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Forests 2016, 7(9), 190;

Strategies to Combat Mycosphaerella Leaf Disease in Eucalyptus globulus Plantations in Northern Spain

Faculty of Industrial and Telecommunications Engineering, Electrical and Energy Engineering Department, University of Cantabria, Avenida de Los Castros, Santander 39005, Spain
Bosques 2000 S.L. Grupo Sniace, Ganzo, Torrelavega 39300, Spain
Author to whom correspondence should be addressed.
Academic Editors: Reynaldo Campos Santana and Eric J. Jokela
Received: 30 May 2016 / Revised: 8 August 2016 / Accepted: 18 August 2016 / Published: 29 August 2016
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Eucalyptus globulus is widely planted in temperate regions to produce pulp for its high performance but few studies of the impact of Mycosphaerella Leaf Disease (MLD) have been documented. This study aimed to explore and provide knowledge on disease in the management of young Eucalyptus globulus stands in the north of Spain. The influences of subspecies, cloning, and fertilization on the degree of severity of the disease were analyzed. The study was conducted with different material plants of Eucalyptus globulus, of Australian origin, from other sources, open-pollinated families, clones, and families of controlled pollination. Each series tested different vegetal material, except for a number of control codes that were used as reference samples for MLD evaluation. Severity, height at which foliage changes from juvenile to adult, total height, and volume were all measured. There were significant correlations in the average MLD severity of families and provenances obtained from the different trials. ANOVA revealed important differences between subspecies of E. globulus. A correlation was found between the percentage of adult leaf and the severity. There were differences in the impact of MLD between plant material non-selected and selected by its tolerance (p < 0.0001). There was a significant effect on the severity between mature cuttings and families from seed non-selected in their tolerance to MLD. Their tolerance was lower than that achieved from seed selected by its tolerance to MLD. Genetic selection was shown as the best strategy since there are individuals exceptionally tolerant to MLD. View Full-Text
Keywords: pollination; clone; foliage; fertilization; severity; Crown Damage Index pollination; clone; foliage; fertilization; severity; Crown Damage Index

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Pérez, S.; Renedo, C.; Ortiz, A.; Ortiz, F.; Tejedor, C. Strategies to Combat Mycosphaerella Leaf Disease in Eucalyptus globulus Plantations in Northern Spain. Forests 2016, 7, 190.

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