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Reunión
Anual del Grupo de Trabajo de Forestales, parques y Jardines, Logroño
2004
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4206 |
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Distribución de los tipos de compatibilidad vegetativa de
Cryphonectria parasitica (Murrill) Barr en castaños de
Castilla-León
AGUÍN, O.¹;
MANSILLA, J.P.¹ ; MATA, M.¹ ; SIERRA J. M.² ; MARTÍN A.
B²
1 Estación Fitopatolóxica do Areeiro,
Excma. Diputación Provincial de Pontevedra, Subida a la Robleda s/n,
36153 Pontevedra, España. www.efa-dip.org
2 Centro de Sanidad
Forestal de Calabazanos. Consejería de Medio Ambiente. Junta de
Castilla-León. Polígono Industrial de Villamuriel, s/n.
Villamuriel de Cerrato, 34190 Palencia. : sanidad.forestal@jcyl.es
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ABSTRACT: Chestnut blight is one of the most severe
diseases affecting chestnut and is caused by Cryphonectria (Endothia)
parasitica (Murrill) Barr. The severity of damage caused by this pathogen,
so studies on the adequate method to control the disease have been initiated.
In the last years studies have been focused in biological control using C.
parasitica hypovirulent strains, that contain a dsRNA virus, less
pathogenic and that can transmit their effect to virulent strains, causing
spontaneous wound healing of the cankers (GRENTE, 1965). The vegetative
compatibility among strains of this fungus is one of the main factors affecting
natural dissemination of the hypovirus and that influences in the success of
the biological control of chestnut blight (MILGROOM et al., 1996; CORTESI et
al., 1998). To convert a virulent strain into hypovirulent, both must belong to
the same compatibility type; this process will be more efficient if
hypovirulent strains obtained spontaneously in the area where the control will
be performed (MANSILLA et al., 2000). The lower number of compatibility types
there are in the area, the more effective will be the control based in
hypovirulence, as it was shown in France (GRENTE y BERTHELAY-SAURET, 1978) and
Italy (BISIACH et al., 1995).
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