scholarly journals Characteristics of virus and virus-like rose degeneration and dieback diseases

2013 ◽  
Vol 57 (1-2) ◽  
pp. 89-98
Author(s):  
Marek S. Szyndel
Keyword(s):  
Causal Agent ◽  
Rose Flower ◽  
Rose Rosette ◽  
Colour Break ◽  
Leaf Curl

Presented review of rose diseases, associated with the plant degeneration symptoms, includes rose streak, rose colour break, rose rosette or rose witches' broom, rose dieback, rose wilt, rose stunt, rose leaf curl, rose spring dwarf, rose little leaf, rose "frisure", rose bud proliferation and rose flower proliferation. Most of these disorders are characterized by stunting or dwarfing of plants accompanied by a partial wilt and dieback of shoots. Proliferation and epinasty often occurred. Apart from detected viruses (TSV. SLRSV) parts of degeneration syndrome have been transmitted by grafting other have failed to achieve any transmission of the causal agent. It seems likely that rose degeneration disorders in spite of symptom similarities are due to a complex of interacting factors including probably viruses.

scholarly journals A discovery 70 years in the making: characterization of the Rose rosette virus

2011 ◽  
Vol 92 (7) ◽  
pp. 1727-1732 ◽  
Author(s):  
Alma G. Laney ◽  
Karen E. Keller ◽  
Robert R. Martin ◽  
Ioannis E. Tzanetakis
Keyword(s):  
Rna Virus ◽  
Causal Agent ◽  
Low Diversity ◽  
The Usa ◽  
Rose Rosette ◽  
Diversity Studies ◽  
The Rose ◽  
Negative Sense ◽  
Eastern Half

Rose rosette was first described in the early 1940s and it has emerged as one of the most devastating diseases of roses. Although it has been 70 years since the disease description, the rosette agent is yet to be characterized. In this communication, we identify and characterize the putative causal agent of the disease, a negative-sense RNA virus and new member of the genus Emaravirus. The virus was detected in 84/84 rose rosette-affected plants collected from the eastern half of the USA, but not in any of 30 symptomless plants tested. The strong correlation between virus and disease is a good indication that the virus, provisionally named Rose rosette virus, is the causal agent of the disease. Diversity studies using two virus proteins, p3 and p4, demonstrated that the virus has low diversity between isolates as they share nucleotide identities ranging from 97 to 99%.

Preliminary investigation of the causal agent(s) of a disease causing leaf curl of tobacco in South Africa

1997 ◽  
Vol 46 (2) ◽  
pp. 282-290 ◽  
Author(s):  
M. Paximadis ◽  
G. Dusterwald ◽  
L. Duyver ◽  
M. E. C. Rey
Keyword(s):  
South Africa ◽  
Preliminary Investigation ◽  
Causal Agent ◽  
Leaf Curl

Rose Rosette Disease on Multiflora Rose (Rosa multiflora) in Indiana and Kentucky

1988 ◽  
Vol 2 (4) ◽  
pp. 442-444 ◽  
Author(s):  
Dale F. Hindal ◽  
James W. Amrine ◽  
Robert L. Williams ◽  
Terry A. Stasny
Keyword(s):  
Causal Agent ◽  
Rosa Multiflora ◽  
Ohio Valley ◽  
Eriophyid Mite ◽  
Multiflora Rose ◽  
Rose Rosette ◽  
The Rose ◽  
Rose Rosette Disease

Multiflora roses showing symptoms of rose rosette were found in nine counties in southern Indiana and two counties in northern Kentucky. The eriophyid mite, Phyllocoptes fructiphilus Kiefer (Acari: Eriophyidae), implicated as the vector of the rose rosette agent, occurred on most symptomatic material. Another eriophyid mite, P. rosarum Liro, was found on symptomatic material collected in Kentucky. Transmission of the causal agent into multiflora rose by shield budding and by P. fructiphilus was successful. The rose rosette agent appears to be spreading east and is established on multiflora rose in the Ohio Valley.

