scholarly journals Groundnut Rust (Puccinia arachidis) Management through Integration of Host Resistance with Fungicides at Babile, Eastern Ethiopia

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Alehegn M
Keyword(s):  
Host Resistance ◽  
Eastern Ethiopia ◽  
Puccinia Arachidis ◽  
Groundnut Rust

Purification, characterization, and antifungal activity of chitinase from Fusarium chlamydosporum, a mycoparasiteto groundnut rust, Puccinia arachidis

1998 ◽  
Vol 44 (7) ◽  
pp. 646-651 ◽  
Author(s):  
N Mathivanan ◽  
V Kabilan ◽  
K Murugesan
Keyword(s):  
Gel Electrophoresis ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Gel Filtration ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Puccinia Arachidis ◽  
Fusarium Chlamydosporum ◽  
Groundnut Rust ◽  
Germ Tubes

Chitinase (EC 3.2.1.14) was isolated from the culture filtrate of Fusarium chlamydosporum and purified by ion-exchange chromatography and gel filtration. The molecular mass of purified chitinase was 40 kDa as estimated by sodium dodecyl sulfate – polyacrylamide gel electrophoresis. Chitinase was optimally active at a pH of 5 and stable from pH 4 to 6 and up to 40°C. Among the metals and inhibitors tested, mercuric chloride completely inhibited the enzyme activity. The activity of chitinase was high on colloidal and pure chitin. The purified chitinase inhibited the germination of uredospores of Puccinia arachidis and also lysed the walls of uredospores and germ tubes. The results from these experiments indicated that chitinase of F. chlamydosporum plays an important role in the biocontrol of groundnut rust. Key words: Fusarium chlamydosporum, chitinase, purification, Puccinia arachidis, uredospores.

Biocontrol potential of rust of groundnut by Acremonium obclavatum

1993 ◽  
Vol 71 (4) ◽  
pp. 639-643 ◽  
Author(s):  
B. Jayapal Gowdu ◽  
R. Balasubramanian
Keyword(s):  
Biological Control ◽  
Key Words ◽  
Arachis Hypogaea ◽  
Rust Fungus ◽  
Puccinia Arachidis ◽  
Culture Filtrates ◽  
Detached Leaves ◽  
Biocontrol Potential ◽  
Groundnut Rust ◽  
Potential Use

Acremonium obclavatum was frequently found associated with pustules of the rust fungus Puccinia arachidis on groundnut in Madras, India. Inoculation of A. obclavatum before, with, or after inoculation with P. arachidis reduced the number and size of uredosori both on intact and detached leaves of groundnut plants. Treatments with A. obclavatum resulted in reductions in number of pustules and uredospores, delay in maturity and opening of uredosori, and reduced viability of uredospores. The application of culture filtrates of A. obclavatum also reduced the number and size of pustules on intact and detached groundnut leaves. The potential use of A. obclavatum in biological control of groundnut rust is discussed. Key words: groundnut, Arachis hypogaea, groundnut rust, Puccinia arachidis, Acremonium obclavatum, biological control.

scholarly journals CSGR-1: A Computer Simulator of Groundnut Rust1

1989 ◽  
Vol 16 (2) ◽  
pp. 73-76 ◽  
Author(s):  
Zhenzhong Wang ◽  
Kung-hsun Lin
Keyword(s):  
Disease Severity ◽  
Data Sets ◽  
Climatic Data ◽  
Independent Data ◽  
Computer Simulator ◽  
Puccinia Arachidis ◽  
Host Growth ◽  
Increase Rate ◽  
Groundnut Rust ◽  
The Relationship

Abstract A computer simulator of groundnut rust (Puccinia arachidis Speg.), CSGR-1, was constructed based on four mathematical submodels describing environmental effects on (1) the increase rate of disease severity and daily multiplication factor of diseased leaflets, (2) the relationship between host growth and the effective accumulated temperatures, and (3) the relationships between infectious tissue and disease severity. The simulator was validated using independent data sets. With CSGR-1, disease development of groundnut rust can be predicted eleven days in advance given appropriate climatic data.

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