scholarly journals Occurrence of leaf blight on welsh onion (Allium fistulosum L.) caused by Botrytis sp.

2010 ◽  
Vol 52 ◽  
pp. 53-55
Author(s):  
Atsuko Taniwatari ◽  
Kumiko Oka ◽  
Kiyotsugu Okada
Keyword(s):  
Leaf Blight ◽  
Allium Fistulosum ◽  
Welsh Onion

scholarly journals Studies on Black Leaf Blight of Welsh Onion, Allium fistulosum. I. Conditions of Disease Occurrence and Certain Biological Characteristics of the Causal Fungus.

1998 ◽  
Vol 64 (1) ◽  
pp. 43-49
Author(s):  
Kunihei KISHI ◽  
Toshiko FURUKAWA ◽  
Takao KOBAYASHI ◽  
Toshimasa SHIRAISHI ◽  
Hiroshi SAKAI ◽  
...  
Keyword(s):  
Leaf Blight ◽  
Biological Characteristics ◽  
Allium Fistulosum ◽  
Welsh Onion ◽  
Disease Occurrence ◽  
Causal Fungus

Stemphylium Leaf Blight of Welsh onion (Allium fistulosum): An Emerging Disease in Sanxing, Taiwan

Plant Disease ◽  
2021 ◽  
Author(s):  
Chun-Hsiang Wang ◽  
Yi Chen Tsai ◽  
Ichen Tsai ◽  
Chia-Lin Chung ◽  
Yu-Chen Lin ◽  
...  
Keyword(s):  
Sustainable Management ◽  
Mycelial Growth ◽  
Its Region ◽  
Leaf Blight ◽  
Conidial Germination ◽  
Allium Fistulosum ◽  
Vegetable Crops ◽  
Welsh Onion ◽  
And Control

Welsh onion (Allium fistulosum L.) is one of the main and oldest vegetable crops grown in Taiwan. A severe epidemic of leaf blight in Welsh onion caused by a Stemphylium-like pathogen was found in Sanxing, Taiwan, from 2018 to 2020. However, correct species identification, biology and control of Stemphylium leaf blight (SLB) of Welsh onion is not well established. Therefore, the main objective of this study was to investigate the causal agent of SLB in Sanxing and evaluate the in vitro sensitivity of Stemphylium-like pathogen to commonly used fungicides. Phylogenetic analysis based on combining the internal transcribed spacer (ITS) region, and glyceraldedyhe-3-phosphate dehydrogenase (gapdh) and calmodulin (cmdA) gene sequences together with morphological features, identified S. vesicarium as associated with SLB in Sanxing. When inoculated onto Welsh onion leaves, the isolates caused symptoms identical to those seen in the field and S. vesicarium was reisolated, confirming Koch’s postulates. We observed a higher incidence of SLB symptoms on the oldest leaves compared with younger leaves. The maximum and minimum temperatures for in vitro mycelial growth and conidial germination (%) of S. vesicarium were 20 to 30°C and 5°C respectively. Sixteen fungicides were tested for their effectiveness to reduce the mycelial growth and conidial germination of S. vesicarium in vitro. Boscalid + pyraclostrobin, fluopyram, fluxapyroxad, fluxapyroxad + pyraclostrobin were highly effective at reducing mycelial growth and conidial germination in S. vesicarium. However, strobilurin fungicides (azoxystrobin and kresoxim-methyl) commonly used in Welsh onion production in Sanxing were ineffective. This study discusses the emergence of SLB caused by S. vesicarium in the foliar disease complex affecting Welsh onion and the management of the disease using fungicides with different modes of action in Taiwan. The research will underpin the sustainable management of SLB in Sanxing, Taiwan, however further field assessments of the fungicides are warranted.

scholarly journals Studies on Black Leaf Blight of Welsh Onion, Allium fistulosum. II. Taxonomic Examination of the Causal Fungus.

1998 ◽  
Vol 64 (1) ◽  
pp. 57-62
Author(s):  
Takao KOBAYASHI ◽  
Kunihei KISHI ◽  
Toshiko FURUKAWA ◽  
Kazuyoshi TANAKA ◽  
Toshimasa SHIRAISHI ◽  
...  
Keyword(s):  
Leaf Blight ◽  
Allium Fistulosum ◽  
Welsh Onion ◽  
Causal Fungus ◽  
Taxonomic Examination

scholarly journals Phytochemical Analysis and In Vitro Effects of Allium fistulosum L. and Allium sativum L. Extracts on Human Normal and Tumor Cell Lines: A Comparative Study

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 574
Author(s):  
Adrian Bogdan Țigu ◽  
Cristian Silviu Moldovan ◽  
Vlad-Alexandru Toma ◽  
Anca Daniela Farcaș ◽  
Augustin Cătălin Moț ◽  
...  
Keyword(s):  
Cell Line ◽  
Allium Sativum ◽  
Allium Fistulosum ◽  
Tumor Cell Lines ◽  
Sensitive Cell ◽  
Sensitive Cell Line ◽  
Welsh Onion ◽  
Normal Cells ◽  
Ic50 Value ◽  
High Concentrations

Allium sativum L. (garlic bulbs) and Allium fistulosum L. (Welsh onion leaves) showed quantitative differences of identified compounds: allicin and alliin (380 µg/mL and 1410 µg/mL in garlic; 20 µg/mL and 145 µg/mL in Welsh onion), and the phenolic compounds (chlorogenic acid, p-coumaric acid, ferulic acid, gentisic acid, 4-hydroxybenzoic acid, kaempferol, isoquercitrin, quercitrin, quercetin, and rutin). The chemical composition determined the inhibitory activity of Allium extracts in a dose-dependent manner, on human normal cells (BJ-IC50 0.8841% garlic/0.2433% Welsh onion and HaCaT-IC50 1.086% garlic/0.6197% Welsh onion) and tumor cells (DLD-1-IC50 5.482%/2.124%; MDA-MB-231-IC50 6.375%/2.464%; MCF-7-IC50 6.131%/3.353%; and SK-MES-1-IC50 4.651%/5.819%). At high concentrations, the cytotoxic activity of each extract, on normal cells, was confirmed by: the 50% of the growth inhibition concentration (IC50) value, the cell death induced by necrosis, and biochemical determination of LDH, catalase, and Caspase-3. The four tumor cell lines treated with high concentrations (10%, 5%, 2.5%, and 1.25%) of garlic extract showed different sensibility, appreciated on the base of IC50 value for the most sensitive cell line (SK-MES-1), and the less sensitive (MDA-MB-231) cell line. The high concentrations of Welsh onion extract (5%, 2.5%, and 1.25%) induced pH changes in the culture medium and SK-MES-1 being the less sensitive cell line.

Effect of γ-irradiation on volatile compounds of dried Welsh onion (Allium fistulosum L.)

2006 ◽  
Vol 75 (2) ◽  
pp. 322-328 ◽  
Author(s):  
Rajendra Gyawali ◽  
Hye-Young Seo ◽  
Hyun-Ju Lee ◽  
Hyun-Pa Song ◽  
Dong-Ho Kim ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Allium Fistulosum ◽  
Γ Irradiation ◽  
Welsh Onion

Identification and characterization of a glossy mutant in Welsh onion (Allium fistulosum L.)

2017 ◽  
Vol 225 ◽  
pp. 122-127 ◽  
Author(s):  
Liuyi Yang ◽  
Qianchun Liu ◽  
Yongqin Wang ◽  
Lecheng Liu
Keyword(s):  
Allium Fistulosum ◽  
Welsh Onion ◽  
Glossy Mutant ◽  
Identification And Characterization
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