some growth regulators on some fruit characteristics and productivity of the Barhee date palm tree cultivar (Phoenix dactyliferaL.)

Aljuburi

Al-Masry

Al-Muhanna

2001

Fruits

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“…Little has been published on the effect of abscission agent application relative to both FDF and harvest efficiency. Birger et al (2008) and Tous et al (1995) found a correlation between FDF and harvest efficiency in oil olives harvested at an advanced stage of ripening, but not in green table olives. Lavee et al (1982) showed that harvesting efficiency and leaf drop are varietysensitive, and Klein et al (1978) demonstrated the sensitivity of the system to irrigation practices and temperature.…”

Section: Discussionmentioning

confidence: 97%

“…High harvest efficiencies are reached when trunk shaking is accompanied by rod beating. The effect of abscission agents on harvest efficiency is negligible and in most cases inconsistent, and they can probably be omitted, especially when cost-benefit considerations are taken into account together with the potential damage from defoliation (Ben-Tal and Lavee, 1976;Tous et al, 1995).…”

Section: Discussionmentioning

confidence: 99%

Mechanical Harvesting of Table Olives: Harvest Efficiency and Fruit Quality

Zipori¹,

Dag²,

Tugendhaft³

et al. 2014

horts

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Table olives are traditionally harvested manually. However, a shortage of agricultural workers and high labor costs have prompted the search for mechanical solutions. Mechanical harvesting of four cultivars of green table olive—Manzanilla, Hojiblanca, Souri, and Nabali Mouhassan—was compared with manual picking in terms of harvest efficiency and final product quality. Mechanical harvest methods were: trunk shaking with and without simultaneous rod beating and with and without the application of an abscission agent. Olives were immersed in a diluted NaOH solution in the field, transported to the processing plant, and subjected to commercial procedures processing. Application of an abscission agent resulted in inconsistent fruit-detachment force values and did not affect harvest efficiency. Mechanical harvest with rod beating reached high harvest efficiencies of 80% to 95%, whereas the elimination of rod beating significantly reduced harvest efficiency. Final product quality of the mechanically harvested ‘Hojiblanca’, ‘Souri’. and ‘Nabali Mouhassan’ was similar to that of their manually picked counterparts, whereas that of cv. Manzanilla was inferior to those picked manually. High harvest efficiencies can be obtained using trunk shakers and simultaneous rod beating but final product quality of the mechanically harvested olives depends on variety. In some, mechanical harvesting can be used safely; in others such as cv. Manzanilla, further work is required to obtain a good-quality final product.

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“…The use of ethylene-releasing chemicals to increase removal rates of mechanical shakers has been widely studied in many countries and for many years (Lavee and Haskal, 1975;Martin et al, 1981;Tous et al, 1995;Vitagliano, 1975). However, removal efficiency in research trials using ethylenereleasing chemicals has been erratic (Martin et al, 1981), perhaps as a result of the variability in loosing product uptake and breakdown under natural conditions (Denney and Martin, 1994;Lavee and Haskal, 1975).…”

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confidence: 99%

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

Ninot¹,

Romero²,

Touš³

et al. 2012

horts

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

Cited by 10 publications

References 7 publications

Effect of some growth regulators on some fruit characteristics and productivity of the Barhee date palm tree cultivar (Phoenix dactyliferaL.)

Effect of some growth regulators on some fruit characteristics and productivity of the Barhee date palm tree cultivar (Phoenix dactyliferaL.)

Mechanical Harvesting of Table Olives: Harvest Efficiency and Fruit Quality

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

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