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Lobesia botrana (Lepidoptera: Tortricidae) and Cryptoblabes gnidiella (Lepidoptera: Pyralidae) represent a threat to wine production in Mediterranean countries. In recent years, the development of new formulations promoted the spread of pheromone-based mating disruption (MD) as an effective tool for the management of several insect pests in different agricultural contexts. In this study, we investigated the efficacy of an experimental dispenser designed for simultaneous MD of these two pests. The biodegradable double-tube dispenser (Isonet® L CG-BIOX235) was tested for two years in two Italian wine-growing sites, the first in Apulia (Southern Italy), and the second in Tuscany (Central Italy). Isonet® L CG-BIOX235 efficacy was evaluated by testing different doses (i.e., 300, 400, and 500 dispensers/ha), on different varieties (i.e., Aglianico, Syrah, and Viognier), and comparing it with an untreated control. The MD performed using this dispenser significantly reduced the infestation of both L. botrana (i.e., percentage of infested bunches and number of nests per bunch) and C. gnidiella compared to the untreated control, although the occurrence of the latter fluctuated throughout the two-year trials. Overall, although our results underline the possibility of combining the pheromones of the two pests in a single dispenser for their simultaneous MD, they also highlight the need for further studies on some aspects of C. gnidiella biology and consequently improve the MD efficacy against this species.
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Mariposas , Atrativos Sexuais , Animais , Vitis , Itália , Comportamento Sexual Animal/efeitos dos fármacos , Controle Biológico de Vetores/métodos , Lobesia botranaRESUMO
The Chilo infuscatellus (Lepidoptera: Pyralidae) is a significant pest of sugarcane in China. The genome-level characteristics of this pest are important genetic resources for identification, phylogenetic analysis, and even management. In the present study, the complete mitogenome of C. infuscatellus was sequenced and characterized. The assembled mitochondrial genome is 15,252 bp in length and includes 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs), 2 ribosomal RNA genes (rRNAs), and an A + T-rich region. Except for the CGA codon for the cox1 gene, the PCGs are initiated with ATN codons (ATG, ATT, and ATA). These PCGs are terminated with TAA or an incomplete termination codon of a single T. Except for the loss of the "DHU" arm for trnS1, the tRNA genes were folded into the typical cloverleaf structure. The A + T-rich region has a high AT content of 96.19% and contains the motifs "ATAGA" and "ATTTA", as well as a 19 bp poly-T stretch and microsatellite regions. The C. infuscatellus mitogenome exhibits a conserved gene order among lepidopteran insects, with a rearrangement of the trnM gene compared to the ancestral insect gene order. Phylogenetic analysis based on the 13 PCGs using Bayesian inference (BI) and maximum likelihood (ML) methods confirmed the monophyly of Pyralidae and Crambidae within Pyraloidea. The relationships between subfamilies in Pyralidae can be described as (Galleriinae + (Phycitinae + (Pyralinae + Epipaschiinae))). The "PS clade" and "non-PS clade" were formed within the family Crambidae. These findings provide valuable genetic resources for the identification, phylogenetic analysis, and management of sugarcane borers, contributing significantly to our understanding of the phylogeny of Pyraloidea insects and their evolution.
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This review describes global rice stemborer assemblages based on published species distributions, apparent host preferences, and reported shifts in assemblage composition in response to environmental factors. At least 56 moth (Lepidoptera: Crambidae, Pyralidae, Noctuidae) and fly (Diptera: Diopsidae, Chloropidae) species have been associated with rice; however, only 21 species are of potential, large-scale economic importance with a further 2 species of localized concern; most of the remaining species' associations with rice are based on dubious records without economic impacts on rice production. A list of stemborer-host associations indicates that rice stemborers are largely oligophagous on grasses (Poaceae), but a few species are polyphagous (also attacking Cyperaceae, Typhaceae, and some Eudicotyledon plants). Total stemborer abundance is determined by rice cropping patterns and management. Assemblage species richness is determined by geographical location, surrounding habitat (particularly as regards secondary and occasional species), and season. Evidence suggests that stemborer assemblage structure is largely determined through conditional interspecific competition. Regional assemblages typically include a single dominant lepidopteran species (primary species) that is largely restricted to rice and for which the climate is optimal; one or more secondary species that vary based on the age of rice attacked, rice anatomy, and the proximity to other habitats (including other crops); and occasional species that probably spill over from adjacent grasslands. The co-occurrence of lepidopteran with dipteran rice stemborers requires further research attention.
