Plant Pathology Science

Najafiniya M. 2016. Management of citrus die-back disease. Plant Pathology Science 5(1):26-36.

Citrus trees are very important plants with high economic value and significant cultivation area in south of Iran. During the recent years, citrus die-back disease caused by Neofusicoccum mangiferae became one of the main treats for citrus production in tropical and sub-tropical regions of Iran. The symptoms of die- back disease are including wilting and declining of branches which start from the tip and then develop to down part of the trunk of infected tree, which sometimes has longitudinal cracks with gum exudation. Cortical layers of infected branches are sloughing off and the mass of fungal spores can be observe easily. Based on some investigations, pathogen is inactive during the winter months and its activity starts from spring and terminates at the end of summer season. The disease is more sever when it occurs in the orchards with poor disease management as well as water and nutrient deficiency. Some cultural practices like a well-managed irrigation and enough fertilizing with no pruning during the summer months, are good disease control measures, which in this paper are discussed.

Parad  M. & Rezaei R. 2015. Citrus greening  disease. Plant Pathology Science 5(1):37-47.

Citrus greening or Huanglongbing, is one of the most devastating disease of citrus worldwide. It is common in the southeast of Asia and is also recently reported from south provinces of  Iran. It is caused by Liberibacter sp. that tend to colonize in phloem vessels of the host. This bacterium affects all of the main types of citrus plants and reduces fruit production. One of the identifying challenges is that some of the disease symptoms are similar to deficiency of some nutrient such as zinc. The most important vectors of the disease causal agent are some psylla species. The only worthwhile control measure is removing the microbial inoculums from the affected tissues. Management of the disease described in this paper.

Golmohammadi, M. & Banihashemian S. N. 2017. Management  method of citrus  blast disease. Plant Pathology Science 6(2):1-13.

Citrus bacterial blast is reported from many parts of citrus growing areas of world. It is one of the most important diseases of citrus in north of Iran, but its damage is different because of year-to-year climate variability. The disease is caused by two species of Pseudomonas. In those years that air humidity and temperature are suitable, these bacterial species can cause serious damage to citrus trees. The main symptom of citrus blast disease is wilting and dieback of branches. Some practices for management of this disease are illustrated in this article.