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    Wyświetlanie 1-11 z 11
    Tytuł:
    Antagonistic activity of some fungi and Actinomycetes against pathogens of damping-off of sugar beet seed lings
    Autorzy:
    Hanna, Nowakowska
    Powiązania:
    https://bibliotekanauki.pl/articles/2199006.pdf
    Data publikacji:
    2005-12-22
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    BCA
    damping-off
    pathogens
    sugar beet
    Opis:
    The antagonistic activity of some Biological Control Agents (BCA) isolates of Trichoderma sp., Penicillium sp., Gliocladium sp., and Actinomycetes - Streptomyces sp. against pathogens of sugar beet damping-off: Aphanomyces cochlioides, Pythium debaryanum and Phoma betae was tested in vivo and in vitro. Fourty-nine isolates of fungi and seventy four of Actinomycetes were isolated from compost and soil in which those pathogens did not occur. The microorganisms effective against at least two pathogens in vitro tests were incorporated into the soil or added to the seed as a treatment during pelleting process. The microorganisms used in vivo tests limited the number of infected seedlings. Some of them protected emerging plants on the same level as fungicides commercially used for seed treatment.
    Źródło:
    Plant Breeding and Seed Science; 2005, 52; 69-78
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological synthesis of Titanium Dioxide nanoparticles by Curcuma longa plant extract and study its biological properties
    Autorzy:
    Abdul Jalill, Raghad DH.
    Nuaman, Rasha S.
    Abd, Ahmed N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182934.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    biosynthesis
    curcuma longa
    damping-off
    nanoparticles
    plant
    tio2
    Opis:
    The objective of this study was biosynthesis of titanium dioxide nanoparticles (TiO2 NPs) using Curcuma longa aqueous extract and characterize them. Study their effect on the growth, sporulation, pathogenicity of Fusarium graminearum and some wheat plants parameters compared with standards industrials nanoparticles. C. longa aquatic extract was used to biosynthesis TiO2 NPs by two methods. At first method, TiO2 was found in both colloidal solutions (CS) and nanopawder while it found in jest nanopawder in second method. All biosynthetic nanoparticles were in nano size. It was: 91.37 nm, 76.36 nm of (CS) and nanopawder for first methods respectively while it was 92.6 nm of nanopawder in second method. All nanoparticles have good optical properties. Crystal’s shape of nanopawder were in three form: anatase, rutilr and brookite and it was anatase in colloidal solutionat first method while it was pure anatase innanopawder when at second method. The average crystallite size of was calculate by Scherer's equation, it was 43.088 nm and 22.881 nm for nanopawder and colloidal solution respectively at first method. It was 45.808 nm for nanopawder at second method. All concentrations of nanoparticles were reduced fungal and spores. These decreasing were more effective using biosynthetic compare with industrial synthetic nanoparticles. There were reductions in damping-off caused by F. graminearum by biosynthetic NBs in both varieties of plant (Al-Rasheed and Tamuze-2). These was better than the effect of industrial synthetic nanoparticles. The resistance to damping off and the growth of plant in Al-Rasheed variety was more sensitive compared with Tamuze-2 variety especially at higher concentrations. There were decrease in all plant's parameters at most concentrations of TiO2 biological synthetic compare with industrial synthetic nanoparticles in Al-Rasheed variety, while there were inductions in some plant's parameters by biosynthetic nanoparticles compared with industrial synthetic in Tamuze-2 variety. Finally, C. longa can be used to biosynthesis TiO2 NPs with good biological properties.
    Źródło:
    World Scientific News; 2016, 49, 2; 204-222
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pathogenicity of Fusarium crookwellense Burgess, Nelson and Toussoun to 12 genotypes of oat (Avena sativa l.).
