This is an outdated version published on 2022-03-03. Read the most recent version.

Effect of Different Ethephon Concentrations on Shiss Removal in ‘Khlass’ and ‘Sukkary’ Date Palm Varieties

Authors

  • Abdelazize ElJiati Tokyo University of Agriculture, Dept. of International Agricultural Development, Laboratory of Tropical Horticultural Science. 1-1-1 Sakuragaoka, Setagaya, Tokyo, 156 8502, Japan
  • Imtiaz Ahmed Yousef Bin Abdul Latif and Sons Agriculture Co. Ltd. Research and Development Departnment. Al-Shihiyah. 52758. Gassim, Saudi Arabia
  • Atsushi Sanada Tokyo University of Agriculture, Dept. of International Agricultural Development, Laboratory of Tropical Horticultural Science. 1-1-1 Sakuragaoka, Setagaya,Tokyo, 156 8502, Japan
  • Naoki Terada Tokyo University of Agriculture, Dept. of International Agricultural Development, Laboratory of Tropical Horticultural Science. 1-1-1 Sakuragaoka, Setagaya,Tokyo, 156 8502, Japan
  • Kaihei Koshio Tokyo University of Agriculture, Dept. of International Agricultural Development, Laboratory of Tropical Horticultural Science. 1-1-1 Sakuragaoka, Setagaya,Tokyo, 156 8502, Japan

DOI:

https://doi.org/10.5147/ajb.vi0.229

Abstract

After pollination, aborted date fruits known as tricarpel or shiss, remain on the brunch in most of the varieties and exert competition on fruits in water and nutrients. In Sukkary, they drop down at the end of kimri stage, while remain on ‘Khlass’ until the harvest. Most of them remain as bisr and little turns into tamr which is not appreciated in the date market. They can only be used as paste that has low price compared to dates. In an attempt to get rid of shiss, we sprayed Ethephon at different concentrations on bunches of ‘Sukkary’ and ‘Khlass’ after fruit-set, at hababook stage.Together with the shiss drop, a non-desirable fruit drop also occurs. We are looking for the optimum ethephon concentration where shiss dropped more than fruits. In ‘Khlass’, the Ethephon concentration 800 ppm showed the highest shiss drop (81%) together with a fruit drop of 20% that occurs as well, while in ‘Sukkary’, the concentration of 600 ppm was the best by giving shiss drop equal to 44%together with a fruit drop equal to 12%. We consider that the concentration of 800 ppm at hababook stage is the ideal concentration to generate an optimum drop in shiss with a reasonable percentage of fruit drop. We, therefore highly recommend a trial with this concentration on ‘Sukkary’ as well.

Downloads

Download data is not yet available.

Author Biography

Naoki Terada, Tokyo University of Agriculture, Dept. of International Agricultural Development, Laboratory of Tropical Horticultural Science. 1-1-1 Sakuragaoka, Setagaya,Tokyo, 156 8502, Japan

 

Downloads

Published

2022-03-03

Versions

How to Cite

ElJiati, A., Ahmed, I., Sanada , . A., Terada, N., & Koshio, K. . (2022). Effect of Different Ethephon Concentrations on Shiss Removal in ‘Khlass’ and ‘Sukkary’ Date Palm Varieties. Atlas Journal of Biology, 752–758. https://doi.org/10.5147/ajb.vi0.229

Issue

Section

ARTICLES