496 research outputs found
Effects on the development of Spodoptera frugiperda feeding on diets spiked with Solanum sisymbriifolium extracts.
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Previous issue date: 202
FIGURE 35 in Resurgence of a forgotten Southern Brazil endemic species: taxonomic position, redescription, and spatio-temporal distribution of Porosagrotis carolia Schaus, 1929 (Lepidoptera: Noctuidae: Noctuinae)
No full textFIGURE 35. Number of known specimens of Feltia carolia (Schaus, 1929) comb. nov. (n=53) by month of collection, from 1922 to 2014; light gray: records from the literature and specimens in entomological collections; dark gray: specimens collected in light traps from 1998 to 1999 (see text for details).Published as part of Dias, Fernando M. S., Specht, Alexandre, Blas, German San, Casagrande, Mirna M. & Mielke, Olaf H. H., 2017, Resurgence of a forgotten Southern Brazil endemic species: taxonomic position, redescription, and spatio-temporal distribution of Porosagrotis carolia Schaus, 1929 (Lepidoptera: Noctuidae: Noctuinae), pp. 421-433 in Zootaxa 4363 (3) on page 431, DOI: 10.11646/zootaxa.4363.3.7, http://zenodo.org/record/110818
Immature stages of Spodoptera cosmioides (Lepidoptera: Noctuidae): developmental parameters and host plants
No full textABSTRACT. The goal of this study was to detail the temporal and morphological parameters of the immature stages of Spodoptera cosmioides (Walker, 1858) and to gather information about their larval host plants. Larvae were reared on artificial diet and under controlled conditions (25 ± 1°C, 70 ± 10% RH and 14 hour photophase). The viability of eggs, larvae (pre-pupae period inclusive) and pupae were 98.97, 97.33, 97.95 and 94.76%, respectively. The average duration of egg, larval, pre-pupal and pupal stages was 3.82, 19.24, 3.20 and 14.81 days, respectively. A small proportion of females (9.48%) passed through seven instars, and female development was significantly slower than male development. The female larvae that developed through six and seven instars exhibited a mean growth rate of 1.63 and 1.49, respectively. Overall, female pupae were significantly larger, exhibiting slower development than males. One hundred and twenty six plants belonging to 40 families are listed as hosts of S. cosmioides, mainly including Solanaceae, Fabaceae, Asteraceae and Poaceae
Decomposable Specht modules indexed by bihooks II
No full textPreviously, the last two authors found large families of decomposable Specht
modules labelled by bihooks, over the Iwahori--Hecke algebra of type . In
most cases we conjectured that these were the only decomposable Specht modules
labelled by bihooks, proving it in some instances. Inspired by a recent
semisimplicity result of Bowman, Bessenrodt and the third author, we look back
at our decomposable Specht modules and show that they are often either
semisimple, or very close to being so. We obtain their exact structure and
composition factors in these cases. In the process, we determine the graded
decomposition numbers for almost all of the decomposable Specht modules indexed
by bihooks.Comment: 33 pages, comments are welcome. v2 is the final version, to appear in
Algebras and Representation Theor
FIGURE 43 in Taxonomy of five neglected South American species of Dargida Walker (Lepidoptera: Noctuidae)
No full textFIGURE 43. Geographic distribution of Dargida species.Published as part of Dolibaina, Diego Rodrigo, Blas, German San, Specht, Alexandre, Casagrande, Mirna Martins & Mielke, Olaf Hermann Hendrik, 2020, Taxonomy of five neglected South American species of Dargida Walker (Lepidoptera: Noctuidae), pp. 199-217 in Zootaxa 4853 (2) on page 215, DOI: 10.11646/zootaxa.4853.2.3, http://zenodo.org/record/451908
Taxonomy of the rivorum species-group of Leucania Ochsenheimer, 1816 (Lepidoptera: Noctuidae)
No full textDolibaina, Diego Rodrigo, Casagrande, Mirna Martins, Specht, Alexandre, Mielke, Olaf Hermann Hendrik, Legrain, Albert, Zilli, Alberto, Goldstein, Paul (2019): Taxonomy of the rivorum species-group of Leucania Ochsenheimer, 1816 (Lepidoptera: Noctuidae). Zootaxa 4711 (3): 545-560, DOI: https://doi.org/10.11646/zootaxa.4711.3.