Control of the Bemisia tabaci/Tomato yellow leaf curl virus complex on protected tomato crops in Algarve (Portugal)*

EPPO Bulletin ◽  
2002 ◽  
Vol 32 (1) ◽  
pp. 31-35
Author(s):  
A. F. Arsenio ◽  
E. Neto ◽  
N. Ramos ◽  
S. Mangerico ◽  
E. Fortunato ◽  
...  
Keyword(s):  
Bemisia Tabaci ◽  
Tomato Yellow Leaf ◽  
Yellow Leaf ◽  
Virus Complex ◽  
Leaf Curl Virus ◽  
Leaf Curl

Phytotoxic tetranorditerpenoids from the fungus Sclerotinia homoeocarpa, causal agent of dollar spot in turfgrass

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
HMT Herath ◽  
WHMW Herath ◽  
SO Duke ◽  
M Tomaso-Peterson ◽  
NPD Nanayakkara
Keyword(s):  
Causal Agent ◽  
Sclerotinia Homoeocarpa ◽  
Dollar Spot

Constituents from Morus root bark against Venturia inaequalis – the causal agent of apple scab

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
JM Rollinger ◽  
R Spitaler ◽  
M Menz ◽  
P Schneider ◽  
EP Ellmerer ◽  
...  
Keyword(s):  
Venturia Inaequalis ◽  
Apple Scab ◽  
Causal Agent ◽  
Root Bark

GUL-E- SURKH (Rosa damascena Mill.) AND ITS THERAPEUTIC USES DESCRIBED IN UNANI LITERATURE

2018 ◽  
Vol 4 (1) ◽  
pp. 411-414
Author(s):  
Nazamuddin Md ◽  
Wadud Abdul ◽  
Najeeb Jahan ◽  
Tanwir Alam M ◽  
Asim Mohammad Khan ◽  
...  
Keyword(s):  
Therapeutic Indication ◽  
Review Article ◽  
Rosa Damascena ◽  
Ibn Sina ◽  
Rose Flower ◽  
Therapeutic Uses

Gul-e-Surkh (Rose flower) is the Persian name for the Rosa damascena Mill. In Unani system of medicine Rose flower is used for medicinal purposes. Ibn Sina considers Gul-e- Surkh as one of the best drug for liver. Rose flower in various doses form and/or in combination with many other drugs are indicated in various disease. It is commonly being used as general tonic for Lungs, Stomach, Intestine, Liver, Rectum, Kidney, Heart, and Uterus. Fresh flowers are purgative and dried one is astringent in properties. In this review article authors try to encompass the therapeutic indication of Rosa damascena Mill described in Unani literature.

Colletotrichum Gloeosporioides Species Complex: Pathogen Causing Anthracnose, Gummosis and Die-Back Diseases of Cashew (Anacardium Occidentale L.) In Ghana

2020 ◽  
Vol 2 (6) ◽  
Author(s):  
A. Muntala ◽  
P. M. Norshie ◽  
K. G. Santo ◽  
C. K. S. Saba
Keyword(s):  
Species Complex ◽  
Colletotrichum Gloeosporioides ◽  
Potato Dextrose Agar ◽  
Causal Agent ◽  
Anacardium Occidentale ◽  
Causative Organism ◽  
Pathogenicity Test ◽  
Small Water ◽  
Colletotrichum Gloeosporioides Species Complex

A survey was conducted in twenty-five cashew (Anacardium occidentale) orchards in five communities in the Dormaa-Central Municipality of Bono Region of Ghana to assess the incidence and severity of anthracnose, gummosis and die-back diseases on cashew. Cashew diseased samples of leaves, stem, inflorescences, twigs, flowers, nuts and apples showing symptoms (e. g. small, water-soaked, circular or irregular yellow, dark or brown spots or lesions on leaves, fruits and flowers, sunken surface, especially on the apples, blight, gum exudates) were collected for isolation of presumptive causative organism. The pathogen was isolated after disinfecting the excised diseased pieces in 70% ethanol, plated on potato dextrose agar (PDA) and incubated at 28 oC for 3 to 7 days. The identity of the putative pathogen was morphologically and culturally confirmed as belonging to Colletotrichum gloeosporioides species complex using standard mycological identification protocols. The pathogen had varied conidia sizes of between 9-15 up to 20 μm in length and diameter of 3-6 μm. The conidia were straight and cylindrically shaped with rounded or obtuse ends. The septate mycelium was whitish-grey, velvety and cotton-like in appearance from the top. The results confirmed the presence of the pathogen in the orchards with incidence ranging from 6.9% and 14.0% for gummosis and averaged 22.9% for anthracnose infected orchards. The result of the pathogenicity test confirmed the isolates to be pathogenic on inoculated cashew seedlings and were consistently re-isolated, thereby establishing the pathogen as the true causal agent of the said diseases in cashew trees and thus completed the Koch’s postulate.

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