Abstract
Yellow leaf curl disease of chili pepper caused by Pepper yellow leaf curl virus (PYLCV) has been reported as an important disease in Java and Bali. Disease severity reached 80−100% and it may cause significant yield losses. In order to reduce the negative impact of synthetic insecticides, silica application was evaluated for its potency to suppress the disease. A greenhouse experiment was conducted using randomly block design with 2 factors: PYLCV isolate (Java and Bali) and silica (SiO2) treatment (with and without). Parameters observed were disease symptoms, incubation period, disease incidence and severity, and total silica level. The symptoms of virus infection in Pelita 8 and Seret cultivars were yellow mosaic, leaf curl, green mosaic, dwarf, and cupping upward or downward. A Specific DNA fragment of 912 bp was successfully amplified from 4 samples. Four sequences were obtained and further analysis showed their highest homology, i.e. 96% and 97% with Pepper yellow leaf curl Indonesia virus-Java (PYLCIV-Java) (JX416180) and PYLCIV-KrthAl (LC381274), respectively. Infection by different virus isolates did not affect disease severity significantly. The application of silica was able to delay symptom development and to suppress the severity of the disease in the range of 16.67−30.33%. Silica application on the soil increased the total content of silica in the plants. However, a further experiment is required to understand the mode of action of silica in inducing plant resistance to the pathogen.
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Claims 7
Claim · model-written summary
Infected Pelita 8 and Seret chili pepper cultivars showed yellow mosaic, leaf curl, green mosaic, dwarf, and cupping upward or downward symptoms.
CapsicumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chili Pepper”
e0“The symptoms of virus infection in Pelita 8 and Seret cultivars were yellow mosaic, leaf curl, green mosaic, dwarf, and cupping upward or downward”
Claim · model-written summary
A specific DNA fragment of 912 bp was amplified from 4 chili pepper samples.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chili Pepper”
e0“A Specific DNA fragment of 912 bp was successfully amplified from 4 samples”
Claim · model-written summary
Four sequences obtained had highest homology of 96% and 97% with Pepper yellow leaf curl Indonesia virus-Java and PYLCIV-KrthAl, respectively.
- Interactor
- Pepper yellow leaf curl Indonesia virus-Javae0pathogen
- Outcome
- highest homologye0
- Value
- 96% and 97%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chili Pepper”
e0“Four sequences were obtained and further analysis showed their highest homology, i.e. 96% and 97% with Pepper yellow leaf curl Indonesia virus-Java (PYLCIV-Java) (JX416180) and PYLCIV-KrthAl (LC381274), respectively”
Claim · model-written summary
Infection by different virus isolates did not significantly affect disease severity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chili Pepper”
e0“Infection by different virus isolates did not affect disease severity significantly”
Claim · model-written summary
Silica application delayed symptom development of yellow leaf curl disease in chili pepper compared with no silica.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chili Pepper”
e0“The application of silica was able to delay symptom development”
e1“silica (SiO2) treatment (with and without)”
Claim · model-written summary
Silica application suppressed disease severity of yellow leaf curl disease in chili pepper by 16.67-30.33% compared with no silica.
- Treatment
- application of silicae0
- Interactor
- Pepper yellow leaf curl virusPepper yellow leaf curl viruse2pathogen
- Outcome
- severity of the diseasee0
- Direction
- suppresse0
- Value
- 16.67−30.33%e0
- Comparator
- withoute1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chili Pepper”
e0“The application of silica was able to delay symptom development and to suppress the severity of the disease in the range of 16.67−30.33%”
e1“silica (SiO2) treatment (with and without)”
e2“Pepper yellow leaf curl virus (PYLCV)”
Claim · model-written summary
Silica applied to the soil increased the total silica content in chili pepper plants.
- Treatment
- Silica application on the soile0
- Outcome
- total content of silica in the plantse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chili Pepper”
e0“Silica application on the soil increased the total content of silica in the plants”