Abstract
Corn is considered an important cereal crop world over.This work aimed to characterize the causative agent of southern corn leaf blight disease.Diseased samples with fusiform, elliptical and elongated lesions on the leaves were obtained from affected farms of four different areas within Malaysia.The morphological characters of the 10 isolates were observed.The conidia were curved and elongated.The results of morphological characteristics showed that potato sucrose agar was suitable for the rapid growth of pathogen with a mean of 10.19 mm day -1 , followed by corn meal agar (8.56 mm day -1 ) and potato dextrose agar (5.46 mm day -1 ).The temperature of 30C was found the most suitable for pathogen growth with a mean of 7.30 mm day -1 .These isolates were classified into 4 groups in terms of colony color: dark gray, light gray, gray to green and gray.The conidial length ranged from 44.12 m to 81.61 m for isolate CH006 and CH004, respectively.Likewise, the number of septa ranged from 4-6 to 8-10 for isolates CH006 and CH004, respectively.The pathogenicity test on corn variety Thai Super Sweet (TSS) showed that the isolates CH001 and CH009 were the most aggressive while the isolate CH010 was the least aggressive.Results from molecular and morphology studies confirmed that all the 10 isolates were identified as C. heterostrophus.We suggest that as a result of the race diversity of C. heterostrophus, further investigations should be carried out on virulence determination and race detection of this pathogen.
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Claims 12
Claim · model-written summary
The pathogen isolates had curved and elongated conidia.
- Taxon
- Corn
Zea mays subsp. mayst0 - Outcome
- conidiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The conidia were curved and elongated”
t0“Corn Leaf Blight (SCLB) Disease in Malaysia”
e1“all the 10 isolates were identified as C. heterostrophus”
Claim · model-written summary
Potato sucrose agar supported the most rapid pathogen growth, 10.19 mm day -1.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- potato sucrose agare0
- Interactor
- pathogene0pathogen
- Outcome
- growth of pathogene0
- Direction
- rapide0
- Value
- 10.19 mm day -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato sucrose agar was suitable for the rapid growth of pathogen with a mean of 10.19 mm day -1”
t0“Corn Leaf Blight”
Claim · model-written summary
Corn meal agar supported pathogen growth of 8.56 mm day -1.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- corn meal agare0
- Value
- 8.56 mm day -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn meal agar (8.56 mm day -1 )”
t0“Corn Leaf Blight”
e1“all the 10 isolates were identified as C. heterostrophus”
Claim · model-written summary
Potato dextrose agar supported pathogen growth of 5.46 mm day -1.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- potato dextrose agare0
- Value
- 5.46 mm day -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potato dextrose agar (5.46 mm day -1 )”
t0“Corn Leaf Blight”
e1“all the 10 isolates were identified as C. heterostrophus”
Claim · model-written summary
Pathogen growth was greatest at 30C, averaging 7.30 mm day -1.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 30Ce0
- Interactor
- pathogene0pathogen
- Outcome
- pathogen growthe0
- Direction
- most suitablee0
- Value
- 7.30 mm day -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The temperature of 30C was found the most suitable for pathogen growth with a mean of 7.30 mm day -1”
t0“Corn Leaf Blight”
Claim · model-written summary
The isolates formed four colony-color groups.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- 4 groups in terms of colony colore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These isolates were classified into 4 groups in terms of colony color: dark gray, light gray, gray to green and gray”
t0“Corn Leaf Blight”
e1“all the 10 isolates were identified as C. heterostrophus”
Claim · model-written summary
Conidial length ranged from 44.12 m in CH006 to 81.61 m in CH004.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- conidial lengthe0
- Value
- 44.12 m to 81.61 me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The conidial length ranged from 44.12 m to 81.61 m for isolate CH006 and CH004, respectively”
t0“Corn Leaf Blight”
e1“all the 10 isolates were identified as C. heterostrophus”
Claim · model-written summary
Septa number ranged from 4-6 in CH006 to 8-10 in CH004.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- number of septae0
- Value
- 4-6 to 8-10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of septa ranged from 4-6 to 8-10 for isolates CH006 and CH004, respectively”
t0“Corn Leaf Blight”
e1“all the 10 isolates were identified as C. heterostrophus”
Claim · model-written summary
CH001 and CH009 were most aggressive on corn variety TSS.
- Taxon
- cornZea mays subsp. mayse0
- Material
- Thai Super Sweet (TSS)e0
- Interactor
- isolates CH001 and CH009e0pathogen
- Outcome
- most aggressivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pathogenicity test on corn variety Thai Super Sweet (TSS) showed that the isolates CH001 and CH009 were the most aggressive”
Claim · model-written summary
CH010 was least aggressive on corn variety TSS.
- Taxon
- cornZea mays subsp. mayse0
- Material
- Thai Super Sweet (TSS)e0
- Interactor
- isolate CH010e0pathogen
- Outcome
- least aggressivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pathogenicity test on corn variety Thai Super Sweet (TSS) showed that the isolates CH001 and CH009 were the most aggressive while the isolate CH010 was the least aggressive”
Claim · model-written summary
All ten isolates were identified as C. heterostrophus.
- Taxon
- CornZea mays subsp. mayst0
- Interactor
- C. heterostrophuse0pathogen
- Outcome
- identified as C. heterostrophuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all the 10 isolates were identified as C. heterostrophus”
t0“Corn Leaf Blight”
Claim · model-written summary
The authors recommend further study of virulence and race identity.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- virulence determination and race detectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“further investigations should be carried out on virulence determination and race detection of this pathogen”
t0“Corn Leaf Blight”