Claim · model-written summary
Cilantro isolates made light gray colonies and maroon pigment on PDA.
- Taxon
- cilantro
Coriandrum sativumt0 - Outcome
- light gray colonies and a diffusible maroon pigmente0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On PDA, all cilantro isolates produced light gray colonies and a diffusible maroon pigment in the medium”
t0“First Report of Leaf Blight of Cilantro, Coriandrum sativum, Caused by Alternaria poonensis in the United States”
Title
A. E. Nguyen; B. A. Rodriguez; K. J. Zizzo; et al. Plant Disease 2025. doi:10.1094/pdis-11-24-2501-pdn
Other claims from this paper (18)
- Observation Leaf blight occurred in two Ventura County commercial cilantro fields in 2014.
- Observation Symptoms developed from water soaked lesions into necrosis across entire leaves.
- Observation Six nearby fields were affected the next year.
- Observation Disease incidence was estimated at 15 to 50%, making symptomatic cilantro unmarketable.
- Observation The disease was observed in two Monterey County fields in 2017.
- Observation A. dauci isolates made light gray colonies and violet pigment.
- Observation Cilantro isolates had mean conidial dimensions of 57.5 X 20.3 um.
- Observation Cilantro isolate beaks averaged 158 um.
- Intervention effect Cilantro isolates produced 30 to 70% diseased leaf area on cilantro.
- Intervention effect Cilantro isolates produced 0 to 3% diseased leaf area on carrot.
- Intervention effect A. dauci isolates produced 60 to 80% diseased leaf area on carrot.
- Observation Water sprayed controls remained healthy.
- Observation The fungus was reisolated from inoculated cilantro.
- Observation Alt a1 sequences of cilantro isolates had 100% identity and differed by one base pair from A. dauci.
- Observation Calmodulin sequences of cilantro isolates had 100% identity and differed by three base pairs from A. dauci.
- Observation This is the first US report of A. poonensis on cilantro.
- Observation The disease limits cilantro production.
- Observation Alternaria leaf spot resembles bacterial leaf spot and challenges diagnosis.