Skip to content
Research Article Open access CC BY 4.0

Effects of Plant Growth Regulators Including Micro-nutrients on Fruit Set and Yield of Mandarin in Dhankuta District of Nepal

Amar Bahadur Pun, Arjun Kumar Shrestha, Kalyani Mishra Tripathi, Dilli Ram Baral

Asian Journal of Agricultural and Horticultural Research · pp. 65–73 · Published 22 Mar 2023

10.9734/ajahr/2023/v10i3232

Abstract

The study evaluated foliar applications of three plant growth regulators, viz. GA3 @ 20ppm; 2,4-D @ 15ppm; and NAA @ 50ppm; alone and their combinations including three plant micro-nutrients, viz. B @ 0.4% + Zn @ 0.2% + Ca @ 1% in order to determine the best foliar spray of growth hormones and plant nutrients for the increased fruit set and yield of mandarin. The foliar sprays were applied five times, started from full-bloom until late September (pre-harvest stage). The experiments were conducted in Dhankuta, Nepal during 2019 and 2020. The highest bloom fruit set of 6.1% was recorded at the foliar application of GA3 20ppm + NAA @ 50ppm, compared to the control treatment of 4.6%.    Likewise, there were significant effects of plant growth regulations and micro-nutrients applications on the fruit drops across the fruit growing periods. The foliar application of GA3 + 2,4-D + micronutrients resulted in the lowest fruit drop during the months of June (63.9%), July (65.9%), and September (20.8%), as opposed to the control treatment's fruit drops of 77.6, 80.4, and 41.5%. In addition, the fruit drops occurred at the foliar sprays of GA3 + 2,4-D were statistically at par with the GA3 + 2,4-D + micro-nutrients. Also, the GA3 + 2,4-D + micronutrient spray treatment had the largest number of fruits (995 nos.) and total fruit weight (64.2 kg) per tree, which were considerably higher than the control by 201.5 and 175.5%, respectively. To sum up, a combined foliar application of gibberellic acid, 2,4-D and micro-nutrients is recommended for improving the fruit set, retention and yield of mandarin.

Fruitlets fruit set plant growth regulators plant micro-nutrients mandarin

References (29)

  1. 1 Statistical Procedures for Agricultural Research. [DOI]
  2. 2 The Mineral Nutrition of Higher Plants. [DOI]
  3. 3 Fruits: A Developmental Perspective [DOI]
  4. 4 Physiology of citrus fruiting [DOI]
  5. 5 Horticultural Statistics at a Glance 2015
  6. 6 Gibberellin reactivates and maintains ovary-wall cell division causing fruit set in parthenocarpic Citrus species [DOI]
  7. 7 Interactive effects of CO2 concentration elevation and nitrogen fertilization on water and nitrogen use efficiency of tomato grown under reduced irrigation regimes [DOI]
  8. 8 Herbicide Handbook of the Weed Science Society of America
  9. 9 Molecular Physiology of Development and Quality of Citrus [DOI]
  10. 10 Pollination Increases Gibberellin Levels in Developing Ovaries of Seeded Varieties of Citrus [DOI]
  11. 11 Auxin Flow in Anther Filaments is Critical for Pollen Grain Development through Regulating Pollen Mitosis [DOI]
  12. 12 Effect of Foliar Application of Micronutrients on the Yield and Quality of Sweet Orange (Citrus sinensis L.) [DOI]
  13. 13 Carbohydrate and ethylene levels related to fruitlet drop through abscission zone A in citrus [DOI]
  14. 14 Spring application of growth regulators affects fruit quality of `Blood Red' sweet orange
  15. 15 Plant Response to Boron Deficiency and Boron Use Efficiency in Crop Plants [DOI]
  16. 16 EFFECT OF FOLIAR SPRAY OF ZINC SULPHATE AND CALCIUM CARBONATE ON FRUIT QUALITY OF KINNOW MANDARIN (Citrus reticulata BLANCO) [DOI]
  17. 17 HORMONAL REGULATION OF FRUIT SET AND ABSCISSION IN CITRUS: CLASSICAL CONCEPTS AND NEW EVIDENCE [DOI]
  18. 18 The role of leaves in citrus fruitlet abscission: Effects on endogenous gibberellin levels and carbohydrate content [DOI]
  19. 19 Roots are important sources of carbohydrates during flowering and fruiting in ‘Valencia’ sweet orange trees with varying fruit load [DOI]
  20. 20 Growth Regulators, Fruit Drop, Yield, and Quality of Navel Orange in Florida [DOI]
  21. 21 Production cost and market analysis of mandarin in Dhading District of Nepal [DOI]
  22. 22 Nitrogen in Citrus: Signal, Nutrient, and Use Efficiency [DOI]
  23. 23 Gibberellic acid and fruit set in sweet orange [DOI]
  24. 24 Factors Associated with Excessive Fruit Drop of Navel Orange1 [DOI]
  25. 25 Management of foliar fertilization
  26. 26 Zinc nutrition and citrus decline – A review
  27. 27 EFFECTS OF CONCENTRATION AND APPLICATION TIME OF GA3 AND UREA ON YIELD, FRUIT SIZE DISTRIBUTION AND CROP VALUE OF CLEMENTINE MANDARIN IN CALIFORNIA [DOI]
  28. 28 Management of Citrus Decline and Rejuvenation Strategies for Declining Orchards of Dailekh
  29. 29 VIII International Symposium on Plant Bioregulation in Fruit Production [DOI]

Cited by 3

Effect of Different Plant Growth Regulators on Seed Germination, Seedling Growth and Establishment of Papaya (Carica papaya L.) c.v. Taiwan-7

Abhishek, Samir E. Topno, Annjoe V Joseph · Journal of Advances in Biology & Biotechnology · 2024

The Effect of Foliar Application of Zinc, Potassium, and Boron on Fruit Set and Retention in Kinnow Mandarin

Luxmi ., Gajender Singh Rana, Sakshi · Asian Journal of Soil Science and Plant Nutrition · 2024

Showing 2 of 3 known citations — external sources report more than can currently be individually listed.

Article metrics

Real usage data collected on this platform.

17

Page views

0

PDF downloads

2

Outbound clicks

3

Citations

Views over time

Views by country

Approximate, from request IP at view time — not citizenship or institution. Countries with fewer than 5 views are grouped as "Other".

Traffic sources

Referring site, by host.

Views and downloads exclude known bots/crawlers. Citations combines this platform's own DOI-resolved index with each external source's own reported total — see Cited by above for individually listed citing works. Last refreshed 0 seconds ago.