‘Cylindrocarpon ’ and Ilyonectria Species Causing Root and Crown Rot Disease of Potted Laurustinus Plants in Italy

2014 ◽  
Vol 163 (7-8) ◽  
pp. 675-680 ◽  
Author(s):  
Dalia Aiello ◽  
Vladimiro Guarnaccia ◽  
Filomena Epifani ◽  
Giancarlo Perrone ◽  
Giancarlo Polizzi
Keyword(s):  
Crown Rot ◽  
Root And Crown Rot ◽  
Rot Disease

scholarly journals Incidence of Root and Crown Rot Disease of Black cumin in the Southwest of Iran

2019 ◽  
Vol 8 (2) ◽  
pp. 1-8
Author(s):  
Fariba Ghaderi ◽  
Keyword(s):  
Crown Rot ◽  
Black Cumin ◽  
Root And Crown Rot ◽  
Rot Disease ◽  
Southwest Of Iran

scholarly journals A New Root and Crown Rot Disease of Heath in California Caused by Cylindrocladium pauciramosum

Plant Disease ◽  
1999 ◽  
Vol 83 (6) ◽  
pp. 589-589 ◽  
Author(s):  
S. T. Koike ◽  
D. M. Henderson ◽  
P. W. Crous ◽  
C. L. Schoch ◽  
S. A. Tjosvold
Keyword(s):  
North America ◽  
Species Complex ◽  
Ground Cover ◽  
First Record ◽  
Crown Rot ◽  
Conidial Suspension ◽  
Similar Disease ◽  
Crown Tissue ◽  
Root And Crown Rot ◽  
Rot Disease

Heath (Erica capensis Salter) is a woody, evergreen plant used in Cali-fornia as a landscape shrub or ground cover. In 1997, a new root and crown disease was found in commercial nursery plantings of potted heath. A similar disease was found in 1998 on heath transplants being grown as liners. In both situations, roots were necrotic and crown tissue turned brown. Affected plants became gray-green in color, withered, and died. A Cylindrocladium species was consistently isolated from roots, crowns, and lower stems of symptomatic plants. Isolates were characterized by having penicillate conidiophores terminating in obpyriform to broadly ellipsoidal vesicles. Conidia were hyaline, 1-septate, straight with rounded ends, (30-) 45 to 55 (-60) × (3.5-) 4 to 5 μm, placing it in the Cylindrocladium candelabrum Viégas species complex. Ten single-conidial isolates produced perithecia with viable progeny of Calonectria pauciramosa C.L. Schoch & Crous when mated on carnation leaf agar with tester strains of Cylindrocladium pauciramosum C.L. Schoch & Crous (1). Matings with tester strains of all other species in this complex proved unsuccessful. Pathogenicity of 8 representative isolates was confirmed by applying 3 ml of a conidial suspension (3.0 × 105 conidia per ml) to the crowns of potted, 6-month-old, rooted heath cuttings that were subsequently maintained in a greenhouse (23 to 25°C). After 2 weeks, plant crowns and roots developed symptoms similar to those observed in the field, and plants later wilted and died. C. pauciramosum was reiso-lated from all plants. Control plants, which were treated with water, did not develop any symptoms. The tests were repeated and the results were similar. This is the first report of C. pauciramosum as a pathogen of heath, and the first record of this pathogen from North America. Reference: (1) C. L. Schoch et al. Mycologia 91:286, 1999.

scholarly journals First Report of a Root and Crown Rot Disease of Myrtle in California Caused by Cylindrocladium pauciramosum

Plant Disease ◽  
2001 ◽  
Vol 85 (4) ◽  
pp. 448-448 ◽  
Author(s):  
S. T. Koike ◽  
P. W. Crous
Keyword(s):  
Species Complex ◽  
The United States ◽  
Crown Rot ◽  
Conidial Suspension ◽  
First Report ◽  
Potted Plants ◽  
Crown Tissue ◽  
Root And Crown Rot ◽  
Plant Pathol ◽  
Rot Disease

