The Effect of Nitrogen Fertilization on the Growth of Citrus and its Infection Rate with Tetranychus Urticae Koch

Authors

  • Ibrahim Aziz Sakr
  • Haisam Muhamad Ismail
  • Maison Ahmad Jadeed

Abstract

 

The experiments aimed to study the effect of nitrogen fertilization amount and its application times on the growth of citrus seedlings of Aafawi and Navelcultivar, and on its infection rate with Tetranychus urticae Koch. The experiments were carried out in the Faculty of Agriculture/Tishreen University.Three levels of urea were used(A = 0.5,B = 1, C = 1.5g/seedling). These amounts were addedin different quantities and at different times.In experiment N1,the full amount was added on1stof March;in experiment N2 the amount was divided equally and was addedon1stof March and 1stof April; andit was divided into three amounts in the third experiment N3 on 1st of March, 1st of April and 1st of May.

Results showed that transaction (C) achieved the greatest growth of seedlings comparedto the control against the greatest injury when urea was added altogether(the average number of mites183.5).The transaction achieved low injury when urea was added at three times (135 mites) in the case of cultivar Navel, and (132) against (122) in the case ofcultivar Alaafawi.It was also found that the growth rate was stable (from March to September) in experiment N3(additionatthree times) comparedtoexperiment N1 (one addition).Adding nitrogen fertilizerat many times achieves stable growth to citrus seedlings, and lowerstheinfection ratewith Tetranychus urticae Koch.

Downloads

Published

2013-12-16

How to Cite

Sakr, I. A., Ismail, H. M., & Jadeed, M. A. (2013). The Effect of Nitrogen Fertilization on the Growth of Citrus and its Infection Rate with Tetranychus Urticae Koch. Tishreen University Journal -Biological Sciences Series, 35(9). Retrieved from https://journal.tishreen.edu.sy/index.php/bioscnc/article/view/581

Issue

Vol. 35 No. 9 (2013): العلوم البيولوجية

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to the Tishreen University Journal for Research and Scientific Studies - Biological Sciences Series   

 Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in Tishreen University Journal for Research and Scientific Studies - Biological Sciences Series  .  The Readers have the right to send, print and subscribe to the initial version of the article, and the title of Tishreen University Journal for Research and Scientific Studies - Biological Sciences Series    Publisher

journal uses a CC BY-NC-SA license which mean

You are free to:

  • Adapt — remix, transform, and build upon the material
  •  
  • The licensor cannot revoke these freedoms as long as you follow the license terms.

 

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • NonCommercial — You may not use the material for commercial purposes.
  • ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.