New spread areas of invasive species chestnut gall wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae).
Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae), which was detected in Yalova for the first time in our country in 2014, continued to spread in the chestnut areas during the time passed. Although the efforts to control the chesnut gal wasp, which has become the most important pest of chestnut, continue, there are also findings that the pest has been seen in our other provinces over time. Finally, the galls of the pest were detected in the surveys conducted in Zonguldak and Bartın provinces. Management studies should be started as soon as possible with the pest in its limited distribution in these provinces.