Luft Albarracin E, Triapitsyn S V, Virla E G
División Control Biológico, PROIMI -Biotecnología, Av. Belgrano y Pje Caseros (T4001MVB), San Miguel de Tucumán, Tucumán, Argentina.
Entomology Research Museum, Dept of Entomology, Univ of Riverside, California, USA.
Neotrop Entomol. 2017 Dec;46(6):666-677. doi: 10.1007/s13744-017-0535-x. Epub 2017 Jun 22.
The corn leafhopper, Dalbulus maidis (DeLong), is the most important leafhopper pest of maize, Zea mays, in the Americas. A survey of the diversity of its egg parasitoids was carried out in northwestern Argentina. During summer from 2004 to 2007, the samples were collected, using sentinel eggs of D. maidis on corn leaves, exposed in 48 cornfields. Sixteen species belonging to four families of Chalcidoidea (Hymenoptera) were identified. Among the parasitoid groups, Trichogrammatidae was the most represented family with eight species, followed by Mymaridae with six species. The mymarid Anagrus incarnatus Haliday and the trichogrammatid Pseudoligosita longifrangiata (Viggiani) were the most abundant and frequent parasitoids. The mean percentage of parasitism of D. maidis eggs was 16.4% and varied greatly among the sites, ranging from 0 to 56.7%; generally, it was higher in Yungas and lower in Monte province sites. The species richness was higher in the localities within the Yungas, with 13 parasitoid species, of which two species were dominant, comprising 83.6% of the collected individuals. Monte was the province that showed the highest diversity index (H´ = 1.62). In addition, we present information on the distribution, known host associations of each parasitoid species and an identification key to all species of egg parasitoids of D. maidis in Argentina.
玉米叶蝉，即玉米达尔叶蝉（Dalbulus maidis (DeLong)），是美洲地区玉米（Zea mays）最重要的叶蝉害虫。在阿根廷西北部开展了一项关于其卵寄生蜂多样性的调查。在2004年至2007年夏季期间，利用玉米叶上的玉米达尔叶蝉哨兵卵进行样本采集，这些哨兵卵放置在48块玉米田中。共鉴定出属于小蜂总科（膜翅目）4个科的16个物种。在寄生蜂类群中，赤眼蜂科的物种数量最多，有8种，其次是缨小蜂科，有6种。缨小蜂科的肉色缨小蜂（Anagrus incarnatus Haliday）和赤眼蜂科的长缘拟寡节赤眼蜂（Pseudoligosita longifrangiata (Viggiani)）是数量最多、出现频率最高的寄生蜂。玉米达尔叶蝉卵的平均寄生率为16.4%，各地点之间差异很大，范围从0到56.7%；一般来说，永加斯地区的寄生率较高，蒙特省地区的较低。永加斯地区各地点的物种丰富度较高，有13种寄生蜂，其中两种为优势种，占采集个体的83.6%。蒙特省的多样性指数最高（H´ = 1.62）。此外，我们还提供了每种寄生蜂物种的分布信息、已知寄主关联以及阿根廷玉米达尔叶蝉所有卵寄生蜂物种的鉴定检索表。
