保加利亚白杨(Populus tremula L.)上的Saperda populnea(L.)(鞘翅目:角蚧科)寄生蜂

G. Georgiev
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引用次数: 0

摘要

1997年在保加利亚对Saperda populnea(L.)(Col.:Cerambycidae)的寄生蜂进行了研究 – 2001年。从八个地点(索非亚、科卡利安、普莱纳、丘雷克、戈尔尼-洛姆、金兹、多尔诺·卡马尔齐和克利苏拉)的年轻白杨树上采集带有害虫幼虫的高尔,并在实验室条件下进行检查。从1118个含有越冬害虫幼虫的五倍子中饲养了四个物种:假盾叶虫(Scop.)(Hym.:Braconidae)、白杨白腹蛛(Ratz。所有的寄生蜂都是孤立的。在保加利亚发现了一种新的寄主寄生蜂。水刺B.irrorata主要由杨幼虫后期产生;早期和中期幼虫的剩余物种。在杨寄生蜂复合体中,数量最多的是伊氏B.irrorata(59.8 %) 和D.populneus(29.4 %). 寄主幼虫寄生率为2.4~33.3,平均9.7 %. irrorata是减少害虫数量的最重要因素。塔西尼引起的民粹主义链球菌的平均死亡率为5.8 %, 个体研究中观察到的最高死亡率为20.2 %.
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Parasitoids of Saperda populnea (L.) (Coleoptera: Cerambycidae) on aspen (Populus tremula L.) in Bulgaria

The parasitoids of Saperda populnea (L.) (Col.: Cerambycidae) were studied in Bulgaria during the period 1997 – 2001. Galls with pest larvae were collected from young aspen trees at eight locations (Sofia, Kokaliane, Plana, Churek, Gorni Lom, Gintzi, Dolno Kamartzi and Klisura) and examined under laboratory conditions. Four species were reared from 1118 galls containing overwintering pest larvae: Iphiaulax impostor (Scop.) (Hym.: Braconidae), Dolichomitus populneus (Ratz.), Schreineria populnea (Gir.) (Hym.: Ichneumonidae) and Billaea irrorata (Meig.) (Dipt.: Tachinidae). All of the parasitoids were solitary. Schreineria populnea was found as a new parasitoid of the host in Bulgaria. B. irrorata emerged mainly from late-stage S. populnea larvae; the remaining species from both early- and mid-stage larvae. In the parasitoid complex of S. populnea, the most numerous were B. irrorata (59.8 %) and D. populneus (29.4 %). The percentage of host larval parasitism varied from 2.4 to 33.3, with an average of 9.7 %. B. irrorata was the most important in reducing the pest number. The average mortality of S. populnea caused by the tachinid was 5.8 %, and the highest mortality observed in individual study was 20.2 %.

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