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Silk is a secretory product of numerous arthropods with remarkable mechanical properties. In this work, we present the complete sequences of the putative major silk proteins of E. kuehniella and compare them with those of G. mellonella, which belongs to the same moth family Pyralidae. To identify the silk genes of both species, we combined proteomic analysis of cocoon silk with a homology search in transcriptomes and genomic sequences to complement the information on both species. We analyzed structure of the candidate genes obtained, their expression specificity and their evolutionary relationships. We demonstrate that the silks of E. kuehniella and G. mellonella differ in their hydrophobicity and that the silk of E. kuehniella is highly hygroscopic. In our experiments, we show that the number of genes encoding sericins is higher in G. mellonella than in E. kuehniella. By analyzing the synteny of the chromosomal segment encoding sericin genes in both moth species, we found that the region encoding sericins is duplicated in G. mellonella. Finally, we present the complete primary structures of nine fibH genes and proteins from both families of the suborder Pyraloidea and discuss their specific and conserved features. This study provides a foundation for future research on the evolution of silk proteins and lays the groundwork for future detailed functional studies.
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Etofenprox is a novel pyrethroid insecticide that targets the nervous system of insects by affecting the function of the sodium channel. The current study examines the insecticidal activity of etofenprox against Ephestia kuehniella (Lepidoptera: Pyralidae) larvae, Rhyzopertha dominica (Coleoptera: Bostrychidae) adults, Sitophilus oryzae (Coleoptera: Curculionidae) adults, and Tribolium confusum (Coleoptera: Tenebrionidae) adults and larvae on different grain commodities. For this purpose, etofenprox was applied on barley, maize, oats, rice, and wheat at 0.1, 1, 5, and 10 ppm. Mortality levels were recorded after 7, 14, and 21 days of exposure. For E. kuehniella larvae, 10 ppm applied on whole rice killed 96.1% of the exposed individuals after 21 days of exposure. The application of etofenprox on oats at 5 ppm caused the death of 98.3% of the exposed R. dominica adults. Complete mortality was observed for R. dominica adults 21 days post-exposure to oats and whole rice treated with 10 ppm etofenprox. The highest concentration applied on barley caused 95.0% mortality to S. oryzae adults, while the same concentration on maize killed 76.8% of T. confusum adults after 21 days of exposure. Larvae of T. confusum exhibited high mortality levels reaching 99.4% after 21 days of exposure to barley treated with 10 ppm etofenprox. Progeny production of parental R. dominica adults was almost suppressed on all commodities treated with 5 ppm etofenprox. The offspring emergence of S. oryzae ranged between 4.4 and 24.6 adults per vial at 10 ppm. No T. confusum progeny was produced at 10 ppm etofenprox. Our results document that etofenprox is highly effective as grain protectant against several insect species, their developmental stages and their progeny production, but its performance depends on the type of the commodity that it is applied on.
