Occurrence of Cryphonectria parasitica the causal agent of chestnut blight in Iran

2006 ◽  
Vol 55 (6) ◽  
pp. 815-815 ◽  
Author(s):  
M. N. Kazempour ◽  
S. A. Khodaparast ◽  
M. Arefipour ◽  
M. Salehi ◽  
B. Amanzadeh ◽  
...  
Keyword(s):  
Cryphonectria Parasitica ◽  
Causal Agent ◽  
Chestnut Blight

scholarly journals Evaluation of Chestnut Susceptibility to Cryphonectria parasitica: Screening under Controlled Conditions

Agriculture ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1158
Author(s):  
Emigdio Jordán Muñoz-Adalia ◽  
Andreu Meijer ◽  
Joan Abel ◽  
Carlos Colinas ◽  
Neus Aletà ◽  
...  
Keyword(s):  
Fungal Growth ◽  
Longitudinal Axis ◽  
Cryphonectria Parasitica ◽  
Causal Agent ◽  
Chestnut Blight ◽  
Vascular Tissues ◽  
Individual Genotype ◽  
Controlled Conditions ◽  
The Individual ◽  
Preliminary Selection

Cryphonectria parasitica (Murrill) M.E. Barr (Sordariomycetes, Valsaceae) is the causal agent of chestnut blight. This disease is a major concern for chestnut cultivation in Europe. The fungus colonizes vascular tissues and evolves generating cankers causing severe dieback and the death of the tree. Excised and debarked well-lignified shoots of 28 C. sativa genotypes (assay A) and of 10 progenies (assay B) were inoculated with C. parasitica strain FMT3bc2 (vcg: EU2). Fungal growth was measured along the longitudinal axis on the 3rd and 6th days after inoculation. Results indicated the inoculation methodology works and the results were clear after 6 days. Differences in susceptibility to chestnut blight among C. sativa trees of Montseny have been detected both at the individual genotype level and at the progeny level. Nineteen genotypes and four progenies showed a susceptibility to Blight not significantly different from C. mollissima. The methodology was easy to apply in extensive/preliminary selection screenings to assess the susceptibility of C. sativa materials to the Blight.

scholarly journals Toxicity of plant essential oils to Cryphonectria parasitica (Murr.) barr, the causal agent of chestnut blight

2019 ◽  
Vol 34 (2) ◽  
pp. 89-96
Author(s):  
Jelena Lukovic ◽  
Ivana Potocnik ◽  
Emil Rekanovic ◽  
Svetlana Milijasevic-Marcic ◽  
Biljana Todorovic ◽  
...  
Keyword(s):  
Essential Oils ◽  
Fungicidal Activity ◽  
Cryphonectria Parasitica ◽  
Causal Agent ◽  
Chestnut Blight ◽  
Silver Fir ◽  
Black Pine ◽  
Plant Essential Oils ◽  
Three Samples ◽  
Two Samples

Twenty-two essential oil samples from Germany and Albania were assayed to test their inhibitory and fungicidal activity against Cryphonectria parasitica (Murr.) Barr., the major causal agent of chestnut blight on chestnut trees, using the fumigant macrodilution method. Test concentrations of the oils in air phase were: 0.02, 0.04, 0.08, 0.16 and 0.32 ?l ml-1, and minimum inhibitory and fungicidal concentrations were determined. The strongest activity was shown by two samples of mint oil from Germany and Albania, and black pine at the concentration of 0.02 ?l ml-1 of air for both test isolates (M1 and 4S). The tested plant essential oils also included: eucalyptus, sage, silver fir and cade. Only three samples of EOs (mint (2) and black pine) were lethal to both isolates. Sage and silver fir oils were more toxic to the M1 isolate, while cade and eucalyptus oils were more toxic to the 4S isolate. Fifteen oils: mint (2), black pine, cade, eucalyptus, silver fir, sage, pine (4), oregano, lavender, and rosemary (2), inhibited the growth of Cryphonectria parasitica, and seven oils (two samples of mint, eucaliptus, black pine, sage, silver fir and cade) showed fungicidal effects on the pathogen.

Crypt1, an active Ac-like transposon from the chestnut blight fungus, Cryphonectria parasitica

2001 ◽  
Vol 265 (4) ◽  
pp. 730-738 ◽  
Author(s):  
D. Linder-Basso ◽  
R. Foglia ◽  
P. Zhu ◽  
B.I. Hillman
Keyword(s):  
Cryphonectria Parasitica ◽  
Chestnut Blight ◽  
Chestnut Blight Fungus

scholarly journals The Morphology and the Biological Control of Cryphonectria parasitica

2012 ◽  
Vol 69 (1) ◽  
Author(s):  
Carmen Emilia PUIA ◽  
Daniela Andreea GRIGORESCU ◽  
Raluca Vasilica MICLEA
Keyword(s):  
Biological Control ◽  
Virulent Strain ◽  
Morphological Characteristics ◽  
Castanea Sativa ◽  
Cryphonectria Parasitica ◽  
Chestnut Blight ◽  
Dual Culture ◽  
Natural Form ◽  
Hypovirulent Strain ◽  
Endothia Parasitica

Cryphonectria parasitica  (Murr.) Bar [syn. Endothia parasitica (Murr. And.] (anamorf: Endothiella sp .) is the causal agent of chestnut bark disease or chestnut blight, disease which produced great damages throughout the world, for example, in Europe, the European chestnut tree ( Castanea sativa (P.) Mill) was heavily affected. Environmental concerns have focused attention on natural forms of disease control as an effective alternative to chemical pesticides. In the chestnut blight fungus, Cryphonectria parasitica deals with a natural form of biological control in which the virulence of a fungal pathogen is attenuated by an endogenous viral RNA genetic element- the hypovirulent strain. In our researches we picked samples of chestnut bark from different areas in Maramures county. We’ve isolated the fungus on PDA medium and we’ve studied the morphological characteristics of the usual virulent strain and we looked for a possible hypovirulent strain in order to study its capacity for biological control. The fungus develops in the bark and in cambium where forms a yellowish or brownish stroma and produces both conidia and ascospores. The pycnidia stromata break through the lenticels producing conidia and later in the same stroma develop the perithecia which produce ascospores. Both strains of the fungus were found in the research area. The hypovirulent strain had a slower development, showed no sporu lation and pigmentation “white cultural strain” and was tested in vitro for the capacity to convert the virulent isolates by dual culture tests.

Sign in / Sign up

Export Citation Format

Share Document