Abstract

The emerald ash borer is a serious pest of ash (Fraxinus spp.) in North America and European Russia. It was introduced to those territories from East Asia in the 1990s. Currently the pest has spread in 12 regions of European Russia. The northwestern border of its range is in the city of Tver. This poses a potential threat to ash trees of St. Petersburg and Western Europe. In 2016 and 2018, green ash trees were surveyed in the summer in several districts of Tver. There are only local foci of the emerald ash borer in the city; mass drying of ash trees is not observed. A species that accompanies the emerald ash borer (the jewel ash beetle Agrilus convexicollis) and a pest parasitoid (Spathius polonicus) were found. Both species are recorded for Tver region for the first time. In addition, parasitoid Coeloides sp. was found inside the bark beetle galleries.

中文翻译：

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特维尔（Tver）的翡翠灰Bor钻Agrilus planipennis Fairmaire（鞘翅目：Buprestidae）的焦点位于入侵范围的西北边界

摘要

翡翠灰bore虫是北美和欧洲俄罗斯的一种严重的灰烬害虫（Fraxinus spp。）。它是在1990年代从东亚引入这些领土的。目前，该害虫已扩散到欧洲俄罗斯的12个地区。其范围的西北边界在特维尔市。这对圣彼得堡和西欧的白蜡树构成了潜在威胁。在2016年和2018年，夏季对特维尔几个地区的绿灰树进行了调查。这个城市只有本地的翡翠bore虫病灶。没有观察到灰树的大量干燥。伴随白蜡窄吉丁（宝石灰甲虫甲物种花曲柳窄convexicollis）和害虫寄生（白蜡polonicus） 被发现。这两个物种都首次记录在特维尔地区。此外，寄生蜂腔肠菌。被发现在树皮甲虫画廊内。