Apple burrknots involved in trunk canker initiation and dying of young trees

Conditions associated with an unusually high occurrence of burrknots in two young commercial apple orchards at two locations, Tesetice and Stosikovice, South Moravia, Czech Republic, were analysed. The occurrence of burrknot was evaluated on trees of cvs. Early Smith, Jonagold and Gala on M.9 rootst...

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Published in:Plant protection science 2009, Vol.45 (1), p.1-11
Main Authors: Kudela, V.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic), Krejzar, V.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic), Kundu, J.K.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic), Pankova, I.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic), Ackermann, P.,Statni Rostlinolekarska Sprava, Brno (Czech Republic)
Format: Article
Language:English
Subjects:
Apple stem grooving virus
apple tree
APPLES
ARBOLES FRUTALES
ARBRE FRUITIER
asgv
aspv
Bark
Blight
burrknot
Canker
CANKERS
CHANCRE
Cultivars
ENFERMEDADES DE LAS PLANTAS
ERWINIA AMYLOVORA
FRUIT TREES
Fruits
http://www.fao.org/aos/agrovoc#c_1251
http://www.fao.org/aos/agrovoc#c_24747
http://www.fao.org/aos/agrovoc#c_3128
http://www.fao.org/aos/agrovoc#c_4555
http://www.fao.org/aos/agrovoc#c_541
http://www.fao.org/aos/agrovoc#c_5844
http://www.fao.org/aos/agrovoc#c_5962
http://www.fao.org/aos/agrovoc#c_6653
http://www.fao.org/aos/agrovoc#c_7566
http://www.fao.org/aos/agrovoc#c_8260
m.9 rootstock
MALADIE DES PLANTES
Malus
MALUS PUMILA
MANZANA
NECROSIS CANCEROSA
Oomycetes
Orchards
PHYTOPHTHORA
PLANT DISEASES
Planting
POMME
PORTAINJERTOS
PORTE GREFFE
Propagation
root-suckers
ROOTSTOCKS
SINTOMAS
Statistical analysis
Stem pitting
Stems
SYMPTOME
SYMPTOMS
Tree planting
Trees
trunk canker
VIROSE
VIROSES
VIROSIS
Viruses
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Summary:Conditions associated with an unusually high occurrence of burrknots in two young commercial apple orchards at two locations, Tesetice and Stosikovice, South Moravia, Czech Republic, were analysed. The occurrence of burrknot was evaluated on trees of cvs. Early Smith, Jonagold and Gala on M.9 rootstock in the first orchard (planted in spring 2003) and on trees of cv. Gala on M.9 rootstock in the second orchard (planted in autumn 2002). The incidence of burrknots in cvs. Early Smith, Jonagold and Gala trees was 98, 97 and 92%, respectively. The burrknot severity was significantly higher on Jonagold trees than on the other two cultivars. In the second orchard, symptoms of burrknot appeared on 73.3% of trees planted on a slight slope and on 70.0% of trees planted on a plane. Correlations between burrknot number and number of root-suckers were not statistically significant. Five years after the tree planting, increased dying of Jonagold trees (5.5%) was recorded at Tesetice. The stem associated apple tree viruses Apple stem pitting virus (ASPV) and Apple stem grooving virus (ASGV) were detected frequently in the rootstock and scion parts of cvs. Jonagold and Early Smith and less frequently in Gala cultivar. The virus positive trees included individuals both with various burrknot severity and without symptoms of burrknots. There were no correlations between the incidence of burrknots and the presence of ASPV and ASGV.
ISSN:1212-2580
1805-9341
DOI:10.17221/38/2008-pps