Diversity, seasonality, and egg parasitism of hemipteran (Coreidae and Pentatomidae) from a cowpea crop in northeastern Brazil
Keywords:
egg parasitoid, biological control, Chalcidoidea, Platygastroidea, HeteropteraAbstract
We report here on the diversity and composition of Coreidae and Pentatomidae species, as well as their egg parasitoids collected on cowpea (Vigna unguiculata [L.] Walp) (Fabaceae) plants from a field in Teresina, central-northern Piauí State, Brazil. Weekly sweep net sampling was performed during the phenological cycle of this crop in the rainy and dry seasons. In the pentatomid collections, 14 species were identified from 3 subfamilies (Asopinae, Edessinae, and Pentatominae). Five species of Coreidae also were collected from the subfamily Coreinae. We found that Euschistus heros (F.), Crinocerus sanctus (F.), Chinavia ubica (Rolston), and Piezodorus guildinii (Westwood) (all Hemiptera: Pentatomidae) were the most abundant hemipteran species associated with cowpea. Generally, species richness and diversity of individuals from this order were higher in the rainy season than in the dry season. The parasitoid species identified from field-collected hemipteran egg masses were: Anastatus coreophagus Ashmead (Hymenoptera: Eupelmidae), Neorileya flavipes Ashmead (Hymenoptera: Eurytomidae), Ooencyrtus anasae (Ashmead) (Hymenoptera: Encyrtidae), O. submetallicus (Howard) (Hymenoptera: Encyrtidae), and Trissolcus urichi (Crawford) (Hymenoptera: Platygastridae). We found that about 52% of hemipteran egg masses collected from the cowpea field were naturally parasitized by the above parasitoids, whereas nearly 10% of C. sanctus and C. ubica sentinel egg masses were parasitized.
Resumen
Se informa sobre la diversidad y composición de especies de Coreidae y Pentatomidae, así como de los parasitoides de sus huevos recolectados en plantas de caupí (Vigna unguiculata [L.] Walp) de un campo en Teresina, en el norte central del estado de Piauí, Brasil. Se realizó un muestreo semanal con redes de barrido durante el ciclo fenológico de este cultivo en la estación lluviosa y la estación seca. En las colecciones de pentatomidos, se identificaron 14 especies de 3 subfamilias (Asopinae, Edessinae y Pentatominae). También, se recolectaron cinco especies de Coreidae de la subfamilia Coreinae. Encontramos que Euschistus heros (F.), Crinocerus sanctus (F.), Chinavia ubicando (Rolston) y Piezodorus guildinii (Westwood) fueron las especies de hemípteros más abundantes asociadas con el caupí. En general, la riqueza de especies y la diversidad de individuos de este orden fueron mayores en la estación lluviosa que en la seca. Las especies de parasitoides identificadas a partir de las masas de huevos de hemípteros recolectados en el campo fueron: Anastatus coreophagus Ashmead, Neorileya flavipes Ashmead, Ooencyrtus anasae (Ashmead), O. submetallicus (Howard) y Trissolcus urichi (Crawford). Encontramos que aproximadamente el 52% de las masas de huevos de hemípteros recolectados del campo sobre caupí fueron parasitados naturalmente por los parasitoides mencionados anteriormente, mientras que casi el 10% de las masas de huevos centinelas de C. sanctus y C. ubica fueron parasitados.
View this article in BioOne
Downloads
Published
Issue
Section
License
Copyright for any article published in Florida Entomologist is held by the author(s) of the article. Florida Entomologist is an open access journal. Florida Entomologist follows terms of the Creative Commons, Attribution Non-Commercial License (cc by-nc). By submitting and publishing articles in Florida Entomologist, authors grant the FOJ and Florida Entomologist's host institutions permission to make the article available through Internet posting and electronic dissemination, and to otherwise archive the information contained both electronically and in a hard printed version. When used, information and images obtained from articles must be referenced and cited appropriately. Articles may be reproduced for personal, educational, or archival purposes, or any non-commercial use. Permission should be sought from the author(s) for multiple, non-commercial reproduction. Written permission from the author(s) is required for any commercial reproduction.