Essays about: "European aspen"

Showing result 11 - 14 of 14 essays containing the words European aspen.

  1. 11. Infection rate of pine twisting rust (Melampsora pinitorqua) in Scots pine (Pinus sylvestris) regenerations with retained aspens (Populus tremula) : evaluation of the importance of large aspen trees compared to aspen sprouts

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Åsa Fjellborg; [2009]
    Keywords : pine twisting rust; Melampsora pinitorqua; European aspen; Populus tremula; Scots pine; Pinus sylvestris; rust disease; pine regeneration; forest pathology;

    Abstract : Rostsvampen knäckesjuka (Melampsora pinitorqua) är en allvarlig skadegörare i tallungskogar i Sverige. Svampen värdväxlar mellan inhemsk tall (Pinus sylvestris) och asp (Populus tremula). De tydligaste symptomen är böjda eller avbrutna skott i de övre grenvarven i tallarnas krona. READ MORE

  3. 12. Är förekomst av knäckesjuka i tallföryngringar mindre på stora naturvårdsaspar än på aspsly?

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Maja Löfstrand; [2009]
    Keywords : Knäckesjuka; Melampsora pinitorqua; Sporspridning; Naturvårdsasp; Populus tremula; Uredosporer; Teleutosporer; Rostsvampar;

    Abstract : Pine twisting rust (Melampsora pinitorqua) is a parasitic rust fungus found all across Sweden causing damage resulting in lower quality and reduced tree growth in pine stands. In Sweden, the fungus is dependent on two alternate hosts; European aspen (Populus tremula) and Scots pine (Pinus sylvestris). READ MORE

  4. 13. Susceptibility of hybrid aspen (Populus tremula x tremuloides) to pine twisting rust (Melampsora pinitorqua)

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Emma Kassfeldt; [2009]
    Keywords : pine twisting rust; Melampsora pinitorqua; hybrid aspen; Populus tremula x tremuloides; European aspen; rust disease;

    Abstract : Knäckesjuka (Melampsora pinitorqua) är en rostsvamp som orsakar skador på plantor och unga träd av tall (Pinus sylvestris) i Sverige, vilket lokalt kan innebära stora problem. Svampen har en komplicerad livscykel som innefattar en värdväxling mellan tall och asp (Populus sp.). READ MORE

  5. 14. Influence of light competition on vitality in old aspen

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Marianne Karlsson; [2009]
    Keywords : aspen; Populus tremula; vitality; light competition; biodiversity; stand density; management;

    Abstract : European aspen (Populus tremula) is a pioneer tree species that has a high importance for biodiversity. In Sweden, the number of long-continuity aspen stands has decreased during the last century. READ MORE