    Autorzy:
    Mielniczuk, Elżbieta
    Powiązania:
    https://bibliotekanauki.pl/articles/2199152.pdf
    Data publikacji:
    2008-06-22
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    damping off
    field experiment inoculation
    Fusarium crookwellense
    oat genotypes
    susceptibility
    Opis:
    Within the years 2002-2004 12 genotypes of oat (Bachmat, Budrys, Bohun, Chwat, Cwał, Deresz, Hetman, Rajtar, Sam, Szakal, STH 5501, STH 5601) were examined to determine their susceptibility to Fusarium crookwellense. The examination was led under field conditions of Zamość region (south - eastern part of Poland),. Both oat grains and soil were inoculated with Fusarium crookwellense nr 47, what caused a reduction in numbers of seedlings - from 24.6% (cv. Bohun) to 52.9% (cv. Sam); plants before harvest - from 11.6 (cv. Bohun) to 68% (cv. Sam)...
    Źródło:
    Plant Breeding and Seed Science; 2008, 57; 3-12
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparison between Pseudomonas aureofaciens (chlororaphis) and P. fluorescens in biological control of cotton seedling damping-off disease
    Autorzy:
    Samavat, S.
    Heydari, A.
    Zamanizadeh, H.R.
    Rezaee, S.
    Aliabadi, A.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/66475.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Pseudomonas aureofaciens
    Pseudomonas fluorescens
    biological control
    cotton
    seedling
    damping off disease
    plant disease
    Opis:
    Due to the importance of the biological control of plant diseases, testing and introducing new biocontrol-active microorganisms is a major concern among plant pathologists. The causal agent of cotton seedling damping-off disease is Rhizoctonia solani. In this regard, we tried to investigate the antagonistic activities of Pseudomonas aureofaciens (chlororaphis) 30–84 (phenazine producing wild type and non-phenazine producing mutant) strains on R. solani, in comparison with some isolates of P. fluorescent under both in vitro (laboratory) and in vivo (greenhouse) conditions. In the laboratory experiment, the inhibitory effects of all the bacteria, on the growth of R. solani, were evaluated using the dual culture procedure. Results showed that five isolates of P. fluorescent along with both strains of P. aureofaciens significantly inhibited the growth of R. solani. Effective bacterial antagonists were then evaluated in a greenhouse experiment where cotton seeds were coated with their suspensions and were sown in pasteurised field-soil. The soil had been pre-inoculated with a virulent isolate of R. solani. The efficacy of the bacterial antagonists was evaluated by counting the number of surviving seedlings in different treatments, at 15 and 60 days after sowing, for determining pre- and post-emergence damping-off incidence. According to the results of the greenhouse experiment, at both intervals, two isolates of P. fluorescens along with both strains of P. aureofaciens caused significant increases in the number of healthy seedlings, in comparison with the untreated control, and a commonly used fungicide (carboxin-thiram). The efficacy of phenazine producing a wild type strain of P. aureofaciens was higher than its non-phenazine producing mutant, indicating that phenazine plays an important role in the antagonistic activity of P. aureofaciens. Effective bacterial antagonists were then studied for their antagonistic mechanisms. The results showed that all four bacteria employed different mechanisms. The bacteria produced siderophore, and volatile metabolites and non-volatile metabolites, in their antagonistic activities. The results of this study suggest that P. auerofaciens may be a new biocontrol agent for controlling cotton seedling mortality disease.
    Źródło:
    Journal of Plant Protection Research; 2014, 54, 2
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oznaczanie biomasy grzybni w glebie metodą analizy zawartości ergosterolu
    Determination of fungal biomass in soil using ergosterol content analysis
    Autorzy:
    Szwajkowska-Michałek, L.
    Kwaśna, H.
    Perkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/990960.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    gleby lesne
    grzyby glebowe
    biomasa
    oznaczanie
    zawartosc ergosterolu
    metody badan
    metody chemiczne
    ergosterol
    microbiological and chemical analysis of soil
    damping−off fungi
    Opis:
    The presence of microorganisms in the substrate is detected with increasing frequency using chemical methods. During the first 9 weeks ergosterol concentration in sterile or not sterile soil inoculated with one of the damping−off fungi reached 966 μg/g, while number of colony forming units (cfu) went up to 247×103 cfu/g. Ergosterol concentration was correlated with the size of the soil fungal community estimated in terms of the number of colony forming units in soil. Pearson's correlation coefficient was 0.700−0.946 for sterile and not sterile soil. Higher content of ergosterol was observed for F. sambucinum var. sambucinum, H. haematococca and T. cucumeris while higher average content of cfu was observed for H. haematococca and T. cucumeris.
