scholarly journals Effect of fungicides on the mycelial growth of Alternaria alternata causing leaf spot disease in ashwagandha

2016 ◽  
Vol 9 (1) ◽  
pp. 153-157
Author(s):  
N. KALIESWARI ◽  
I. YESU RAJA ◽  
M. DEVI
Keyword(s):  
Alternaria Alternata ◽  
Leaf Spot ◽  
Mycelial Growth ◽  
Leaf Spot Disease ◽  
Spot Disease

A New Leaf Spot Disease of Calotropis gigantean Caused by Alternaria alternata in Rajasthan, India

2009 ◽  
Vol 10 (1) ◽  
pp. 45
Author(s):  
Satish K. Sain ◽  
H. N. Gour ◽  
P. Sharma ◽  
P. N. Chowdhry
Keyword(s):  
Alternaria Alternata ◽  
Leaf Spot ◽  
First Record ◽  
Leaf Spot Disease ◽  
Koch’S Postulates ◽  
Calotropis Gigantea ◽  
Spot Disease ◽  
Koch's Postulates

Madar (Calotropis gigantea) is a medicinally important wild shrub native to India. The seed floss is used for furniture stuffing and the bark for nets and twine. In early 2005, we observed a leaf spot epidemic of madar growing on wasteland sites near the Sikar district of Rajasthan, India. Koch's Postulates were completed. This is the first record of the disease from the Sikar district of the Rajasthan state of India. Accepted for publication 6 February 2009. Published 31 March 2009.

scholarly journals Leaf Spot Disease Caused by Alternaria alternata on Rehmannia glutinosa in China

Plant Disease ◽  
2020 ◽  
Vol 104 (11) ◽  
pp. 3059-3059
Author(s):  
Jia-fang Du ◽  
Wen-kai Nian ◽  
Zhang-jin Zhou ◽  
Tao Dou ◽  
Guo-hong Song ◽  
...  
Keyword(s):  
Alternaria Alternata ◽  
Leaf Spot ◽  
Leaf Spot Disease ◽  
Rehmannia Glutinosa ◽  
Spot Disease

scholarly journals First Report of Alternaria Alternata Causing Brown Leaf Spot on Apricot (Prunus Armeniaca) in Karbala Province of Iraq

2021 ◽  
Vol 910 (1) ◽  
pp. 012080
Author(s):  
Zeinab L. Hameed ◽  
Adnan A. Lahuf ◽  
Mundher T. Jasim ◽  
Hassan M. Mohsen ◽  
Bahaa J. Kadim ◽  
...  
Keyword(s):  
Alternaria Alternata ◽  
Leaf Spot ◽  
Causative Factor ◽  
Prunus Armeniaca ◽  
Leaf Spot Disease ◽  
First Report ◽  
Spot Disease ◽  
Brown Leaf Spot ◽  
Rdna Sequencing ◽  
Brown Leaf

Abstract During a survey in season 018, leaf spot symptoms were commonly observed on apricot (Prunus armeniaca) trees in the orchards of Al-Hussainiya district in Karbala Province of Iraq. The symptomatic leaves were gathered, the associated fungus was isolated and characterized relied on its morphological features and ITS-rDNA sequencing. The causative factor was found to be the fungus Alternaria alternata that caused distinguishable leaf spot symptoms on the inoculated leaves of apricot. Based on a review of previous references relatedof this disease in Iraq, this is the first report of the brown leaf spot disease caused by A. alternata in Karbala province of Iraq.

scholarly journals Analysis of virulence and genetic variability of Alternaria alternata associated with leaf spot disease in potato plants in Iran

2018 ◽  
Vol 53 (1) ◽  
Author(s):  
Mehdi Nasr Esfahani
Keyword(s):  
Genetic Variability ◽  
Alternaria Alternata ◽  
Leaf Spot ◽  
Random Amplified Polymorphic Dna ◽  
Management Strategies ◽  
Opportunistic Pathogen ◽  
Leaf Spot Disease ◽  
Plasma Membrane Atpase ◽  
Spot Disease ◽  
Vegetables And Fruits

Leaf spot disease in potato is caused by <em>Alternaria alternata</em> (Fr.) Keissler, an opportunistic pathogen that infests many agricultural crops worldwide in the field and during postharvest storage of vegetables and fruits. <em>Alternaria alternata</em> is associated with leaf spot disease in potato in Iran. Thus, there is a need to investigate the virulence and genetic variability of Iranian <em>A. alternata</em> isolates to facilitate the development of appropriate management strategies. In the present study, we analyzed a total of 28 isolates obtained from the main potato-growing regions of Iran, including the Ardebil, Hamedan, Isfahan, and Fars provinces. The pathogens were characterized based on sequence analysis of the genes encoding glyceraldehyde-3-phosphate dehydrogenase (<em>gpd</em>), plasma membrane ATPase, <em>Alternaria</em> allergen a 1 (Alt a1), calmodulin, and actin. In addition, random amplified polymorphic DNA (RAPD), intersimple sequence repeat (ISSR), and virulence studies were performed. Phylogenetic analysis of the combined dataset indicated that the five representative isolates were grouped with the subcluster comprising <em>A. alternata</em>. RAPD and ISSR analyses clustered the 28 <em>A. alternata</em> isolates into different groups with no correlation with their corresponding geographical origins. Results of the pathogenicity assay indicated that all <em>A. alternata</em> isolates were pathogenic against potato. However, the <em>A. alternata</em> isolates showed high variability in terms of virulence.

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