scholarly journals A fresh weight-based method for evaluating soybean resistance to red crown rot

2021 ◽  
Author(s):  
Khin Thuzar Win ◽  
Chang-Jie Jiang
Keyword(s):  
Crown Rot ◽  
Fresh Weight ◽  
Red Crown Rot ◽  
Soybean Resistance

scholarly journals Fusarium Root and Crown Rot: A Disease of Container-Grown Hostas

Plant Disease ◽  
2000 ◽  
Vol 84 (9) ◽  
pp. 980-988 ◽  
Author(s):  
B. Wang ◽  
S. N. Jeffers
Keyword(s):  
South Carolina ◽  
Crown Rot ◽  
Undescribed Species ◽  
Fresh Weight ◽  
Fusarium Spp ◽  
Disease Symptoms ◽  
Leaf Yellowing ◽  
Oat Seeds ◽  
Root And Crown Rot ◽  
Fusarium Sp

A previously unreported disease was observed on 11 cultivars of container-grown hosta plants at five wholesale nurseries in South Carolina between 1997 and 1999. Symptoms included leaf yellowing, plant stunting, rotting of and vascular discoloration in roots, and necrosis in the crowns. Fusarium spp. consistently were isolated from symptomatic hosta plants. Four species were recovered: F. solani, F. oxysporum, F. proliferatum, and an undescribed species designated Fusarium sp.; F. solani and Fusarium sp. were recovered most frequently. To demonstrate pathogenicity, four methods were used to inoculate hosta plants with representative isolates of F. solani, F. oxysporum, and Fusarium sp. Two types of inoculum, colonized oat seeds and conidium suspensions, were used to inoculate wounded and nonwounded plants. Disease symptoms occurred consistently only on hosta plants inoculated by dipping wounded roots and crowns into suspensions of conidia. Symptoms were most severe on plants inoculated with Fusarium sp. and much less severe on plants inoculated with F. solani or F. oxysporum. Disease severity increased and fresh weight of inoculated plants decreased when the concentration of inoculum of Fusarium sp. was increased over the range of 1 × 103 to 1 × 107 conidia per ml. Isolates of Fusarium sp., F. solani, and F. oxysporum varied in virulence when Hosta ‘Francee’ plants were inoculated. This study demonstrated that Fusarium root and crown rot of container-grown hostas is caused primarily by Fusarium sp. but that it also can be caused by F. solani and F. oxysporum. Fusarium sp. appears to be taxonomically distinct from other species, and its identity currently is under investigation.

Toxic culture filtrates produced byCalonectria ilicicola, causal agent of red crown rot of soybean

2001 ◽  
Vol 29 (2) ◽  
pp. 115-123 ◽  
Author(s):  
K. D. Kim ◽  
J. S. Russin ◽  
J. P. Snow ◽  
K. E. Damann
Keyword(s):  
Causal Agent ◽  
Crown Rot ◽  
Culture Filtrates ◽  
Red Crown Rot ◽  
Toxic Culture

Red Crown Rot of Hop in Oregon Caused by Phomopsis tuberivora

2013 ◽  
Vol 14 (1) ◽  
pp. 52
Author(s):  
David H. Gent ◽  
George Mueller-Warrant ◽  
Joanna L. Woods ◽  
Melodie L. Putnam ◽  
Megan C. Twomey
Keyword(s):  
Crown Rot ◽  
Management Implications ◽  
Koch’S Postulates ◽  
First Report ◽  
Red Crown Rot ◽  
Weak Growth ◽  
Koch's Postulates

During July 2007, symptoms including weak growth and death of plants of cultivar Fuggle were reported by a hop grower in Marion Co., OR. Phomopsis tuberivora H.T. Güssow & W.R. Foster 1932 was consistently recovered from affected plants. Koch's postulates were fulfilled with three isolates of the fungus, establishing the pathogen and the disease red crown rot as the cause of the damage. This is the first report of red crown rot on hop in Oregon, which may have important management implications for affected hop yards and farms. Accepted for publication 19 March 2013. Published 24 June 2013.

scholarly journals First Report of Soybean Red Crown Rot Caused by Calonectria ilicicola in Taiwan

Plant Disease ◽  
2020 ◽  
Vol 104 (3) ◽  
pp. 979
Author(s):  
H. H. Liu ◽  
Y. M. Shen ◽  
H. X. Chang ◽  
M. N. Tseng ◽  
Y. H. Lin
Keyword(s):  
Crown Rot ◽  
First Report ◽  
Calonectria Ilicicola ◽  
Red Crown Rot

scholarly journals Morphological Characteristics and Molecular Identification of Calonectria ilicicola Causing Soybean Red Crown Rot

2006 ◽  
Vol 12 (3) ◽  
pp. 178-184 ◽  
Author(s):  
Seong-Woo Park ◽  
Hong-Sik Kim ◽  
Sun-Hee Woo ◽  
Heong-Kwon Shim ◽  
Heung-Tae Kim
Keyword(s):  
Molecular Identification ◽  
Morphological Characteristics ◽  
Crown Rot ◽  
Calonectria Ilicicola ◽  
Red Crown Rot

Phylogenetic diversity of Calonectria ilicicola causing Cylindrocladium black rot of peanut and red crown rot of soybean in southern China

2017 ◽  
Vol 83 (5) ◽  
pp. 273-282 ◽  
Author(s):  
Yunpeng Gai ◽  
Qiaowen Deng ◽  
Xinglong Chen ◽  
Mingfang Guan ◽  
Xiang Xiao ◽  
...  
Keyword(s):  
Phylogenetic Diversity ◽  
Southern China ◽  
Crown Rot ◽  
Black Rot ◽  
Calonectria Ilicicola ◽  
Red Crown Rot

scholarly journals Factors Affecting Soybean Root Colonization by Calonectria ilicicola and Development of Red Crown Rot Following Delayed Planting

Plant Disease ◽  
2004 ◽  
Vol 88 (6) ◽  
pp. 613-619 ◽  
Author(s):  
P. U. Kuruppu ◽  
R. W. Schneider ◽  
J. S. Russin
Keyword(s):  
Root Colonization ◽  
Planting Date ◽  
Inoculum Density ◽  
Crown Rot ◽  
Soybean Plant ◽  
Susceptible Cultivar ◽  
Symptom Development ◽  
Soybean Root ◽  
Calonectria Ilicicola ◽  
Red Crown Rot

Field studies were conducted in 1994, 1995, and 1996 to determine the effects of planting date, cultivar susceptibility, and soil pathogen population on soybean root colonization by Calonectria ilicicola and subsequent development of red crown rot. Early season colonization of roots was important for red crown rot symptom development. Symptom development in the more susceptible cultivar, Sharkey, was reduced following delayed planting and remained low in the less susceptible cultivar, Cajun, regardless of planting date. Taproot colonization was positively correlated with inoculum density during all three growing seasons but was strongest in 1994. Also, lateral root colonization correlated positively with inoculum density in 1994, the only year in which foliar symptoms were detected. A substantial decrease in inoculum density in 1995, along with reduced soybean root colonization, were attributed to high soil temperatures and probably low rainfall recorded during that summer. The effect of soybean plant age on root colonization was examined by exposing plants to the pathogen at different ages. Soybean plants were most susceptible to C. ilicicola during the first week after seedling emergence. By the second week, susceptibility was reduced by nearly half, and it remained near that level for the next several weeks.

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