    Źródło:
    Sylwan; 2014, 158, 03; 203-211
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ nanocząstek srebra i miedzi na wzrost i ograniczanie pasożytniczej zgorzeli siewek sosny zwyczajnej (Pinus sylvestris L.) w szkółce Nadleśnictwa Spychowo
    Effect of silver and copper nanoparticles on growth and the control of damping-off disease in Scots pine (Pinus sylvestris L.) in the nursery of Spychowo Forest District
    Autorzy:
    Aleksandrowicz-Trzcińska, M.
    Szaniawski, A.
    Sołtys, A.
    Baszak, K.
    Studnicki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/986655.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    szkolki lesne
    sosna zwyczajna
    Pinus sylvestris
    zgorzel siewek
    ochrona roslin
    zwalczanie chorob roslin
    nanoczastki
    nanoczastki srebra
    nanoczastki miedzi
    skutecznosc dzialania
    seedling growth
    disease control
    pinus sylvestris
    damping−off disease
    nanoparticles
    Opis:
    Nanoparticles are gaining ever−wider application in plant production (for both agriculture and forestry), in the role of pesticides, as well as stimulators of plant growth and resistance. We sought to determine the efficacy of silver and copper nanoparticles (AgNPs and CuNPs respectively), used as seed dressings or subjected to foliar application, in affording protection from parasitic damping−off disease among soil−grown seedlings of Scots pine in a forest nursery. Experiments also assessed the influence of the nanoparticles on the growth of the plants potentially safeguarded in this way. Nanoparticles were used in seed soaking and foliar spraying at 50 ppm concentration. Pines treated with fungicides (Zaprawa Nasienna T 75 DS, Acrobat MZ 69 WG, Topsin M 500 SC, Gwarant 500 SC, Thiram Granuflo 80 WG and Signum 33 WG) or unprotected at all were used for comparison. In each treatment (AgNPs, CuNPs, fungicides or unprotected), seedlings were inventoried 6 weeks after the sowing and at the end of the growing season, while all individuals on 80 1−m−long segments of seed row were counted. At the end of the growing season, shoot length, root−collar diameter, root length and dry mass of shoots and roots were determined. The seedlings treated with nanoparticles had longer root systems of greater dry mass, but also only more weakly−developed above−ground parts (both height and dry mass being limited) in comparison with young Scots pines that had been fungicide−treated or were unprotected. It resulted in a significantly more favourable ratio between shoot and root masses, where nanoparticle treatment had been applied. The effectiveness of the protection extended to the germination and first−growth stages up to 6 weeks from the time of sowing was furthermore shown to be greatest where AgNPs had been applied, while at the season end there were comparable results among pines treated with either nanoparticles or fungicides. Our results thus indicate that nanoparticles limit damping−off disease in pine seedlings (AgNPs more effectively than CuNPs), with that effectiveness also proving comparable with that noted for the fungicides applied traditionally.
    Źródło:
    Sylwan; 2018, 162, 06; 490-498
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Usage of scientific elaborations performed by the lecturers during the educational process on the patterns of phytopathology as an educational discipline
    Wykorzystanie opracowań naukowych wykonywanych przez wykładowców w procesie Kształcenia na wzorach fitopatologii jako dyscypliny edukacyjnej
    Autorzy:
    Cherkis, Tetiana
    Batova, Olena
    Shvydenko, Inna
    Powiązania:
    https://bibliotekanauki.pl/articles/38167658.pdf
    Data publikacji:
    2022
    Wydawca:
    Wyższa Szkoła Techniczna w Katowicach
    Tematy:
    phytopathology
    park-garden management
    recipient
    agrochemicals
    pesticides
    methodical recommendations
    Petri-dish
    preventative sprinkling
    myselium of funguses
    damping-off
    germination
    fitopatologia
    gospodarka parkowa
    agrochemikalia
    pestycydy
    zalecenia metodyczne
    szalka Petriego
    grzybnia grzybów
    Opis:
    The experience of teaching Phytopathology as an educational discipline is being examined in this article. This article shows how a separate topic (theme) can be used in the educational process for intensive learning and better mastering the subject; for assistance in solving specialized and practical problems of professional activity in the sphere of growing decorative plants, creating and exploiting the objects of the park-garden management; in teaching of growing the planting material of decorative plants both in the open air (nurseries) and greenhouses. Varieties of encouraging and stimulating the interest to mastering the subject have been exposed.
