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III
International Chestnut Congress, 2004
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579 |
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Incidence and vegetative compatibility types of Cryphonectria
parasitica on chestnut trees in Castilla-León
(Spain).
J.P. Mansilla¹, O.
Aguín¹, C. Pintos¹, A.B. Martín² and J.M. Sierra,
A. Romero²
1 Estación Fitopatolóxica do
Areeiro, Excma. Diputación Provincial de Pontevedra, Subida a la Robleda
s/n, 36153 Pontevedra, España.
2 Dirección Xeral de Montes e
Medio Ambiente,Consellería de Medio Ambiente, Xunta de Galicia, Santiago
de Compostela, España.
3 Servicio de Protección de la
Naturaleza, Junta de Castilla-León, E-47071 Valladolid, Spain
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ABSTRACT: The incidence and
distribution of chestnut blight, caused by Cryphonectria parasitica, on
forest stands in three provinces of Castilla-León (Burgos, León
and Zamora) during 2003 and 2004, has been studied. Cryphonectria
parasitica isolates were paired in all combinations to determine their
distribution in vegetative compatibility groups (VC). In order to detect
hypovirulent strains of the pathogen, the virulence of the isolates was
analyzed Cryphonectria parasitica was found in 91% of the bark samples
and 239 isolates were obtained. Eight vegetative compatibility types (VC) were
determined. Most isolates (80%) presented the same compatibility group, which
was compatible with the European type EU-1. The current situation of C.
parasitica, high incidence and low diversity, is adequate to develop a
chestnut blight biological control programme in the Castilla-León
region.
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