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Besouros , Hordeum , Inseticidas , Mariposas , Oryza , Piretrinas , Tribolium , Gorgulhos , Humanos , Animais , Triticum , Avena , Zea mays , Dominica , Grão Comestível , InsetosRESUMO
Socio-sexual environment can have critical impacts on reproduction and survival of animals. Consequently, they need to prepare themselves by allocating more resources to competitive traits that give them advantages in the particular social setting they have been perceiving. Evidence shows that a male usually raises his investment in sperm after he detects the current or future increase of sperm competition because relative sperm numbers can determine his paternity share. This leads to the wide use of testis size as an index of the sperm competition level, yet testis size does not always reflect sperm production. To date, it is not clear whether male animals fine-tune their resource allocation to sperm production and other traits as a response to social cues during their growth and development. Using a polygamous insect Ephestia kuehniella, we tested whether and how larval social environment affected sperm production, testis size, and body weight. We exposed the male larvae to different juvenile socio-sexual cues and measured these traits. We demonstrate that regardless of sex ratio, group-reared males produced more eupyrenes (fertile and nucleate sperm) but smaller testes than singly reared ones, and that body weight and apyrene (infertile and anucleate sperm) numbers remained the same across treatments. We conclude that the presence of larval social, but not sexual cues is responsible for the increase of eupyrene production and decrease of testis size. We suggest that male larvae increase investment in fertile sperm cells and reduce investment in other testicular tissues in the presence of conspecific juvenile cues.
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Background: The Murcia Region (south-eastern Iberian Peninsula) has a great diversity of Lepidopteran fauna, as a zoogeographical crossroads and biodiversity hotspot with more than 850 butterflies and moth species recorded. New information: In the present paper, based on an examination of museum specimens, published records and new samples, a comprehensive and critical species list of Pyralidae moths (Lepidoptera, Pyraloidea) is synthesised. In total, three subfamilies, 67 genera and 142 species have been recorded and these are listed, along with their collection, literature references and biological data, including chorotype, voltinism and the flight period in the study area. The subfamilies are Galleriinae, Phycitinae and Pyralinae. Seventy-three species are newly recorded, sixty-two species are confirmed from literature and only seven species have not been observed for the Murcia Region.
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The Pyraloidea is one of the species-rich superfamilies of Lepidoptera and contains numerous economically important pest species that cause great loss in crop production. Here, we sequenced and annotated nine complete mitogenomes for Pyraloidea, and further performed various phylogenetic analyses, to improve our understanding of mitogenomic evolution and phylogeny of this superfamily. The nine mitogenomes were circular, double-stranded molecules, with the lengths ranging from 15,214 bp to 15,422 bp, which are comparable to other reported pyraloid mitogenomes in size. Gene content and arrangement were highly conserved and are typical of Lepidoptera. Based on the hitherto most extensive mitogenomic sampling, our various resulting trees showed generally congruent topologies among pyraloid subfamilies, which are almost in accordance with previous multilocus studies, indicating the suitability of mitogenomes in inferring high-level relationships of Pyraloidea. However, nodes linking subfamilies in the "non-PS clade" were not completely resolved in terms of unstable topologies or low supports, and future investigations are needed with increased taxon sampling and molecular data. Unexpectedly, Orybina Snellen, represented in a molecular phylogenetic investigation for the first time, was robustly placed as basal to the remaining Pyralidae taxa across our analyses, rather than nested in Pyralinae of Pyralidae as morphologically defined. This novel finding highlights the need to reevaluate Orybina monophyly and its phylogenetic position by incorporating additional molecular and morphological evidence.
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The Filippi's glands (FGs), formerly "Lyonet's glands", are paired accessory organs associated with the silk glands. They are unique to Lepidoptera caterpillars and their exact role is not clear. The FGs are thought to be involved in the construction of a silk cocoon in bombycoid moths. FGs can differ in size and shape, therefore, in this study we attempt to find a correlation between FG morphology and phylogenetic position within the Bombycoidea. We use light and electron microscopy to examine the presence and morphology of FGs in a range of wild (giant) silk moths and several related species. Our results confirm that the majority of studied silk moth species have complex type of FGs that continuously increase in size during larval development. We identified several species of giant silk moths and two hawk moth species that completely lack FGs throughout their larval development. Finally, in several hawk moth species in which FGs are well developed during the first larval stage, these glands do not grow and remain small during later larval growth. Our results suggest that FGs are not critical for spinning and that loss of FGs occurred several times during the evolution of saturniids and sphingids. Comparison of FGs in different moths is an important first step in the elucidation of their physiological significance.
