Cultivar Susceptibility and Environmental Parameters Affecting Symptom Expression of Red Leaf Blotch of Almond in Spain
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Author
Zazurca, Lourdes
Torguet, Laura
Zúñiga, Erick
Publication date
2021-02-12ISBN
0191-2917
Abstract
Red leaf blotch (RLB) of almond, caused by Polystigma amygdalinum, is an important foliar disease of this nut tree in the Mediterranean basin and Middle East regions. In recent years, the incidence of this disease has increased in Spain, corresponding to increases in the area of newly planted orchards and the use of susceptible cultivars. In 2009, an experimental orchard including 21 almond cultivars was planted at Les Borges Blanques, Lleida, in northeastern Spain. No fungicide treatments were applied during the 10-year experimental period (2009 to 2018) in order to allow natural disease development. Cultivar susceptibility to RLB was assessed each year, from 2011 to 2018, through visual observations of symptoms in naturally infected trees. The experimental results led us to classify the cultivars into five susceptibility groups. The most susceptible were Tarraco, Guara, Tuono, Marinada, Desmayo Largueta, and Soleta, whereas Mardía was the most tolerant. The annual incidence of disease was positively correlated with accumulated rainfall in spring, and especially in April, while it was negatively correlated with high spring and summer temperatures, especially in May. These findings could be used to improve disease management strategies by identifying the most susceptible cultivars and improving the timing of fungicide application.
Document Type
Article
Document version
Accepted version
Language
English
Subject (CDU)
632 - Plant damage, injuries. Plant diseases. Pests, organisms injurious to plants. Plant protection
Pages
36
Publisher
American Phytopathological Society
Is part of
Plant Disease
Citation
Miarnau, Xavier, Lourdes Zazurca, Laura Torguet, Erick Zúñiga, Ignasi Batlle, Simó Alegre, and Jordi Luque. 2021. “Cultivar susceptibility and environmental parameters affecting symptom expression of red leaf blotch of almond in Spain”. Plant Disease 105(4): 940-947. doi.org/10.1094/PDIS-04-20-0869-RE.
Grant agreement number
INIA-FEDER/Programa Estatal de promoción del talento y su empleabilidad en I+D+I/RTA2013-00004-C03-01/ES/Estrategias de control de enfermedades fúngicas aéreas y de raíz en frutales mediterráneos, basadas en criterios epidemiológicos y en la utilización de micorrizas arbusculares/
MINECO-FEDER/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTA2017-00084-00-00/ES/Mejora genética de variedades de almendro/
INIA-FEDER/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTA2017-00009-C04-01/ES/Estrategias de control de enfermedades fúngicas del almendro basadas en la epidemiología, en la genética de la resistencia y en las prácticas de cultivo/
INIA/Programa Estatal de I+D+I orientada a los retos de la sociedad/AGL2013-48577-C2-2-R/ES/Mejora genética del almendro/
Program
Fructicultura
Protecció Vegetal Sostenible
This item appears in the following Collection(s)
- ARTICLES CIENTÍFICS [2831]
Rights
Copyrigth © 2021 The American Phytopathological Society