High-density ‘Spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour

Fire blight, caused by Erwinia amylovora, is a severe disease of pear (Pyrus communis). Highly vigorous trees are more sensitive to E. amylovora damage after summer pruning. Trees grown in high-density orchards have lower vigour than those in low-density orchards, reducing required inputs for prunin...

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Autores principales:	Mery Dafny-Yelin, Jehudith Clara Moy, Raphael A. Stern, Israel Doron, Miriam Silberstein, Daphna Michaeli
Formato:	article
Lenguaje:	EN
Publicado:	Firenze University Press 2021
Materias:	Erwinia amylovora fire blight high-density orchard Pyrus communis Botany QK1-989
Acceso en línea:	https://doaj.org/article/35ffaf73dbe343479e75ec5af7fac31f
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spelling	oai:doaj.org-article:35ffaf73dbe343479e75ec5af7fac31f2021-11-16T09:30:29ZHigh-density ‘Spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour10.36253/phyto-128470031-94651593-2095https://doaj.org/article/35ffaf73dbe343479e75ec5af7fac31f2021-11-01T00:00:00Zhttps://oajournals.fupress.net/index.php/pm/article/view/12847https://doaj.org/toc/0031-9465https://doaj.org/toc/1593-2095Fire blight, caused by Erwinia amylovora, is a severe disease of pear (Pyrus communis). Highly vigorous trees are more sensitive to E. amylovora damage after summer pruning. Trees grown in high-density orchards have lower vigour than those in low-density orchards, reducing required inputs for pruning and tying, and increasing per hectare yields orchard profitability. Tree damage due to fire blight was assessed in high-density pear orchards vs. the common Israeli low-density orchards. Pear trees were planted at high densities using the spindle system (2500 trees ha-1 for ‘Spadona’ and 1250 trees ha-1 for ‘Coscia’), or at low density (1000 trees ha-1) using palmeta (’Spadona’) or open vase (‘Coscia’) systems. Four years after planting, both orchards were similarly infected with fire blight (11–50 infected blossoms per tree), but 1 year after infection, trees in the high density orchard had blossoms infections in the main limbs or trunk bases compared to the low-density orchard. At 3 years after initial infection, no trees had died in the high density orchard, whereas in the low density ‘Spadona’ orchard, 10% of the trees were wilted. For the more tolerant ‘Coscia’, infection did not progress at either orchard density. These results indicate that in fire blight-susceptible pear cultivars, a high density planting system, associated with reduced tree vigour, presents a decreased risk of fire blight damage. Mery Dafny-YelinJehudith Clara MoyRaphael A. SternIsrael DoronMiriam SilbersteinDaphna MichaeliFirenze University PressarticleErwinia amylovorafire blighthigh-density orchardPyrus communisBotanyQK1-989ENPhytopathologia Mediterranea, Vol 60, Iss 3 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Erwinia amylovora fire blight high-density orchard Pyrus communis Botany QK1-989
spellingShingle	Erwinia amylovora fire blight high-density orchard Pyrus communis Botany QK1-989 Mery Dafny-Yelin Jehudith Clara Moy Raphael A. Stern Israel Doron Miriam Silberstein Daphna Michaeli High-density ‘Spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour
description	Fire blight, caused by Erwinia amylovora, is a severe disease of pear (Pyrus communis). Highly vigorous trees are more sensitive to E. amylovora damage after summer pruning. Trees grown in high-density orchards have lower vigour than those in low-density orchards, reducing required inputs for pruning and tying, and increasing per hectare yields orchard profitability. Tree damage due to fire blight was assessed in high-density pear orchards vs. the common Israeli low-density orchards. Pear trees were planted at high densities using the spindle system (2500 trees ha-1 for ‘Spadona’ and 1250 trees ha-1 for ‘Coscia’), or at low density (1000 trees ha-1) using palmeta (’Spadona’) or open vase (‘Coscia’) systems. Four years after planting, both orchards were similarly infected with fire blight (11–50 infected blossoms per tree), but 1 year after infection, trees in the high density orchard had blossoms infections in the main limbs or trunk bases compared to the low-density orchard. At 3 years after initial infection, no trees had died in the high density orchard, whereas in the low density ‘Spadona’ orchard, 10% of the trees were wilted. For the more tolerant ‘Coscia’, infection did not progress at either orchard density. These results indicate that in fire blight-susceptible pear cultivars, a high density planting system, associated with reduced tree vigour, presents a decreased risk of fire blight damage.
format	article
author	Mery Dafny-Yelin Jehudith Clara Moy Raphael A. Stern Israel Doron Miriam Silberstein Daphna Michaeli
author_facet	Mery Dafny-Yelin Jehudith Clara Moy Raphael A. Stern Israel Doron Miriam Silberstein Daphna Michaeli
author_sort	Mery Dafny-Yelin
title	High-density ‘Spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour
title_short	High-density ‘Spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour
title_full	High-density ‘Spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour
title_fullStr	High-density ‘Spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour
title_full_unstemmed	High-density ‘Spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour
title_sort	high-density ‘spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour
publisher	Firenze University Press
publishDate	2021
url	https://doaj.org/article/35ffaf73dbe343479e75ec5af7fac31f
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High-density ‘Spadona’ pear orchard shows reduced tree sensitivity to fire blight damage due to decreased tree vigour

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