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The complete mitochondrial genome (mitogenome) of Aglossa dimidiata (Lepidoptera: Pyralidae) was sequenced using high-throughput sequencing. The mitogenome of A. dimidiata was 15,225 bp in length. It comprised 37 typical genes and one control region. All protein-coding genes (PCGs) were initiated with ATN, except for COX1 (TTG). All PCGs used TAN as stop codon, except for ND5 and ND4 terminated with incomplete T. Twenty-two tRNA genes ranged from 61 to 71 bp in size. The monophyly of family Pyralidae and the sister relationship between A. dimidiata and Orthopygia glanucinalis are both supported by maximum likelihood method using the nucleotide sequences of 13 PCGs.
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The stored nut moth, Paralipsa gularis Zeller 1877 (Lepidoptera: Pyralidae), is a pest of stored products. In this study, the whole mitogenome of P. gularis was identified for the first time by using the next-generation sequencing (NGS) systems. The entire genome is 15,280 bp in length (ACCN: MW135332) consisting of 13 protein-coding genes (PCGs), two ribosomal RNA genes, 22 transfer RNA genes, and an A + T-rich region. Phylogenetic analysis using 13 PCGs of 20 species derived from six moth superfamilies showed that Pyralidae moths are monophyletic. This study can provide essential DNA molecular data for further phylogenetic and evolutionary analysis for Pyralidae family of Lepidoptera order.
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Four new species of Venturia Schrottky, 1902 (Hymenoptera, Ichneumonidae, Campopleginae) from Oriental China and Nepal are described (V. contiguus sp. nov. and V. yunnanensis sp. nov. from China; V. liuae sp. nov. and V. levocarinata sp. nov. from Nepal). In addition, two species are reported from China (V. serpentina Maheshwary, 1977 and V. inclyta (Morley, 1923)) for the first time and all listed species are illustrated. A key to all species from China and Nepal is provided.
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Pyralid moths, Ephestia kuehniella and Plodia interpunctella, are prevalent stored product pests. The insecticides are the main tool to control these moths in the stores. The data describing the response of these moths to insecticides are scarce. The lethal effect of the organophosphate, pyrethroid, and halogenated-pyrrole on moths larvae were compared in laboratory test. The hypothesis was that the very polyphagous P. interpunctella would have generally higher insecticide tolerance than that of the stenophagous E. kuehniella. Different insecticide concentrations were applied onto the inner surface of glass tube vials. Ten larvae of 14 or 21 d old of E. kuehniella and 7 or 14 d old of P. interpunctella were used by treatment. The larval mortality was checked after 24 h of exposure. The mortality was significantly influenced by age of larvae and the groups of chemicals. No differences among the efficacies of the tested formulations with identical active compounds were found, except significant different mortality of E. kuehniella on deltamethrin formulations. A comparison of analytical standards showed that P. interpunctella was less susceptible to the active ingredient pirimiphos-methyl than E. kuehniella, while E. kuehniella was less susceptible to deltamethrin than P. interpunctella. No differences between the two species were observed for chlorfenapyr. We therefore rejected the hypothesis that polyphagy/stenophagy can be a general predictor of insecticide tolerance in the two tested storage moths. The most important finding for effective use was that the young larvae of both species were more susceptible to tested insecticides than older larvae.
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Controle de Insetos , Inseticidas , Mariposas , Animais , LarvaRESUMO
Natural history museum collections can be a helpful tool in documenting changes in biodiversity throughout decades or even centuries. This article uncovers information on the content of three different museum collections, collected over 100 years. It deepens the knowledge on the distribution of pyraloid moth species occurring predominantly in the Continental parts of Croatia, but also in other areas of this country. The article presents the first published listing of pyraloid moth species held in three museum collections of the Croatian Natural History Museum in Zagreb. The list contains 148 taxa in total, 61 from the Igalffy collection, 96 from the Koca collection, and 96 from the Kucinic collection. Altogether, 96 species from the family Crambidae and 52 species from the family Pyralidae are listed.