    W artykule omawiane są doświadczenia nauczania Fitopatologii, jako dyscypliny edukacyjnej. Artykuł ten pokazuje, jak osobny temat można wykorzystać w procesie edukacyjnym do intensywnego uczenia się i lepszego opanowania przedmiotu. Może stanowić pomoc w rozwiązywaniu specjalistycznych i praktycznych problemów działalności zawodowej w zakresie uprawy roślin ozdobnych, tworzenia i eksploatacji obiektów gospodarki parkowo-ogrodowej, a także nauczaniu uprawy materiału do sadzenia roślin ozdobnych, zarówno na wolnym powietrzu (szkółki), jak i w szklarniach. Wyeksponowane zostały odmiany, zachęcające do opanowania tematu i pobudzające zainteresowania.
    Źródło:
    Zeszyty Naukowe Wyższej Szkoły Technicznej w Katowicach; 2022, 14; 101-108
    2082-7016
    2450-5552
    Pojawia się w:
    Zeszyty Naukowe Wyższej Szkoły Technicznej w Katowicach
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czy Penicillium adametzii może ograniczyć pasożytniczą zgorzel siewek sosny zwyczajnej?
    Can Penicillium adametzii decrease the damping-off in pine?
    Autorzy:
    Szwajkowska-Michałek, L.
    Kwaśna, H.
    Perkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/973825.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    grzyby antagonistyczne
    grzyby zgorzelowe
    metabolity grzybow
    ograniczanie wzrostu
    pasozytnicza zgorzel siewek
    Penicillium adametzii
    samosiewy
    siewki
    wykorzystanie
    choroby roślin
    czynniki chorobotwórcze
    drzewa leśne
    leśnictwo
    skuteczność
    szkółki leśne
    damping−off
    metabolites
    penicillium adametzii
    pine seedlings
    Opis:
    Mixture of the Penicillium adametzii metabolites present in the chloroform extract usually did not inhibit the growth of damping−off fungi, including C. destructans, F. oxysporum. F. sambucinum, F. solani and R. solani, in vitro. Extract from the P. adametzii liquid culture: (i) protected the inoculated pine seedlings from the damping−off only temporarily, (ii) decreased the health of the non−inoculated seedlings, (iii) caused the temporary increases of the fungal population in soil, (iv) changed structure of the soil fungi communities, and (v) caused the continuous increase of Trichoderma, mostly T. aureoviride population. The increase of pine seedlings damping−off was connected with the increase of T. aureoviride population in soil. Natural isolates of P. adametzii cannot be considered as the effective biological factor in the biological control of damping−off.
    Źródło:
    Sylwan; 2011, 155, 01; 46-62
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przyczynek do badań nad wpływem Hebeloma crustuliniforme na występowanie zakaźnej zgorzeli siewek sosny zwyczajnej
    Contribution to studies on the effect of Hebeloma crustuliniforme on damping-off pine seedlings
    Autorzy:
    Stępniewska, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1011794.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    preparat z Hebeloma crustuliniforme
    choroby roslin
    ochrona roslin
    biopreparaty
    skutecznosc
    zgorzel siewek
    sosna zwyczajna
    lesnictwo
    siewki
    Pinus sylvestris
    drzewa lesne
    fitopatologia lesna
    scots pine
    seedlings
    damping−off
    biopreparate
    pathogenicity
    antagonism
    in vitro
    Opis:
    The paper presents the results of the research on the effect of a biopreparate containing vegetative mycelium of Hebeloma crustuliniforme on the pathogenicity of Fusarium oxysporum, Pythium sp. and Rhizoctonia solani causing the damping−off of pine seedlings and on the growth of the pathogens under in vitro conditions. The obtained results do not clearly indicate the positive impact of H. crustuliniforme on seedling health.
