The eucoiline species Ganaspis brasiliensis (von Ihering) (Hymenoptera: Figitidae) is recorded for the first time in Argentina, with confirmation of parasitism of Drosophila suzukii (Matsumura) infesting healthy raspberry fruit (Rubus idaeus L. cv. "Heritage") still on the plant. Drosophila suzukii puparia were recovered from fruit collected in an organic farm in Tafí del Valle, Tucumán, Argentina. One G. brasiliensis specimen was obtained from an isolated D. suzukii puparium. An additional 83 specimens, deposited in the entomological collection of the Museo de la Plata, Argentina, were also identified as G. brasiliensis. This parasitoid species is distributed in four biogeographical provinces of Argentina. The specimens of G. brasiliensis collected in Argentina are assumed to belong to a worldwide distributed and generalist lineage, parasitizing several Drosophila species. A taxonomic key of known Ganaspis species from Argentina is provided.
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http://dx.doi.org/10.1007/s13744-021-00912-z | DOI Listing |
iScience
December 2024
Max Planck Institute for Chemical Ecology, Department of Evolutionary Neuroethology, Jena, Germany.
In holometabolous insects, the choice of oviposition substrate by the adult needs to be coordinated with the developmental needs of the larva. female flies possess an enlarged serrated ovipositor, which has enabled them to conquer the ripening fruit as an oviposition niche. They insert their eggs through the skin of priced small fruits.
View Article and Find Full Text PDFJ Evol Biol
November 2024
Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C. 1871, Denmark.
Host-pathogen infections and possible effects on co-evolutionary patterns depend on the genotypes of both host and pathogen. Obligate fungal pathogens of plants are often characterized by host-pathogen genotype-by-genotype (GxG) interactions, but whether these patterns exist in obligate insect fungal pathogens is unclear. We take advantage of the obligate insect pathogenic fungus Entomophthora muscae, where individual isolates are specific to different dipteran host species in nature but can cross-infect multiple fly species in the laboratory.
View Article and Find Full Text PDFJ Econ Entomol
December 2024
Department of Agriculture, Food and Environment, University of Catania, Catania, Italy.
Programs to mass rear and release Ganaspis kimorum Buffington (Hymenoptera: Figitidae) are ongoing in many countries to manage its host Drosophila suzukii (Matsumura) (Diptera: Drosophilidae). To optimize parasitoid production and synchronize field releases with pest outbreaks, we investigated a cold storage protocol by exposing different immature G. kimorum stages to 2 storage temperatures (10 or 15°C) for 2, 4, 6, or 8 wk.
View Article and Find Full Text PDFNeotrop Entomol
December 2024
Crop Production Graduate Program, Santa Catarina State Univ, Lages, Santa Catarina, Brazil.
A bottleneck in sustainable fruit production is the replacement of chemical products with natural compounds. Matrine and oxymatrine, derived from a Chinese medicinal herb, have exhibited potential for controlling agricultural pests. However, there is no information regarding their effectiveness in managing dipterans.
View Article and Find Full Text PDFJ Insect Physiol
December 2024
USDA-ARS, Horticultural Crops Disease and Pest Management Research Unit, USA. Electronic address:
Diuretic hormones (DHs) activate corresponding G protein-coupled receptors (GPCRs), mediating the water and ion homeostasis in arthropods. There are two different DHs known to be expressed in insects, calcitonin (CT)-like DH31 and corticotropin-releasing factor (CRF)-like DH44. In this study, we identified and characterized a DH44 and five GPCR variants, DH44-R1 and DH44-R2a/b/c/d, in Drosophila suzukii (spotted-wing drosophila), causing detrimental damage to fresh and soft-skinned fruits.
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