Wilkinson Tammy K, Landis Douglas A, Gut Larry J
Department of Entomology, Michigan State University, East Lansing, MI 48824, USA.
J Econ Entomol. 2004 Oct;97(5):1524-30. doi: 10.1603/0022-0493-97.5.1524.
The obliquebanded leafroller, Choristoneura rosaceana (Harris), is one of the major arthropod pests of apple in the United States. In 1999 and 2000, a survey of the obliquebanded leafroller parasitoid complex in commercially managed apple orchards in Michigan's two largest fruit production regions was conducted to determine the species present and their importance to obliquebanded leafroller population management. In total, 8,961 obliquebanded leafroller larvae were collected of which 2,174 were parasitized. Parasitism increased from the overwintering generation to the summer generation for both regions and both years. In 1999, 11% of the 1,126 overwintering obliquebanded leafrollers collected were parasitized, whereas 28% of the 3,669 summer generation were parasitized. In 2000, 8% of the 489 overwintering obliquebanded leafrollers collected were parasitized, whereas 26% of the 3,677 summer generation obliquebanded leafrollers collected were parasitized. In total, 20 species of hymenopteran and dipteran parasitoids from seven families were recovered from obliquebanded leafroller larvae over the course of the study. The most abundant hymenopteran parasitoids were Bassus dimidiator Nees (Braconidae) comprising 48% of the total parasitoids, followed by Colpoclypeus florus (Walker) (Eulophidae) (8% of the total) and Macrocentrus linearis (Nees) (Braconidae) (2% of the total). Dipteran parasitoids (Tachinidae) accounted for 36% of the parasitism and were largely comprised of Nilea erecta (Coquillett) (5%) and Actia interrupta Curran (13%). These collections represent new host records for B. dimidiator, Bassus annulipes (Cresson) Hyphantrophaga blanda (Osten Sacken), and Compsilura concinnata (Meigen). The parasitoid C. florus is also reported from Michigan for the first time.
苹果斜带卷蛾，即Choristoneura rosaceana（哈里斯），是美国苹果的主要节肢动物害虫之一。1999年和2000年，对密歇根州两个最大水果产区商业化管理的苹果园中苹果斜带卷蛾的寄生蜂群落进行了调查，以确定其中存在的物种及其对苹果斜带卷蛾种群管理的重要性。总共收集了8961头苹果斜带卷蛾幼虫，其中2174头被寄生。两个地区在两年中，从越冬代到夏季代，寄生率均有所上升。1999年，收集的1126头越冬苹果斜带卷蛾中有11%被寄生，而3669头夏季代中有28%被寄生。2000年，收集的489头越冬苹果斜带卷蛾中有8%被寄生，而收集的3677头夏季代苹果斜带卷蛾中有26%被寄生。在研究过程中，从苹果斜带卷蛾幼虫中共发现了来自7个科的确20种膜翅目和双翅目寄生蜂。最常见的膜翅目寄生蜂是半带巴苏斯茧蜂（Bassus dimidiator Nees，茧蜂科），占寄生蜂总数的48%，其次是弗氏褶翅小蜂（Colpoclypeus florus（沃克），釉小蜂科）（占总数的8%）和线性巨角姬蜂（Macrocentrus linearis（尼氏），茧蜂科）（占总数的2%）。双翅目寄生蜂（寄蝇科）占寄生率的36%，主要包括直立尼罗寄蝇（Nilea erecta（科基利特））（5%）和间断阿克寄蝇（Actia interrupta Curran）（13%）。这些收集结果代表了半带巴苏斯茧蜂、环带巴苏斯茧蜂（Bassus annulipes（克雷森））、淡色肥须寄蝇（Hyphantrophaga blanda（奥斯坦·萨克恩））和康辛合蚤蝇（Compsilura concinnata（梅根））的新宿主记录。寄生蜂弗氏褶翅小蜂也是首次在密歇根州被报道。
