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Research ArticleArticles

Fruit Inhibition in Quercus Species Using Growth Regulators

Pam Elam and John Baker
Arboriculture & Urban Forestry (AUF) March 1996, 22 (2) 109-110; DOI: https://doi.org/10.48044/jauf.1996.016
Pam Elam
Environmental Horticulture Advisor, University of California Cooperative Extension, 1720 S. Maple Avenue, Fresno, CA 93701
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John Baker
Environmental Horticulture Advisor, University of California Cooperative Extension, 1720 S. Maple Avenue, Fresno, CA 93701
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Article Figures & Data

Tables

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    Table 1.

    Rating scale for leaf quality evaluation.

    Rating scaleComment
    1Leaves and twigs dead
    2Leaves yellowed, large necrotic areas, some to severe leaf drop, and severe epinasty of remaining foliage
    3Moderate epinasty of the foliage, moderate leaf necrosis, and slight leaf drop
    4Only minor cupping of the leaves, no cupping or necrosis associated with treatment, and no leaf drop observed
    5No yellowing, no leaf drop, no cupping or necrosis associated with treatment, and good leaf color appropriate for the species
    • View popup
    Table 2.

    Comparison of number of acorns in treated area 1 month after application of fruit suppression growth regulator.

    TreatmentRate/10galMean number of fruit in 4-ft-diameter treated area
    Control—79.43A*
    Florel (ethephon)30.0 oz1.00B
    Olive Stop (NAA)4.0 oz.0.71B
    Olive Stop (NAA)2.5 oz3.71B
    • ↵* Means followed by the same letter are not significantly different at 5% (DMRT).

    • View popup
    Table 3.

    Comparison of foliar injury and recovery of southern live oak after treatments of fruit suppression growth regulators.

    TreatmentRate/10 galFoliage injury rating
    5/23/957/10/95
    Control—5.00A*5.00A
    Florel (ethephon)30.0 oz4.07AB4.64A
    Olive Stop (NAA)4.0 oz.3.28B3.86B
    Olive Stop (NAA)2.5 oz2.14C2.57C
    • ↵* Means followed by the same letter are not significantly different at 5% (DMRT).

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Arboriculture & Urban Forestry (AUF)
Vol. 22, Issue 2
March 1996
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Fruit Inhibition in Quercus Species Using Growth Regulators
Pam Elam, John Baker
Arboriculture & Urban Forestry (AUF) Mar 1996, 22 (2) 109-110; DOI: 10.48044/jauf.1996.016

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Fruit Inhibition in Quercus Species Using Growth Regulators
Pam Elam, John Baker
Arboriculture & Urban Forestry (AUF) Mar 1996, 22 (2) 109-110; DOI: 10.48044/jauf.1996.016
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