Dryocosmus kuriphilus pdf merge

A new distribution map is provided for dryocosmus kuriphilus yasumatsu. It affects castanea including sweet chestnut, causing galling on leaves, twigs and petioles inhibiting leaf function, which can weaken the tree, reducing nut production and making it. Occurrence of oriental chestnut gall wasp dryocosmus kuriphilus. Classical biological control against the chestnut gall wasp dryocosmus kuriphilus hymenoptera, cynipidae in france. Presence and degree of infestation of dryocosmus kuriphilus in switzerland. Early instar larvae overwinter inside chestnut buds. Dryocosmus kuriphilus european and mediterranean plant.

Abstract background the asian chestnut gall wasp acgw dryocosmus kuriphilus yasumatsu is the most severe pest of the genus. Torymus sinensis against the chestnut gall wasp dryocosmus. Dryocosmus kuriphilus dryckuoverview eppo global database. The use of torymus sinensis against dryocosmus kuriphilus. We propose to combine laboratory and field experiments to answer. No significant relationships between the number of emerged t. Dryocosmus kuriphilus is a species of gall wasp known by the common names chestnut gall wasp, oriental chestnut gall wasp, and asian chestnut gall wasp. Symptoms top of page galls are unilocular or multilocular, 520 mm in diameter, green or rosecoloured, often containing portions of developing leaves, stems and petioles. They develop on young twigs, on leaf petioles or on the midrib of the leaves. Establishment and long distance spread to non release sites. The wasp is native to asia, and has been introduced to continental europe. Classical biological control against the chestnut gall. Dryocosmus kuriphilus is considered as one of the major.

Pdf assessing the impact of dryocosmus kuriphilus on the. Biological control of invasive dryocosmus kuriphilus with. General information about dryocosmus kuriphilus drycku eppo global database. Cab international workshop on building biosecurity planning and surveillance capacity for apec member economies kuala lumpur, malaysia 15. Fusionner pdf combinez des fichiers pdf gratuitement en ligne. After adult emergence, the gall dries, becomes woodlike, and remains attached to the tree for up to 2 years. Pdf biological control of invasive dryocosmus kuriphilus. Threat identification and pathway analysis submitted by. In june 2015 the first finding of dryocosmus kuriphilus oriental chestnut gall wasp in the uk was confirmed, in a kent woodland. Pdf rearing, release and settlement prospect in italy of torymus.

Survey native parasitoids parasitizing dryocosmus kuriphilus galls in mixed. Dryocosmus kuriphilus infestation rates in 2009 in southern ticino. At the time of bud burst in spring, the adults emerge to induce the formation of 520 mm diameter green or rose. Une fois vos fichiers pdf charges dans notre systeme, vous pouvez en changer l ordre. In europe it is considered as the most harmful insect pest on castanea sativa.