Abstract
During 2009 - 2011, symptoms of curling, yellow and purple discoloration of leaves, stunting of shoots, and formation of bunchy, fibrous secondary roots were observed in several ornamental crops, carrot, celery, and parsley fields located in several production areas of Israel. Incidence of disease was almost 20-80% in individual affected fields. Moreover, the observed symptoms resembled those caused by Spiroplasma citri in carrots affected by the carrot purple leaf disease, recently reported in United States and in Spain. Analyses revealed that high percentage of symptomatic plants tested positive for S. citri. Some of the plants were double infected by S. citri and a phytoplasma. Leafhopper species known to vector phytoplasmas and/or spiroplasmas, have been trapped in several locations in Israel. To our knowledge, this is the first report of S. citri associated with the ‘yellow disease’syndrome in open-field crops in Israel.
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Claims 6
Claim · model-written summary
Symptoms occurred in ornamental crops, carrot, celery and parsley fields in Israel.
Verbatim
e0“symptoms of curling, yellow and purple discoloration of leaves, stunting of shoots, and formation of bunchy, fibrous secondary roots were observed in several ornamental crops, carrot, celery, and parsley fields located in several production areas of Israel”
Claim · model-written summary
Disease incidence reached almost 20-80% in affected fields.
Verbatim
e0“Incidence of disease was almost 20-80% in individual affected fields.”
e1“ornamental crops, carrot, celery, and parsley fields”
Claim · model-written summary
A high percentage of symptomatic plants tested positive for S. citri.
- Taxon
- ornamental crops, carrot, celery, and parsleye1
- Interactor
- S. citriSpiroplasma citrie0pathogen
- Outcome
- symptomatic plants tested positive for S. citrie0
Verbatim
e0“high percentage of symptomatic plants tested positive for S. citri”
e1“ornamental crops, carrot, celery, and parsley fields”
Claim · model-written summary
Some plants were infected by both S. citri and a phytoplasma.
- Taxon
- ornamental crops, carrot, celery, and parsleye1
- Interactor
- S. citriSpiroplasma citrie0pathogen
- Second interactor
- a phytoplasmae0pathogen
- Outcome
- double infectede0
Verbatim
e0“Some of the plants were double infected by S. citri and a phytoplasma.”
e1“ornamental crops, carrot, celery, and parsley fields”
Claim · model-written summary
Leafhopper species that vector phytoplasmas or spiroplasmas were trapped in Israel.
Verbatim
e0“Leafhopper species known to vector phytoplasmas and/or spiroplasmas, have been trapped in several locations in Israel.”
e1“ornamental crops, carrot, celery, and parsley fields”
Claim · model-written summary
The authors report the first association of S. citri with yellow disease syndrome in Israeli open-field crops.
- Taxon
- ornamental crops, carrot, celery, and parsleye1
- Interactor
- S. citriSpiroplasma citrie0pathogen
- Outcome
- S. citri associated with the ‘yellow disease’syndromee0
- Setting
- Israele0
Verbatim
e0“first report of S. citri associated with the ‘yellow disease’syndrome in open-field crops in Israel”
e1“ornamental crops, carrot, celery, and parsley fields”