Abstract
Eggplant (Solanum melongena) and other Solanum spp. are aecial hosts for Puccinia substriata var. indica, the rust pathogen of pearl millet (Pennisetum glaucum) (2). Although long suspected to be important in epidemic initiation (1), natural infection of eggplant has never been documented in the United States. All previous observations have been the result of deliberate inoculations. Eggplant (cv. Santana) seedlings with sporulating aecia were identified in the inventory of a vegetable transplant producer near Ty Ty, GA, on 22 April 1997. Flats of seedlings were being grown in a greenhouse with adjustable sides for creating an open-air environment for temperature control. Disease incidence was approximately 1.5% in the lot of 10,000 seedlings. Lesions were found most frequently on the first true leaf or less frequently on cotyledons. Aeciospores from 15 arbitrarily selected leaves were used to inoculate pearl millet seedlings in the greenhouse. Each leaf was used to inoculate pearl millet cultivars with no known resistance, and with the Rr 1 resistance gene. Infection was obtained on all cultivars with no resistance genes, verifying pathogen identification. Fourteen isolates infected pearl millet with Rr 1 , revealing that virulence to Rr 1 was common in this sample. The nearest point source of exposed pearl millet debris that could serve as a source of basidiospores was located approximately 9.7 km away from the eggplant. References: (1) H. D. Wells. Plant Dis. Rep. 62:469, 1978. (2) J. P. Wilson et al. Plant Dis. 80:806, 1996.
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Claims 5
Claim · model-written summary
Natural rust infection occurred on eggplant seedlings in Georgia.
- Taxon
- Eggplant
Solanum melongenae0 - Material
- cv. Santanae0
- Interactor
- Puccinia substriata var. indicaPuccinia substriata var. indicat0pathogen
- Outcome
- sporulating aeciae0
- Setting
- Ty Ty, GAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Eggplant (cv. Santana) seedlings with sporulating aecia were identified in the inventory of a vegetable transplant producer near Ty Ty, GA, on 22 April 1997.”
t0“Puccinia substriata var. indica”
Claim · model-written summary
Eggplant seedling disease incidence was approximately 1.5%.
- Taxon
- EggplantSolanum melongenae1
- Interactor
- Puccinia substriata var. indicaPuccinia substriata var. indicat0pathogen
- Outcome
- Disease incidencee0
- Value
- approximately 1.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease incidence was approximately 1.5% in the lot of 10,000 seedlings.”
e1“Eggplant (cv. Santana) seedlings”
t0“Puccinia substriata var. indica”
Claim · model-written summary
Eggplant lesions occurred mostly on first true leaves and less often on cotyledons.
- Taxon
- EggplantSolanum melongenae1
- Organ / stage
- first true leafe0
- Interactor
- Puccinia substriata var. indicaPuccinia substriata var. indicat0pathogen
- Outcome
- Lesionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lesions were found most frequently on the first true leaf or less frequently on cotyledons.”
e1“Eggplant (cv. Santana) seedlings”
t0“Puccinia substriata var. indica”
Claim · model-written summary
All pearl millet cultivars without resistance genes became infected after inoculation.
- Taxon
- pearl millet
Cenchrus americanuse1 - Material
- cultivars with no resistance genese0
- Treatment
- Aeciosporese2
- Interactor
- Puccinia substriata var. indicaPuccinia substriata var. indicat0pathogen
- Outcome
- Infectione0
- Direction
- obtainede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Infection was obtained on all cultivars with no resistance genes, verifying pathogen identification.”
e1“pearl millet cultivars with no known resistance”
e2“Aeciospores from 15 arbitrarily selected leaves were used to inoculate pearl millet seedlings in the greenhouse.”
t0“Puccinia substriata var. indica”
Claim · model-written summary
Fourteen isolates infected pearl millet carrying Rr 1.
- Taxon
- pearl milletCenchrus americanuse0
- Interactor
- Puccinia substriata var. indicaPuccinia substriata var. indicat0pathogen
- Gene
- Rr 1e0
- Outcome
- infected pearl millet with Rr 1e0
- Value
- Fourteen isolatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fourteen isolates infected pearl millet with Rr 1 , revealing that virulence to Rr 1 was common in this sample.”
t0“Puccinia substriata var. indica”