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IUFRO Conference
of the WP2.08.03 on Silviculture and Improvement of Eucalypts,
2004
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4208 |
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Control measures performed on eucalyptus pests
Pérez Otero, Rosa & Mansilla Vázquez, J. Pedro
Estación Fitopatolóxica do Areeiro, Excma.
Diputación Provincial de Pontevedra, Subida a la Robleda s/n, 36153
Pontevedra, España.
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ABSTRACT: Control measures
were initiated when Gonipterus scutellatus Gyll. was first detected in
Galicia. This Coleoptera species feeds on young and tender leaves, but when
high densities of population appear they also feed on shoots, whose development
is inhibited or impeded. The biological control of this pest is performed by
releasing Hymenoptera (Mymaridae) Anaphens nitens H. an egg parasitoid
of the weevil, being this efficient in the control of Gonipterus
scutellatus Gyll. populations in other countries. The results obtained with
the parasitoid of Gonipterus scutellatus Gyll. were successful since
1996, when the control program was initiated. However, the effects of this
control method were not enough to achieve a short-term control of Gonipterus
scutellatus Gyll in highly affected stands. Thus, in these areas there is a
need of adoption of complementary measures of control as the use of IGR
flufenoxuron (registered in Spain), which proved to be not harmful for
Anaphens nitens H. Adopting integrated and biological control measures
on another pests was not necessary, but as the new pest Ctenarytaina
spatulata is spreading in a year, this option should be considered. .
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