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Citrus Sudden Decline Disease in the South of Kerman Province
Mehdi Azadvar, Hamidreza Alizadeh, Mousa Najafinia, Mohammadreza Safarnejad, Samad Esfandiari,
Volume 8, Issue 2 (9-2019)
Abstract
Azadvar M, Alizadeh HR, Najafinia M, Safarnejad MR  and  Esfandiari S (2019) Citrus sudden decline disease in the south of Kerman province. Plant Pathology Science 8(2): 31-37. DOI: 10.2982/PPS.8.2.31
 
During recent years, the newly emerging disease, citrus sudden decline (CSD) has destroyed many of citrus trees grafted onto bael rootstock in the south of Kerman Province. The disease is caused by Candidatus Liberibacter asiaticus and its simultaneous infection to soil born pathogens or Ca. Phytoplasma aurantifolia, or heat and drought stresses can increase the disease severity and appearance of the decline symptoms. Using the healthy and certified rootstock, using the Sour Orange or Volkamer Lemon as rootstock, control of the sucking insects at the time of flushing, optimum irrigation with appropriate distribution especially during the summer season, control of soil born fungi and nematodes, avoiding stress to plant and appropriate pruning are recommended for prevention and management of CSD disease in the south of Kerman Province.

Dynamics of emergence and spread of citrus huanglongbing disease in Iran
Dr. Ali Alizadeh Aliabadi, Dr. Mohammad Mehdi Faghihi, Dr. Mohammad Salehi, Mr. Abolghasem Ghasemi,
Volume 11, Issue 2 ((Spring and Summer) 2022)
Abstract
Alizadeh Aliabadi A, Faghihi MM, Salehi M, Ghasemi A (2022) Dynamics of emergence and spread of citrus huanglongbing disease in Iran. Plant Pathology Science 11(2):11-21.  Doi: 10.2982/PPS.11.2.11

Introduction: Huanglongbing or Fruit Greening is one of the major citrus diseases in Iran that has spread to most of the country's citrus growing provinces. In this study, the prevalence trend of the disease in seven provinces was investigated and analyzed. Materials and Methods: Citrus orchards in Sistan-Balochestan, Hormozgan, Bushehr, Khuzestan, Fars, Kerman and Mazandaran provinces were visited and samples suspected of having this disease were collected, in 2007-2009 and 2017-2019 years. After DNA extraction from the samples, the PCR test was performed using the specific primers OI1/OI2c and A2/J5. Results: It was found that the percentage of infected specimens, infected areas and number of hosts of Candidatus Liberibacter asiaticus, the causative agent of this disease, has increased over this period. At the end of this period, some samples of oranges, tangerines, grapefruits, bitter oranges, Lisbon lemons and Mexican limes were obtained from the provinces: Kerman, Hormozgan, Sistan-Baluchestan, and Fars were infected with the disease. Conclusion: The study of the disease during these years showed that: the infected areas and the host range of the disease have expanded a lot during this period, and the spread of the disease in citrus cultivation areas in the south of the country has been with a gentle slope. The reduction of the disease-carrying psyllium population during these years seems to have been effective in slowing down the spread of the disease.



 
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