Research Article

Occurrence of Syntomopus parisii (Hymenoptera: Pteromalidae) parasitizing Melanagromyza sojae (Diptera: Agromyzidae) in Brazil and Paraguay


Soybean stem fly (SSF), Melanagromyza sojae is an important pest in soybean growing regions of the Old World, and recently has been confirmed in soybean areas in Brazil, Paraguay and Bolivia. In the regions where it is endemic, the management of M. sojae is performed by using resistant varieties, chemical insecticides and natural control carried out by parasitoids. One of the main parasitoid species of M. sojae, responsible for high parasitism rates is Syntomopus parisii (Hymenoptera: Pteromalidae). This paper confirms the presence of S. parisii parasitizing pupae of SSF in Brazil and Paraguay, using morphological descriptions. In addition, we provide, for the first time, genetic information on S. parisii specimens, based on the fragment of Cytochrome Oxidase I gene, which indicated low genetic diversity of S. parisii collected in Brazil and Paraguay.