1,720,972 research outputs found
Resistenza ai Piretroidi in Popolazioni di Amblyseius andersoni (CHANT) (ACARI: PHYTOSEIIDAE).
No full textPreliminary studies on the presence of two haplotype of the olive fly symbiont Candidatus Erwinia dacicola in Italy.
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The first full host plant dataset of Curculionidae Scolytinae of the world: tribe Xyleborini LeConte, 1876
No full textXyleborini is the largest tribe of Scolytinae accounting for about 1300 species worldwide; all species are primarily xylomycetophagous, developing on symbiotic fungi farmed in plant woody tissues. Xyleborini wood-boring action, associated with the inoculum of symbiotic fungi, can lead, sometimes, to the emergence of host plant dieback, wood damage and death; for this reason, multiple Xyleborini are major pests on both cultivated, forest and ornamental trees. Many Xyleborini are invasive worldwide and great effort is expended to manage their biological invasions or prevent new arrivals. Imports of host plants often have a primary role as a pathway for introduction and are frequently responsible for the establishment of species in non-native environments. In this context, data availability on Xyleborini host plants is a major limiting factor in the development of effective detection and monitoring strategies as well as a fundamental variable to consider in risk assessment of plant pests and invasive species. This contribution provides updated host records and the hosts economic categorization for the 1293 Xyleborini known worldwide to date
Congruenza filogenetica della sottofamiglia Tephritinae (Dipetra, Tephritidae) con i loro batteri simbionti
No full textBiological insights and genetic characterization of a ground-searching mymarid wasp parasitizing eggs of a tettigoniid forest pest
No full textThe mymarid wasp Platystethynium triclavatum (Hymenoptera: Mymaridae) has been recently recorded as an egg parasitoid of the bush-cricket Barbitistes vicetinus (Orthoptera: Tettigoniidae). This species is endemic to northeastern Italy and has become an economically significant agricultural and forest pest. Biological attributes of P. triclavatum in relation to its host were still to be defined. Field parasitization rates and the number of individuals emerging from a single host egg were assessed by extracting eggs from soil at five outbreak sites in the Euganean Hills, while a laboratory choice experiment was conducted to evaluate the parasitoid’s preference for eggs of different ages. The natural emergence period was determined by periodically inspecting parasitized eggs buried in the ground. Additionally, genetic characterization of subpopulations from the Euganean Hills was conducted by analyzing both nuclear and mitochondrial DNA fragments. We found low parasitization rates across all sites. However, parasitoids successfully oviposited in B. vicetinus eggs of different ages, exhibiting a higher parasitism rate in one-year-old eggs compared to newly laid eggs. The average number of individuals that can hatch from a single B. vicetinus egg (95) can better reflect the potential impact of this parasitoid on regulating host populations. The hatching period was observed from the end of July to August. Subpopulations showed low values of haplotype diversity, with two main haplotypes diffused across almost all the sites. The absence of a geographical structure and a wide distribution within the landscape suggest a natural dispersal ability of P. triclavatum in the local area
The first host plant dataset of Curculionidae Scolytinae of the world: miscellaneous tribes (Part 2)
Full text linkScolytinae (Coleoptera: Curculionidae) are one of the most successful groups of invasive species. They are generally moved among continents transported within live plants, timber and wood-packaging materials. The damages caused by these insects, of economic and ecological relevance, can be caused both by the direct action of burrowing within host plant tissues and by the pathogens carried by some species. In order to prevent the introduction of new and potentially harmful species by planning effective monitoring strategies, the knowledge of recorded host plants is essential. This third contribution provides a complete list of host plants, with economic categorization, for 2,193 scolytine species, belonging to 16 tribes: Amphiscolytini, Bothrosternini, Carphodicticini, Chaetophloeini, Crypturgini, Diamerini, Dryocoetini, Hexacolini, Hylesinini, Hyorrhynchini, Hypoborini, Micracidini, Phloeotribini, Phrixosomatini, Scolytini, and Scolytoplatypodini
Oviposition site preference of Barbitistes vicetinus (Orthoptera, Tettigoniidae) during outbreaks
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