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Wyszukujesz frazę "oak decline" wg kryterium: Temat

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    Tytuł:
    Fusarium spp. na nadziemnych organach zamierających dębów - nowe zagrożenie?
    Fusarium spp. on the above-ground organs of dying oaks – a new threat?
    Autorzy:
    Wit, M.
    Sierota, Z.
    Oszako, T.
    Mirzwa-Mróz, E.
    Wakuliński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/989848.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    fitopatologia lesna
    dab
    Quercus
    zamieranie drzew
    paki
    pedy
    grzyby
    Fusarium
    wystepowanie
    zagrozenia roslin
    oak decline
    fusarium spp.
    Opis:
    Oak decline is insufficiently described problem. Declining oaks are in various age and the most commonly observed symptoms of the disease include growth inhibition and buds mortality. The dieback occurs periodically, mainly because of the impact of abiotic factors (drought, frost and the lowering of the groundwater level). In this complex phenomenon the biological factors, including numerous species of Chromista (Chromalveolata) and fungi play important role as well. The list of pathogens responsible for the dieback includes numerous species of Pythium and Phytophthora, as well as Biscogniauxia, Discula, Pleurophoma, Botryosphaeria and Diplodia. Among other organisms responsible for the oak decline are fungi belonging to Fusarium species. The aim of this study was to investigate the species composition of pathogens colonizing the dying oak buds including undeveloped or dying shoots obtained from Łomża, Rudka and Czarna Białostocka forest districts (eastern Poland). Sampling of symptomatic shoots of Quercus robur L. was performed in 2013, respecting different parts of tree crowns (top, central and bottom). Mycological material for analysis included mycelium growing on dying shoots after incubation in a chamber and tissue collected from symptomatic shoots and placed on PDA medium. For selected isolates of fungi the identification was confirmed by the PCR analysis using ITS1 and ITS4 primers. Among analyzed fungi Fusarium spp., Alternaria alternata, Cladosporium cladosporioides, Botryosphaeria quercuum and /em>Coniothyrium spp. required special attention. The Fusarium spp. group of fungi dominated with an average frequency of 32%. The molecular analysis revealed the presence of several species including Fusarium avenaceum, Cladosporium cladosporioides, Lophiostoma corticola and Nectria mauritiicola.
    Źródło:
    Sylwan; 2015, 159, 05; 403-410
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pierwsze dane o występowaniu Phytophthora cinnamomi na dębie szypułkowym w Polsce
    Autorzy:
    Oszako, T.
    Orlikowski, L.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022039.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wystepowanie
    grzyby
    czynniki chorobotworcze
    Phytophthora cinnamomi
    Quercus robur
    lesnictwo
    dab szypulkowy
    siewki
    drzewa lesne
    fitopatologia lesna
    isolation
    phytophthora cinnamomi
    oak decline
    dieback spots
    colonisation
    Opis:
    Phytophthora cinnamomi was isolated from nurseries and in the stand. Declining pedonculate seedlings and adult oaks Quercus robur L showed disease symptoms. Affected seedlings were dying as quick as severe damage of root system occurred. Infected trees showed dieback of crowns and characteristic dark exudation on stems. Beneath the bark necrosis of bast tissue was observed. Apart of P. cinnamomi such fungal pathogens as Fusarium avenaceum and F. oxysporum were isolated from diseased plants. The number of obtained isolates of P. cinnamomi could be probably higher if they were not quickly overgrown by Mucor, Chaetomium and Trichoderma spp. Isolates of P. cinnamomi from oak, pine and spruce cause stem rot of oak seedlings and necrosis spread about 8,5−10,4 mm/24 hr. On infected parts of oak the fastest spread was observed on roots and the slowest on leaf blades.
    Źródło:
    Sylwan; 2005, 149, 10; 47-53
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fosforyny jako czynnik ograniczający zamieranie drobnych korzeni w drzewostanach dębowych Płyty Krotoszyńskiej
    Phosphites as factor limiting the fine root damage in oak stands from Krotoszyn Plateau
    Autorzy:
    Oszako, T.
    Nowaszewski, M.M.
    Szulc, W.
    Rutkowska, B.
    Nowakowska, J.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/985975.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    dab
    Quercus
    choroby roslin
    fytoftoroza korzeni
    zamieranie debow
    czynniki ograniczajace choroby roslin
    fosforyny
    RDLP Poznan
    Plyta Krotoszynska
    drzewostany debowe
    opryski lotnicze
    oak decline
    quercus robur l.
    phytophthora
    phosphites
    rdlp poznań
    Opis:
    Oak decline phenomenon has been observed in Poland in the 1980s. Especially, Krotoszyn Forest District was affected in the years 1982−1984, when oaks were dying in a mass extend causing economic and ecological problems. Twenty five years later many Phytophthora species were isolated from rhizosphere soil suggesting their important role in fine root damage. This research was focused on application of fertilisers increasing oak resistance to soil−borne pathogens. In total, 60 soil samples were collected c.a. 1 meter from trunks of oaks representing control and treated variant with Actifos® and Kalex® fertilisers. The fine root parameters (smaller than 2 mm) were evaluated with the water scanner and WinRhizo software. The same soil samples were analysed for the presence of macro− (N, P, K, Ca, Mg) and microelements (Al, Cu, Fe, Mn, Na, Zn). The use of ammonium and potassium phosphites in the form of foliar spray had a beneficial effect on the health of oak stands (Quercus robur L.) in the Krotoszyn Forest District. Three parameters: defoliation (ICP Forest), vitality according to Roloff method and synthetic index of damage were applied in order to evaluate the status of oaks health. Two aforementioned crown parameters were obtained from visual assessment from the ground, while the synthetic index of damage was calculated according to the formula developed by Dmyterko and Bruchwald. The parameters of fine roots after treatments, especially their number, length and surface improved. Trees with better quality fine roots had more chance to survive in unfavourable environmental conditions like drought. Phosphite treatments of oak stand positively influenced the chemical properties of soil, decreased acidity, but increased availability of Zn for plants, and probably reduced root damage by toxic aluminium ions. An improvement in the health of fine roots (that were saved by phosphites from damage caused by pathogenic species of Phytophthora genus present in the soil) will have a positive effect on the reconstruction of crown architecture (shoots development from dormant buds).
    Źródło:
    Sylwan; 2018, 162, 10; 819-827
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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