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Mariposas , Animais , Biodiversidade , Croácia , Museus , História NaturalRESUMO
The Plodia interpunctella belongs to Pyralidae in Lepidoptera. The complete mitogenome of P. interpunctella was described in this study, which is typically circular duplex molecules and 15,403 bp in length, containing the standard metazoan set of 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes, and an A + T-rich region. The gene order is the same as other lepidopterans. Except for cox1 started with CGA, all other PCGs started with the standard ATN codons. Most of the PCGs terminated with the stop codon TAA, whereas nad1 has the stop codon TAG, nad4 has the incomplete stop codon T. The phylogenetic tree showed that P. interpunctella and Corcyra cephalonica are clustered into a clade Pyralidae.
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The Dioryctria yiai belongs to Pyralidae in Lepidoptera. The complete mitogenome of D. yiai was described in this study, which is typical circular duplex molecules and 15,430 bp in length, containing the standard metazoan set of 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes, and an A + T-rich region. The gene order is same with other lepidopterans. Except for cox1 started with CGA, all other PCGs started with the standard ATN codons. Most of the PCGs terminated with the stop codon TAA, whereas cox2 has the incomplete stop codon T. The phylogenetic tree showed that D. yiai and other six species belong to Phycitinae, are clustered into a clade.
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Identification of pyraloid species is often hampered by highly similar external morphology requiring microscopic dissection of genitalia. This becomes especially obvious when mass samples from ecological studies or insect monitoring have to be analysed. DNA barcode sequences could accelerate identification, but are not available for most pyraloid species from New Zealand. Hence, we are presenting a first DNA-barcode library for this group, providing 440 COI barcodes (cytochrome C oxidase I sequences) for 73 morphologically-identified species, which is 29% of Pyraloidea known from New Zealand. Results are analysed using the Barcode Index Number system (BIN) of BOLD and the Automatic Barcode Gap Discovery method (ABGD). Using BIN, the 440 barcodes reveal 82 clusters. A perfect match between BIN assignment and morphological identification was found for 63 species (86.3%). Four species (5.5%) share BINs, each with two species in one BIN, of which Glaucocharis epiphaea and Glaucocharis harmonica even share the same barcode. In contrast, six species (8.2%) split into two or more BINs, with the highest number of five BINs for Orocrambus ramosellus. The interspecific variation of all collected specimens of New Zealand Pyraloidea averages 12.54%. There are deep intraspecific divergences (> 2%) in seven species, for instance Orocrambus vulgaris with up to 6.6% and Scoparia ustimacula with 5.5%. Using ABGD, the 440 barcodes reveal 71 or 88 operational taxonomic units (OTUs), depending on the preferred partition. A perfect match between OTU and morphological identification was found for 56 species (76.7%) or 62 species (84.9%). ABGD delivers four or seven species sharing OTUs and four or ten species split into more than one OTU. Morphological re-examination, as well as the analysis of a concatenated dataset of COI and the nuclear markers EF1α and GADPH for species split into more than one BIN or OTU, do not support a higher number of species. Likewise, there is no evidence for Wolbachia infection as a trigger for these sequence variations.
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ABSTRACT Although consisting of 53 described species, the New World genus Microcrambus Błeszyński contains many more undescribed species. This study aims to bring a small contribution to the knowledge on the diversity of Microcrambus based on the fauna of Colombia. A literature review of the known fauna of the country was performed and specimens were collected at light in 2018. Five species are recorded for the first time from Colombia, including two new species (M. arevaloi Landry and M. leticiensis Landry) from Leticia, Amazonas Department, described based on morphological and molecular data. The habitus of both sexes, as well as the genitalia are illustrated for the new species. The male genitalia of one Colombian specimen of Microcrambus elpenor Błeszyński are also illustrated as they were found to differ slightly with the drawing provided in the original description. A list of the eight species found to presently represent the known fauna of Microcrambus in Colombia is given, along with comments on their known distribution, including new country records.