Specht modules and Kazhdan–Lusztig cells in type Bn
No full textAbstractDipper, James and Murphy generalized the classical Specht module theory to the Hecke algebras of type Bn. On the other hand, for any choice of a monomial order on the parameters of type Bn, we obtain the corresponding Kazhdan–Lusztig cell modules. In this paper, we show that the Specht modules are naturally isomorphic to the Kazhdan–Lusztig cell modules if we choose the dominance order on the parameters, as in the “asymptotic case” studied by Bonnafé and the second named author. We also give examples which show that such an isomorphism does not exist for other choices of monomial orders
FIGURE 41 in Taxonomy of the rivorum species-group of Leucania Ochsenheimer, 1816 (Lepidoptera: Noctuidae)
No full textFIGURE 41. Geographic distribution of the species of Leucania belonging to the rivorum species-group.Published as part of Dolibaina, Diego Rodrigo, Casagrande, Mirna Martins, Specht, Alexandre, Mielke, Olaf Hermann Hendrik, Legrain, Albert, Zilli, Alberto & Goldstein, Paul, 2019, Taxonomy of the rivorum species-group of Leucania Ochsenheimer, 1816 (Lepidoptera: Noctuidae), pp. 545-560 in Zootaxa 4711 (3) on page 557, DOI: 10.11646/zootaxa.4711.3.6, http://zenodo.org/record/358666
A new cecidogenous species of many-plumed moth (Alucitidae) associated with Cordiera A. Rich. ex DC. (Rubiaceae) in the Brazilian Cerrado.
No full textLarvae of many-plumed moths (Alucitidae), especially in the world-wide genus Alucita Linnaeus, 1758 are known as borers or gall-inducers on flowers, fruits and shoots of a few dicotyledonous families, including Bignoniaceae, Caprifoliaceae and Rubiaceae. However, there is no study available on the biology of the monotypic, Neotropical genus Prymnotomis Meyrick, 1931 except for its original description that was based on a single male, the holotype of Prymnotomis crypsicroca Meyrick, 1931 from Espirito Santo, Brazil. We describe here a second species for this genus, Prymnotomis cecidicola sp. nov. whose larvae induce galls on Cordiera elliptica (Cham.) Kuntze (Rubiaceae), a dioecious plant with dimorphic inflorescences found in the Brazilian Cerrado, Planaltina City, Federal District. Adults, larvae, pupae and galls are illustrated under light and scanning electron microscopy. Galls are green, spherical, unilocular and develop individually on C. elliptica flower buds. During development they look like fruits in shape and colour but are larger, do not have style scars when on female plants, and are induced also in male inflorescences. Pupation occurs outside the gall within a silk cocoon, presumably in the litter. A preliminary analysis of DNA barcode sequences including putative members of other alucitid lineages and Neotropical BINs (Barcode Index Number) supports Prymnotomis cecidicola sp. nov. as an independent phylogenetic unit, with 12 to 18% divergence. Its nearest-neighbour was the BIN cluster 5 (BOLD:AAA0842) that includes specimens from Costa Rica
Survival and Development of Striacosta albicosta (Smith) (Lepidoptera: Noctuidae) Immature Stages on Dry Beans, non-Bt, Cry1F, and Vip3A Maize
No full textStriacosta albicosta is a crop pest that causes economic damage in the United States and Canada. Only maize and dry beans are shown to be suitable hosts, since larval development is incomplete on other hosts. The objective of this study was to describe the developmental parameters of immature stages of S. albicosta feeding on dry beans, non-Bt, Cry1F, and Vip3A maize. For Vip3A, mortality was 100% after 24 h. Larvae feeding on non-Bt maize had the highest larval survival (70.6%) compared to the other hosts. Maize expressing Cry1F had higher survival (31.3%) than dry beans (26.0%). Larvae feeding on dry beans had a significantly faster total development time (74.8 days), compared to 92.5 days for non-Bt and 96.2 days for Cry1F. All larvae developed through seven instars. Pupae from larvae that had fed on non-Bt maize were significantly heavier than pupae from other hosts. An understanding of S. albicosta immature development on various host plants is needed to improve recommendations for effective scouting, treatment timing, and economic thresholds. Differential development can result in an extended adult emergence period, and possibly result in assortative mating between Bt susceptible and resistant populations, which violates the assumption of random mating necessary for current resistance management strategies for Bt maize. Therefore, understanding the impact of host plant and transgenic traits on aspects of pest biology will aid in developing effective integrated pest management and insect resistance management strategies for this pest
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