    Źródło:
    Sylwan; 2009, 153, 03; 182-188
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ siarczanu glinu na wybrane właściwości gleby oraz na wydajność i jakość sadzonek sosny zwyczajnej w leśnej szkółce gruntowej
    Impact of aluminium sulphate fertilizer on selected soil properties and the efficiency and quality of pine seedlings in the forest ground tree nursery
    Autorzy:
    Januszek, K.
    Stępniewska, H.
    Błońska, E.
    Molicka, J.
    Kozieł, K.
    Gdula, A.
    Wojś, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1317650.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    szkolki lesne
    gleby
    odczyn gleby
    siarczan glinu
    wlasciwosci fizykochemiczne
    aktywnosc enzymatyczna
    fosfataza kwasna
    wschody
    sadzonki
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    mikoryza
    ektomikoryza
    soil pH
    aluminium sulphate
    pine seedlings quality
    ectomycorrhizae
    damping-off
    Opis:
    The alkalization of soil is a common phenomenon in forest ground nurseries. Liming, inadequate fertilization and the use of hard water for irrigation are the main reasons for this alkalization. The aim of this study was to investigate the effect of fertilization with aluminium sulphate on soil pH, the activity of selected soil enzymes, efficiency as well as the growth parameters of pine seedlings. The study was conducted in a forest nursery, on a plot with soil pH 6.4 in water and 5.9 in 1MKCl. Such a pH is not conducive to the production of conifer seedlings, particularly pines. Two different doses of aluminium sulphate fertilizer were applied: 740 kg ha-1 and 1110 kg ha-1. Both doses significantly reduced the soil pH, whereas soil enzyme activity did not change. The lower dose had a positive impact on the growth parameters of pine seedlings, while the higher dose led to their deterioration. We observed statistically significant differences in average primary and lateral root lengths, number of short roots, and thickness of the neck root of seedlings. One- and 2-year-old seedlings did not show symptoms of nutrient deficiency and neither did concentrations of the investigated macronutrients and selected micronutrients in needles indicate such. After applying the higher fertilizer dose, we observed a favourable change in the composition of mycorrhizae. Out of the potential seedling pathogens we found Cylindrocarpon spp., Fusarium spp., Phytophthora spp., Pythium spp. and Rhizoctonia solani of which the most frequent were Fusarium oxysporum, Pythium spp. and R. solani. Their occurrence frequency differed between the treatments used in this experiment. This study confirms the positive effects of a low aluminium dose on the performance and growth parameters of pine seedlings. However, on the basis of the conducted experiments, it is difficult to say, whether this positive effect is due to a direct action of aluminium on the seedlings or rather an indirect effect caused by lowering the soil pH, which in turn impacts on mycorrhizae composition and hence pathogen development.
    Źródło:
    Leśne Prace Badawcze; 2014, 75, 2; 127-138
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and dynamic characterization of composite material dampers for parting-off tools
    Autorzy:
    Daghini, L.
    Archenti, A.
    Nicolescu, C. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/99974.pdf
    Data publikacji:
    2010
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    damping
    parting-off
    model-based identification
    stability
    operational damping ratio
    operational frequencies
    Opis:
    This paper introduces a novel design for parting-off tools and the method to characterize their performance. The principle followed in the design phase was to enhance the damping capability minimizing the loss in static stiffness through implementation of composite material interfaces. The tool has been characterized by the dynamic characteristics criterion, i.e. frequency and damping ratio, of the machining system, as well as the roughness of the machined surface criterion. This paper demonstrates a new model-based method for characterizing the machining system dynamic properties, applied, in this sThe presented mathematical model of the machining system is based on the data recorded by a microphone during operational conditions. In this way, a step beyond the classical method of analyzing the dynamics of a machining system, which separately identifies the structural and process parameters is taken. The analyses together with the experimental results proved that the parting-off tool was able to machine over a wide range of cutting parameters. It was found that the limiting factor for increasing cutting parameters is not the damping capability of the tool but the tool clamping system stiffness and the workholding system dynamic properties. This implies that, in order to further optimize the machining performance, it is vital to take consideration not only the tool-clamp-turret system but the whole machining system.
    Źródło:
    Journal of Machine Engineering; 2010, 10, 2; 57-70
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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