Influence of Meteorological Factors on Date Bunch Fading Disorder

Document Type: Research paper


1 Scientific Faculty of Agricultural and Natural Resources Research and Education Center, Fars, Iran.

2 Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, Iran


Date bunch fading disorder (DBFD) has been one of the major issues facing date palm growers in recent decades. This order has caused high and non-compensable losses to date palm product. Despite numerous studies, predominantly focusing on the causes and mitigation methods of this disorder, no precise influencing factors have been established and practices which can completely control it are not available. Increased temperature and low RH have been mentioned as factors responsible for inducing this disorder, other probable factors are biotic stresses, especially fungal infections. Present research was carried out to determine the effects of climatic factors on DBFD occurrence. For this purpose, ten orchards of ‘Kabkab’ cultivar of date palm with a history of previous symptoms of DBFD were selected in Bushehr province during 2012-13. 20 trees in each orchard were selected and 100 fruits on each tree were chosen. Numbers of faded and non-faded fruits were counted and disorder percentage was calculated. The daily meteorological data at meteorological stations near the experimental locations were recorded. Results showed that the damage rate was higher in the first year compared to the second one. Furthermore, in 2013, there was a decrease in temperature and concomitant increase in relative humidity from 2012. This condition leads to excess surface evaporation from the fruits and causes fruit wilting, which is referred to as DBFD.


Alavi, A. 2000. Fading Disaster. 14th Iranian Plant Protection. Isfahan Technical University. p.124 (in Farsi).
Izadi, M. and M. Pouzesh Shirazi. 2010. Effects of Thinning Methods on Date Bunch Disorder at Pollination and Kimri Stages. Acta Hort. 882:899-902.
Izadi, M., and E. Aslemoshtaghi. 2015. Orchard Management for Decreasing Date Palm Bunch Fading Disorder. Int. J. Hort. Sci. Technol., 2(1): 27-32.
Karampour, F., and H. Pejman. 2007. Study on Possible Influence of Pathogenic Fungi on Date Bunch Fading Disorder in Iran. Acta Hort. 739:431-439.
Mansoori, B. 2012. Fusarium Proliferatum Induces Gum in Xylem Vessels as the Cause of Date Bunch Fading in Iran. J. Agr. Sci. and Technol. 14(5):1133-1140.
Mirzaei, M., A. Davoodian and F. Karampour. 2001. Study on Influence of Management Measures of Date Palm Orchards on the Incidence of DBF Disorder. The Final Report Research Project. Agricultural Research Center of Hormozgan Province, Iran. 5p. (in Farsi).
Mohebi, A. 2010. Mineral Elements Concentration in Healthy and Infected Date Bunch Fading Disorder. Acta Hort. 882:345- 352.
Pezhman, H., V. Roshan, and E. Rahkhodaei. 2005. Effects of Cultural Practices on Date Bunch Fading Disorder. Abstracts of the International Conference on Date Palm. Published by King Saud University. 46 p.
Pouzesh Shirazi, M., M. Izadi, and R. Khademi. 2008. Study the Climatical Factors Effects on Bunch Fading Disorder of Date Palm in Southern Iran and the Methods of its Control. American-Eurasian J. Agr. Environ. Sci. 4:570-574.