Research ArticleArticles

Effect of Environment, Tree Size and Presence of Wetwood Symptoms on Injectability of American ELM

Robert W. Stack
Arboriculture & Urban Forestry (AUF) August 1988, 14 (8) 195-199; DOI: https://doi.org/10.48044/jauf.1988.047

Article Figures & Data

Tables

  • Table 1a.

    Effect of tree diameter on injectability of mature American elm trees in 1981.

    Size class (dbh cm)Number of treesChemical uptake
    Time (hr)Rate l/hr/cm)
    <50153.4 (1-8.)*0.35
    50-62133.5 (2-9)0.30
    63-75122.4 (1.5-4)0.39
    >75113.3 (1.5-9)0.45
    Total Mean51
    3.20.37

    • ↵* Mean (range)

  • Table 1b.

    Effect of tree diameter on injectability of mature American elm trees in 1982.

    Size class (dbh cm)Number of treesChemical uptake
    Time (hr)Rate l/hr/cm)
    <50302.8 (1.5-7)*0.81
    50-62263.0 (1.5-7)0.67
    63-75222.8 (1.5-6.5)0.74
    >7552.8 (2-3.5)0.72
    Total Mean83
    2.80.75

    • ↵* Mean (range)

  • Table 2.

    Effect of air temperature on injectability of mature elm trees.

    Air temperature (C)
    1819-2122-2425-2728-3031
    Mean time per tree
    1981
    Time (hr)4.43.03.03.12.11.4
    No. of trees31014867
    1982
    Time (hr)3.03.12.82.51.92.1
    No. of trees311223296
    Two-year average
    Time (hr)3.73.12.92.82.01.8
  • Table 3.

    Effect of sky cover on Injectability of mature elm trees.

    Sky cover
    Clear 0Partly .1-.2cloudy .4-.7Cloudy .9-1.0
    Mean time per tree
    1981
    Time (hr)2.53.83.53.8
    No. of trees1410414
    1982
    Time (hr)2.32.52.33.6
    No. of trees9124517
    Two-year average
    Time (hr)2.43.12.93.7
  • Table 4.

    Effect of wetwood symptoms on injectablllty of elm trees.

    Time per tree
    WetwoodNone/traceSlightModerateSevere
    1981
    Time (hr)3.32.92.73.3
    No. of trees2113116
    1982
    Time (hr)2.72.52.22.8
    No. of trees571241
  • Table 5.

    Injection times of mature elm trees in relation to subsequent phytotoxicity.

    SymptomsTraceSlightModerateSevere
    1981
    Time (hr)2.63.43.76.5
    1982
    Time (hr)2.64.6--*--*

    • ↵* No trees in this category.

  • Table 6.

    Injection times of mature elm trees which later healed injection holes rapidly or slowly.

    Degree of healing after 22 months
    1981High (>75%)Low < 70%)
    All trees
    Number2719
    Time (hr)2.43.7
    Trees 51 cm
    Number1618
    Time (hr)1.83.5
Back to top

In this issue

Print
Download PDF
Email Article
Citation Tools
Effect of Environment, Tree Size and Presence of Wetwood Symptoms on Injectability of American ELM
Robert W. Stack
Arboriculture & Urban Forestry (AUF) Aug 1988, 14 (8) 195-199; DOI: 10.48044/jauf.1988.047
del.icio.us logo Digg logo Reddit logo Twitter logo CiteULike logo Facebook logo Google logo Mendeley logo
Bookmark this article

Jump to section