Chestnut Gall Wasp
RISK OF SPREAD OF A NEW
Finding of the chestnut gall wasp (Dryocosmus
kuryphilus), a new and dangerous pest of chectnut, was confirmed for the
first time in Slovenia on 17 June 2005. The pest was introduced into
Slovenia by means of plants for planting originating in Piemonte, Italy,
which is the first chestnut area attacked by chestnut gall wasp in
Europe. In 2005, phytosanitary and forestry service managed to trace a
half of the imported plants for planting. The attack was confirmed on
4 locations (see
locations - November 2006
Damage caused by the chestnut gall wasp is made by
drilling vegetative buds and formation of galls on shoots which die.
This can gradually result in tree mortality. Plantations for fruit
production (maroni) may suffer a 50-70 % loss. In forests, it causes the
most substantial damage on young plants and by reducing the production
of fruit and wood.
In 2006 larvae of chestnut gall wasp in galls may
occur in May or June when a great threat is posed by adults to emerge
from the galls and fly to lay eggs and thus infest cultivated and forest
Administration RS calls upon all chectnut breeders who bought plants for
planting in 2004 (in autumn), 2005 (in spring) or 2006 wherever in
Slovenia and planted these, to provide for their thorough and immediate
In the case of a thickening
of any kind on shoots or leaf veins of this year, official service
should be immediately informed thereof on the telephone no.
++386 41 354 405, ++386
1 309 4379 or on e-mail address: firstname.lastname@example.org.
sortna lista 2011
Društvo za varstvo rastlin