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.

scholarly journals Antifungal activity of plant essential oils against Verticillium dahliae Klebahn, the causal agent of verticillium wilt of pepper

2019 ◽  
Vol 34 (1) ◽  
pp. 39-46
Author(s):  
Jelena Lukovic ◽  
Biljana Todorovic ◽  
Svetlana Milijasevic-Marcic ◽  
Emil Rekanovic ◽  
Miroslav Kostic ◽  
...  
Keyword(s):  
Essential Oils ◽  
Verticillium Wilt ◽  
Verticillium Dahliae ◽  
Harmful Effect ◽  
Causal Agent ◽  
Mentha Piperita ◽  
Black Pine ◽  
Plant Essential Oils ◽  
Two Samples

Biofungicides based on plant oils have some advantages compared to chemical fungicides, especially considering their harmful effect on the environment. Twenty-two essential oils from Germany and Albania were assayed for inhibitory and fungicidal activity against Verticillium dahliae Klebahn, the causal agent of Verticillium wilt of pepper, using the macrodilution fumigant method. The concentrations of oils obtained in the vapour phase were: 0.02, 0.04, 0.08, 0.16 and 0.32 ?l ml-1 with determined minimum inhibitory and fungicidal concentrations. The strongest activity was shown by two samples of mint oil (Mentha piperita L.) at 0.02 ?l ml-1 of air, both from Germany and Albania, followed by plant essential oils of eucalyptus (Eucalyptus globulus Labilardie), black pine (Pinus nigra L.) and cade (Juniperus oxycedrus L.), and all of them were lethal to the pathogen. Nine oils: two samples of mint, cade, eucalyptus, black pine, lavender (Lavandula angustifolia Mill.), sage (Salvia officinalis L.) and rosemary (Rosmarinus officinalis L.) inhibited the growth of Verticillium dahliae, while five oils (two samples of mint, eucalyptus, black pine and cade) showed fungicidal effects on the pathogen. These results showed that mint, eucalyptus, black pine and cade essential oils have a potential for further in vivo experiments against Verticillium dahliae.

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.

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 Yield and content of essential oils in the common origanum nursery

2021 ◽  
Vol 36 ◽  
pp. 01002
Author(s):  
Maria Reneva ◽  
Valeriy Gubanov ◽  
Vera Gubanova
Keyword(s):  
Essential Oils ◽  
Field Research ◽  
Comparative Assessment ◽  
Experimental Site ◽  
Plant Materials ◽  
Three Samples ◽  
Two Samples ◽  
The World ◽  
Raw Plant Materials ◽  
The Common

Common origanum is one of the most famous spices, it is popular all over the world. The purpose of this work is to conduct a comparative assessment of the yield of raw plant materials and the content of essential oils in common origanum plants. Field research was carried out in 2019-2020 at the experimental field of the Northern Trans Urals Research Institute - a branch of the Tyumen Research Center SB RAS (Moskovsky settlement of the Tyumen district). The soil of the experimental site belongs to the subtype of dark gray forest, heavy loamy according to the granulometric composition. From the studied 350 common origanum samples, 16 samples were isolated. All samples were evaluated according to the following criteria: the yield of raw plant materials and the amount of essential oil. The Khutoryanka variety is accepted as the standard. For two years of research, three samples were distinguished from the studied samples of common origanum in terms of the yield of raw plant materials compared to the standard: 12-2-2; 13-2-1; 15-2-1, the yield of these numbers was from 3.6 to 3.9 t/ha, this is (13.3, 10.0, 6.6 %) higher than the standard. From the studied samples of common origanum, two samples were distinguished by the content of essential oils in dry plant materials - 14-2-3 and 21-1-1. The harvest per hectare of these samples was, respectively, 750 and 928 ml in 2019, and in 2020, 1026 and 1120 ml/ha.

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