Isolation, Identification, and Pathogenicity of Phytophthora Blight of Pigeonpea

2018 ◽  
Vol 19 (3) ◽  
pp. 233-236
Author(s):  
Mamta Sharma ◽  
Raju Ghosh

Phytophthora blight is an emerging threat in pigeonpea. This article briefly discusses diagnosis of Phytophthora blight on pigeonpea including the symptoms and signs, taxonomy, and geographic distribution. Methods of isolation, identification, and storage of Phytophthora cajani (causal organism of Phytophthora blight) are also discussed. This information will be useful to all researchers involved in the diagnosis and management of Phytophthora blight of pigeonpea.

2006 ◽  
Vol 7 (1) ◽  
pp. 38 ◽  
Author(s):  
Martin I. Chilvers ◽  
Lindsey J. du Toit

Diagnosis of detection and identification of Botrytis species associated with neck rot, scape blight, and umbel blight of onion are discussed in detail, including the disease's symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification (including macroscopic vs. microscopic characteristics), and storage of the pathogens. Accepted for publication 7 August 2006. Published 27 November 2006.


2003 ◽  
Vol 4 (1) ◽  
pp. 11 ◽  
Author(s):  
D. E. Mathre ◽  
R. H. Johnston ◽  
W. E. Grey

Diagnosis of common root rot of wheat and barley is discussed in detail, including its symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification, and storage of the common root rot pathogen. Accepted for publication 17 July 2003. Published 19 August 2003.


2003 ◽  
Vol 4 (1) ◽  
pp. 12 ◽  
Author(s):  
J. M. Davidson ◽  
S. Werres ◽  
M. Garbelotto ◽  
E. M. Hansen ◽  
D. M. Rizzo

Diagnosis of Sudden Oak Death, ramorum leaf blight, and ramorum shoot dieback on a wide variety of hosts are discussed in detail, including the symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification, and storage of Phytophthora ramorum, the pathogen which causes Sudden Oak Death. Accepted for publication 6 June 2003. Published 7 July 2003.


2003 ◽  
Vol 4 (1) ◽  
pp. 10 ◽  
Author(s):  
Philip F. Harmon ◽  
Richard Latin

Diagnosis of gray leaf spot (caused by Magnaporthe oryzae) of perennial ryegrass (Lolium perenne) is discussed in detail, including the disease's symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification, and storage of M. oryzae. Accepted for publication 29 January 2003. Published 10 March 2003.


2006 ◽  
Vol 7 (1) ◽  
pp. 43 ◽  
Author(s):  
Amanda Hodges ◽  
Greg Hodges

Identification of pink hibiscus mealybug is discussed in detail, including its symptoms and signs, host range, taxonomy, and geographic distribution, as well as methods of isolation, identification, and preservation. Accepted for publication 18 March 2006. Published 14 April 2006.


2004 ◽  
Vol 5 (1) ◽  
pp. 18
Author(s):  
Dean A. Glawe

Wood forget-me-not cultivars are popular ornamentals in the Pacific Northwest. In western Washington, this species frequently displays symptoms and signs of powdery mildew after anthesis. This report records the disease from King, Pierce, Snohomish, and Skagit counties and describes and illustrates symptoms of the disease as well as taxonomically important features of the causal organism. Accepted for publication 29 October 2004. Published 24 November 2004.


1976 ◽  
Vol 16 (83) ◽  
pp. 915 ◽  
Author(s):  
DLS Wimalajeewa

The causal organism of bacterial soft rot of celery was isolated and characterized, and its control was studied. The causal organism was identified as Erwinia carotovora var. carotovora (Jones) Dye. It was also pathogenic on potato in the glasshouse, causing atypical black leg symptoms. The practical implications of this finding are discussed. Infection appeared to occur at all temperatures tested in the range 1-35�C. Disease development was optimal at 30�C, but was completely checked at 1�C. Four chemicals were evaluated in the laboratory for control in transit and storage. Sodium hypochlorite provided the best control. Two copper fungicides were evaluated in the field. Cupric hydroxide provided the best control. The suitability of using this fungicide for the control of Septoria leaf spot as wall, during summer, is discussed.


JRSM Open ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 205427042098573
Author(s):  
Deepak Rajput ◽  
Shashank Kumar ◽  
Ankit Rai ◽  
S Chezhian

Due to the lack of much insight into the SARS-CoV-2 and overlapping symptoms and signs with other respiratory infections, diagnosis and management is often challenging in chest ailments particularly tuberculosis.


EDIS ◽  
2007 ◽  
Vol 2007 (17) ◽  
Author(s):  
Wayne M. Jurick II ◽  
Dario F. Narvaez ◽  
Carrie L. Harmon ◽  
James J. Marois ◽  
David L. Wright ◽  
...  

PP-235, a 4-page illustrated fact sheet by Wayne M. Jurick II, Dario F. Narvaez, Carrie L. Harmon, James J. Marois, David L. Wright, and Philip F. Harmon, describes this fungal plant disease new to the US since 2004, its symptoms, causal organism, disease cycle and epidemiology, diagnosis, and management. Includes links to web-based resources and references. Published by the UF Department of Plant Pathology, July 2007.


2004 ◽  
Vol 5 (1) ◽  
pp. 13 ◽  
Author(s):  
Muhammad Ali Khanzada ◽  
Abdul Mubeen Lodhi ◽  
Saleem Shahzad

Diagnosis of dieback and gummosis (caused by Lasiodiplodia theobromae (Pat.)) on mango in Sindh, Pakistan is described, including: taxonomy; symptoms and signs; host range; geographical distribution; pathogen isolation, identification, and storage; and pathogenicity tests. Accepted for publication 16 January 2004. Published 2 March 2004.


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