Strategies to control tree vigour and optimise fruit production in 'Conference' pears

F.M. Maas

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    10 Citations (Scopus)

    Abstract

    The ban on the use of chlormequat (CCC) in pear orchards in 2001 forced Dutch pear growers to look for alternative methods to control tree vigour and stimulate flower bud development and fruit production. Root pruning and trunk notching have become the major growth retarding methods. In addition to the mechanical methods for controlling tree vigour, Regalis (Prohexadione-Calcium) and ethephon were tested as alternative chemical growth regulators for 'Conference' pears. In 2004, a trial was started in which six different strategies to control tree vigour and optimize fruit production in 'Conference' trees are compared. In 4 strategies root pruning was the major treatment, while in 2 strategies trunk incisions were the initial treatment to reduce tree vigour and stimulate fruit production. In 2005, no further root pruning or trunk incisions were made and ethephon and Regalis were the only treatments applied in some of the strategies. Ethephon and Regalis were also applied in 2006 in addition to root pruning in March and June or in June only. All of the strategies evaluated significantly reduced shoot growth and improved fruit production. Regular yields of 52 to more than 70 tons/ha were achieved for 3 consecutive years. So far, ethephon and Regalis have shown no or only minor additional beneficial effects compared to root pruning or trunk incision followed by root pruning in the years thereafter. Flowering, fruit yield and fruit quality of 'Conference' pears produced using the different strategies are presented and discussed.
    LanguageEnglish
    Title of host publicationISHS X International Pear Symposium, Peniche, Portugal
    EditorsA.D. Webster, C.M. Oliveira
    Place of PublicationLeuven
    PublisherISHS
    Pages139-146
    Volume800
    ISBN (Print)9789066056114
    DOIs
    Publication statusPublished - 2008
    EventISHS X International Pear Symposium 2007 - Peniche, Portugal
    Duration: 22 May 200726 May 2007

    Conference

    ConferenceISHS X International Pear Symposium 2007
    CountryPortugal
    CityPeniche
    Period22/05/0726/05/07

    Fingerprint

    fruit growing
    pruning
    pears
    vigor
    ethephon
    tree trunk
    chlormequat
    growth regulators
    fruit yield
    fruit quality
    growers
    orchards
    buds
    methodology
    flowering
    shoots

    Cite this

    Maas, F. M. (2008). Strategies to control tree vigour and optimise fruit production in 'Conference' pears. In A. D. Webster, & C. M. Oliveira (Eds.), ISHS X International Pear Symposium, Peniche, Portugal (Vol. 800, pp. 139-146). Leuven: ISHS. https://doi.org/10.17660/ActaHortic.2008.800.12
    Maas, F.M. / Strategies to control tree vigour and optimise fruit production in 'Conference' pears. ISHS X International Pear Symposium, Peniche, Portugal. editor / A.D. Webster ; C.M. Oliveira. Vol. 800 Leuven : ISHS, 2008. pp. 139-146
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    title = "Strategies to control tree vigour and optimise fruit production in 'Conference' pears",
    abstract = "The ban on the use of chlormequat (CCC) in pear orchards in 2001 forced Dutch pear growers to look for alternative methods to control tree vigour and stimulate flower bud development and fruit production. Root pruning and trunk notching have become the major growth retarding methods. In addition to the mechanical methods for controlling tree vigour, Regalis (Prohexadione-Calcium) and ethephon were tested as alternative chemical growth regulators for 'Conference' pears. In 2004, a trial was started in which six different strategies to control tree vigour and optimize fruit production in 'Conference' trees are compared. In 4 strategies root pruning was the major treatment, while in 2 strategies trunk incisions were the initial treatment to reduce tree vigour and stimulate fruit production. In 2005, no further root pruning or trunk incisions were made and ethephon and Regalis were the only treatments applied in some of the strategies. Ethephon and Regalis were also applied in 2006 in addition to root pruning in March and June or in June only. All of the strategies evaluated significantly reduced shoot growth and improved fruit production. Regular yields of 52 to more than 70 tons/ha were achieved for 3 consecutive years. So far, ethephon and Regalis have shown no or only minor additional beneficial effects compared to root pruning or trunk incision followed by root pruning in the years thereafter. Flowering, fruit yield and fruit quality of 'Conference' pears produced using the different strategies are presented and discussed.",
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    Maas, FM 2008, Strategies to control tree vigour and optimise fruit production in 'Conference' pears. in AD Webster & CM Oliveira (eds), ISHS X International Pear Symposium, Peniche, Portugal. vol. 800, ISHS, Leuven, pp. 139-146, ISHS X International Pear Symposium 2007, Peniche, Portugal, 22/05/07. https://doi.org/10.17660/ActaHortic.2008.800.12

