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IUFRO Conference
of the WP2.08.03 on Silviculture and Improvement of Eucalypts, 2004
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4210 |
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Main
pests introduced in Galicia affecting eucalyptus trees
Estación Fitopatolóxica do Areeiro, Excma.
Diputación Provincial de Pontevedra, Subida a la Robleda s/n, 36153
Pontevedra, España.
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ABSTRACT: Eucalyptus is the
non-native forest species which presents the largest distribution in Galician
forests. Its spread was favoured by its easy adaptation to a wide range of
conditions and because it had not been subjected to pests or diseases that
could affect its development for several years after its introduction. However,
in the 70's the first pest reported on eucalyptus, the psyllid Ctenarytaina
eucalypti Mask, was detected producing no important damage on stands, but
during certain seasons high densities of population occur. Ten years later the
xylophagous Phoracantha semipunctata F. is detected but causing no
important damage due to the climatic conditions of the region, being its damage
more important in hotter regions in Southern Spain. The eucalyptus snout beetle
Gonipterus scutellatus Gyll. was found in 1991 and was reported to show
voracity and to have a rapid widespread dissemination. When control measures
were performed the damages caused by the snout weevil had already been
apparent. It mainly produced a growth inhibition of eucalyptus trees growing in
harsh conditions (high altitudes, shallow soils). Our last report about pests
on eucalyptus was a new psyllid, Ctenarytaina spatulata Taylor, whose
importance is still unknown.
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