RESUMEN Aunque ya consta de 53 especies, el género del Nuevo Mundo Microcrambus Błeszyński contiene muchas más especies sin describir. Este estudio tiene como objetivo realizar una pequeña contribución al conocimiento sobre la diversidad de Microcrambus, basado en la fauna de Colombia. Se realizó una revisión de la literatura de la fauna conocida del país y se recolectaron especímenes con trampas de luz, en 2018. Se registran cinco especies por primera vez para Colombia, incluidas dos nuevas (M. arevaloi Landry y M. leticiensis Landry), de Leticia, Departamento de Amazonas, descritas con base a datos morfológicos y moleculares. El habitus de ambos sexos, así como los genitales, se ilustran para las nuevas especies. También, se ilustran los genitales masculinos de un espécimen colombiano de Microcrambus elpenor Błeszyński, ya que se halló que difieren ligeramente con el dibujo proporcionado en la descripción original. Se proporciona una lista de las ocho especies que, actualmente, representan la fauna conocida de Microcrambus en Colombia, junto con comentarios sobre sus distribuciones conocidas, incluidos nuevos registros para países.
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The navel orangeworm, Amyleois transitella (Lepidoptera: Pyralidae), is a key pest of almonds and pistachios in California. Larvae directly feed on nuts, reducing quality and yield, and adults can introduce fungi that produce aflatoxins. The development of sterile insect technique (SIT) is currently being explored as a management tool for this pest. Large quantities of A. transitella are mass-reared, irradiated, and shipped to California from a USDA APHIS facility in Phoenix, AZ. Preliminary field releases of sterile A. transitella from this facility resulted in poor recovery of males in pheromone traps, raising concerns that mass-reared male A. transitella may not be responding to pheromone from virgin females. In this study, a wind tunnel was used to evaluate the response of both irradiated and non-irradiated mass-reared A. transitella males to crude pheromone extract from females, and their performance was compared to two strains of locally reared non-irradiated A. transitella. While initial responses associated with pheromone detection where similar between mass-reared and locally reared moths, a lower proportion of the mass-reared moths ultimately made contact with the pheromone source. Surprisingly, the addition of irradiation did not further decrease their performance. While mass-reared moths respond to pheromone, their ability to locate and make contact with the pheromone source appears to be impeded. The underlying mechanism remains unclear, but is likely related to damage incurred during the mass-rearing and shipping process.
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A list of seventeen rare and little known species of Crambidae and Pyralidae from Ukraine is given. Hyperlais claralis (Caradja, 1916) stat. rev., comb. nov. is recorded for the first time for Europe. Five species are found in Ukraine for the first time: H. claralis, Titanio ledereri (Staudinger, 1870), Lambaesia pistrinariella (Ragonot, 1887), Gymnancyla gilvella (Ragonot, 1887) and Sciota lucipetella (Jalava, 1978). Two neglected European species-Lambaesia pistrinariella and Ancylosis monella (Roesler, 1973), are confirmed to occur in Europe. The lectotype of L. pistrinariella is designated and the species is recorded for the first time from Russia. The hitherto unknown females of H. claralis and L. pistrinariella are described. The differences between H. claralis and other related Hyperlais-species are briefly discussed. The adults and the genitalia of H. claralis, H. dulcinalis (Treitschke, 1835), Udea institalis (Hübner, 1819), A. monella, L. pistrinariella, Bradyrrhoa confiniella (Zeller, 1848), B. imperialella (Ragonot, 1887) and G. gilvella are illustrated. The biology of Loxostege clathralis (Hübner, 1813), Epischidia fulvostrigella (Eversmann, 1844), B. imperialella and Pempeliella bulgarica Slamka Plant, 2016 is described based on observation by the third author in Crimea. Salicornia perenanns Willd. is recorded as a new host plant for G. gilvella and Halocnemum strobilaceum (Pall.) M. Bieb.-as a new host plant for E. fulvostrigella. Epischidia caesariella (Hampson in Ragonot Hampson, 1901) and Pempeliella sororiella (Zeller, 1839) are removed from the list of Pyralidae of Ukraine due to misidentification.