    Strategies to control tree vigour and optimise fruit production in 'Conference' pears. / Maas, F.M.

    ISHS X International Pear Symposium, Peniche, Portugal. ed. / A.D. Webster; C.M. Oliveira. Vol. 800 Leuven : ISHS, 2008. p. 139-146.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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    AU - Maas, F.M.

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    N2 - The ban on the use of chlormequat (CCC) in pear orchards in 2001 forced Dutch pear growers to look for alternative methods to control tree vigour and stimulate flower bud development and fruit production. Root pruning and trunk notching have become the major growth retarding methods. In addition to the mechanical methods for controlling tree vigour, Regalis (Prohexadione-Calcium) and ethephon were tested as alternative chemical growth regulators for 'Conference' pears. In 2004, a trial was started in which six different strategies to control tree vigour and optimize fruit production in 'Conference' trees are compared. In 4 strategies root pruning was the major treatment, while in 2 strategies trunk incisions were the initial treatment to reduce tree vigour and stimulate fruit production. In 2005, no further root pruning or trunk incisions were made and ethephon and Regalis were the only treatments applied in some of the strategies. Ethephon and Regalis were also applied in 2006 in addition to root pruning in March and June or in June only. All of the strategies evaluated significantly reduced shoot growth and improved fruit production. Regular yields of 52 to more than 70 tons/ha were achieved for 3 consecutive years. So far, ethephon and Regalis have shown no or only minor additional beneficial effects compared to root pruning or trunk incision followed by root pruning in the years thereafter. Flowering, fruit yield and fruit quality of 'Conference' pears produced using the different strategies are presented and discussed.

    AB - The ban on the use of chlormequat (CCC) in pear orchards in 2001 forced Dutch pear growers to look for alternative methods to control tree vigour and stimulate flower bud development and fruit production. Root pruning and trunk notching have become the major growth retarding methods. In addition to the mechanical methods for controlling tree vigour, Regalis (Prohexadione-Calcium) and ethephon were tested as alternative chemical growth regulators for 'Conference' pears. In 2004, a trial was started in which six different strategies to control tree vigour and optimize fruit production in 'Conference' trees are compared. In 4 strategies root pruning was the major treatment, while in 2 strategies trunk incisions were the initial treatment to reduce tree vigour and stimulate fruit production. In 2005, no further root pruning or trunk incisions were made and ethephon and Regalis were the only treatments applied in some of the strategies. Ethephon and Regalis were also applied in 2006 in addition to root pruning in March and June or in June only. All of the strategies evaluated significantly reduced shoot growth and improved fruit production. Regular yields of 52 to more than 70 tons/ha were achieved for 3 consecutive years. So far, ethephon and Regalis have shown no or only minor additional beneficial effects compared to root pruning or trunk incision followed by root pruning in the years thereafter. Flowering, fruit yield and fruit quality of 'Conference' pears produced using the different strategies are presented and discussed.

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    M3 - Conference contribution

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    VL - 800

    SP - 139

    EP - 146

    BT - ISHS X International Pear Symposium, Peniche, Portugal

    A2 - Webster, A.D.

    A2 - Oliveira, C.M.

    PB - ISHS

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    Maas FM. Strategies to control tree vigour and optimise fruit production in 'Conference' pears. In Webster AD, Oliveira CM, editors, ISHS X International Pear Symposium, Peniche, Portugal. Vol. 800. Leuven: ISHS. 2008. p. 139-146 https://doi.org/10.17660/ActaHortic.2008.800.12