Myrtle (Myrtus communis) is a woody, evergreen plant used in California as a landscape shrub or potted plant. In 2000, a new root and crown disease was found in commercial nursery myrtle being grown as potted plants. Roots were necrotic and crown tissue was brown. Affected plants became gray-green in color, withered, and died. A Cylindrocladium sp. was consistently isolated from roots, crowns, and lower stems of symptomatic plants. Isolates were characterized by having penicillate conidiophores terminating in obpyriform to broadly ellipsoidal vesicles. Conidia were hyaline, 1-septate, straight with rounded ends, (50-) 53 to 56 (-58) × (3.5-) 4 to 6 μm, placing it in the Cylindrocladium candelabrum Viégas species complex. Single-conidial isolates (STE-U 4012 to 4018) produced perithecia with viable progeny of Calonectria pauciramosa C.L. Schoch & Crous when mated on carnation leaf agar with tester strains of Cylindrocladium pauciramosum C.L. Schoch & Crous (2). Matings with tester strains of all other species in this complex proved unsuccessful. Only one mating type of C. pauciramosum has thus far been found in the United States. Pathogenicity of representative isolates was confirmed by applying 5 ml of a conidial suspension (1.0 × 106 conidia/ml) to the crowns of potted, 5-month-old, rooted mytle cuttings that were subsequently maintained in a greenhouse (23 to 25°C). After 4 weeks, plant crowns and roots developed symptoms similar to those observed in the nursery, and plants later wilted and died. C. pauciramosum was re-isolated from all plants. Control plants, which were treated with water, did not develop any symptoms. The tests were repeated and the results were similar. This is the first report of C. pauciramosum as a pathogen of myrtle in California. The disease has been reported on myrtle in Europe (1). References: (1) G. Polizzi and P. W. Crous. Eur. J. Plant Pathol. 105:407, 1999. (2) C. L. Schoch et al. Mycologia 91:286, 1999.

scholarly journals RESISTANCE SOURCES OF WHEAT GENOTYPES FOR ROOT AND CROWN ROT DISEASE CAUSAL ORGANISM Fusarium culmorum (W.G. SMITH)

2019 ◽  
pp. 99-103
Author(s):  
Gul Imriz ◽  
Fatih Ozdemir ◽  
Murat Nadi Tas ◽  
Birol Ercan ◽  
lker Topa ◽  
...  
Keyword(s):  
Fusarium Culmorum ◽  
Crown Rot ◽  
Causal Organism ◽  
Wheat Genotypes ◽  
Resistance Sources ◽  
Root And Crown Rot ◽  
Rot Disease

scholarly journals EFFCIENCY OF SOME BIOLOGICAL AND CHEMICAL TREATMENTS AGAINST WHEAT ROOT AND CROWN ROT DISEASE

2019 ◽  
Vol 46 (6) ◽  
pp. 1901-1918
Author(s):  
Ahmed El-Enany ◽  
Entsar Abbas ◽  
M. Zayed ◽  
Mahmoud Atia
Keyword(s):  
Wheat Root ◽  
Crown Rot ◽  
Chemical Treatments ◽  
Root And Crown Rot ◽  
Rot Disease

scholarly journals Wilt, Crown, and Root Rot of Common Rose Mallow (Hibiscus moscheutos) Caused by a NovelFusariumsp.

Plant Disease ◽  
2017 ◽  
Vol 101 (2) ◽  
pp. 354-358 ◽  
Author(s):  
S. L. Lupien ◽  
F. M. Dugan ◽  
K. M. Ward ◽  
K. O’Donnell
Keyword(s):  
Rna Polymerase Ii ◽  
Root Rot ◽  
Molecular Phylogenetics ◽  
Phylogenetic Analyses ◽  
Elongation Factor ◽  
Crown Rot ◽  
Root And Crown Rot ◽  
Fusarium Sp ◽  
Crown And Root Rot ◽  
Rot Disease

A new crown and root rot disease of landscape plantings of the malvaceous ornamental common rose mallow (Hibiscus moscheutos) was first detected in Washington State in 2012. The main objectives of this study were to complete Koch’s postulates, document the disease symptoms photographically, and identify the causal agent using multilocus molecular phylogenetics. Results of the pathogenicity experiments demonstrated that the Fusarium sp. could induce vascular wilt and root and crown rot symptoms on H. moscheutos ‘Luna Rose’. Maximum-likelihood and maximum-parsimony phylogenetic analyses of portions of translation elongation factor 1-α and DNA-directed RNA polymerase II largest and second-largest subunit indicated that the Hibiscus pathogen represents a novel, undescribed Fusarium sp. nested within the Fusarium buharicum species complex.

scholarly journals Situation of Fusarium root and crown rot disease of wheat in Iran

2021 ◽  
Vol 10 (1) ◽  
pp. 97-106
Author(s):  
Saeedeh Dehghanpour Farashah ◽  
Mehrdad Salehzadeh ◽  
◽  
Keyword(s):  
Crown Rot ◽  
Root And Crown Rot ◽  
Rot Disease

Root and crown rot of strawberry caused by Pythium helicoides and its distribution in strawberry production areas of Japan

2014 ◽  
Vol 80 (5) ◽  
pp. 423-429 ◽  
Author(s):  
Yasushi Ishiguro ◽  
Kayoko Otsubo ◽  
Hideki Watanabe ◽  
Mikihiko Suzuki ◽  
Kiichi Nakayama ◽  
...  
Keyword(s):  
Crown Rot ◽  
Root And Crown Rot ◽  
Pythium Helicoides ◽  
Production Areas
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