Fengrui Dou, Wenzhuai Ji, Qing Xie, Jingyu Wang, Yixia Cao, Juan Shi
{"title":"Transcriptome analysis and temporal expression patterns of wing development-related genes in Lymantria dispar (Lepidoptera: Erebidae).","authors":"Fengrui Dou, Wenzhuai Ji, Qing Xie, Jingyu Wang, Yixia Cao, Juan Shi","doi":"10.1093/ee/nvae111","DOIUrl":"10.1093/ee/nvae111","url":null,"abstract":"<p><p>Spongy moth, Lymantria dispar Linnaeus (Lepidoptera: Erebidae), stands as a pervasive international threat, marked by its designation as one of the \"world's 100 worst invasive species\" by IUCN, owing to its voracious leaf-eating habits encompassing over 500 plant species. Its strong flight ability facilitates its spread and invasion. The present study aims to uncover differential gene expression, utilizing the Illumina Novaseq6000 sequencing platform for comprehensive transcriptome sequencing and bioinformatic analysis of total RNA extracted from larvae and pupae. Results revealed pivotal processes of protein functional structure conformation, transport, and signal transduction in functional gene annotation during the 2 developmental stages of spongy moth. 18 functional genes, namely, Distal-less (Dll), Wingless (Wg), Decapentaplegic (Dpp), Hedgehog (Hh), Cubitus interruptus (Ci), Patched (Ptc), Apterous (Ap), Serrate (Ser), Fringe (Fng), Achaete (Ac), Engrailed (En), Vestigial (Vg), Scute (Sc), Invected (Inv), Scalloped (Sd), Ultrabithorax (Ubx), Serum Response Factor (SRF), and Spalt-major, associated with wing development were identified, and their expression levels were meticulously assessed through real-time quantitative PCR (RT-qPCR) in 1st-6th instar larvae and male and female pupae wing discs. The results showed that 18 genes exhibited expression. Furthermore, the relative expression values of wing development-related genes were significantly higher in the pupae stage than in the larval stage. The relative expression values of male and female pupae were also significantly different. The RT-qPCR results were in general agreement with the results of transcriptome analysis. This study establishes a foundational understanding of the developmental mechanisms governing the formation of spongy moth wings.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"654-667"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143763177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Temperature, density, and phenotypic plasticity of melanism in Callosobruchus maculatus (Coleoptera: Chrysomelidae).","authors":"Andrew M Stoehr, Liam R Donahue","doi":"10.1093/ee/nvaf034","DOIUrl":"10.1093/ee/nvaf034","url":null,"abstract":"<p><p>Variation in dark coloration due to melanin, i.e., melanism, in insects is often phenotypically plastic and adaptive. However, the pigment melanin and/or components of the melanin synthesis pathway, have many functions in insects beyond just coloration, such as roles in immune defense and cuticular hardening. For these reasons, melanism responses may sometimes be complicated, particularly if melanin-based coloration trades off with other melanin-based functions; such trade-offs may be related to resource availability. We manipulated the temperature and density (number of beetles per bean) of cowpea weevils, Callosobruchus maculatus (Fabricus) (Coleoptera: Chrysomelidae) during the larval and pupal period and found both variables affected the coloration and size (measured as area of elytra) of the emerging adults. Lower temperatures produced darker and larger beetles in both sexes, with females also being darker than males. Increased numbers of beetles per bean reduced both the size and darkness of the beetles. The effects of temperature on melanism are consistent with the adaptive thermal melanism hypothesis while the effects of per-bean density on melanism may reflect resource-based trade-offs. However, both effects were modest and left considerable variation in color unexplained.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"585-592"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144274466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Derek A Uhey, Andrew J Sánchez Meador, Margaret M Moore, Sneha Vissa, Richard W Hofstetter
{"title":"Colony densities and spatial patterns of harvester ants (Pogonomyrmex occidentalis and Pogonomyrmex rugosus) in grazed and ungrazed areas of northern Arizona.","authors":"Derek A Uhey, Andrew J Sánchez Meador, Margaret M Moore, Sneha Vissa, Richard W Hofstetter","doi":"10.1093/ee/nvaf044","DOIUrl":"https://doi.org/10.1093/ee/nvaf044","url":null,"abstract":"<p><p>Harvester ants play a crucial role as ecosystem engineers, particularly in nest-building activities that involve clearing nest-disks of vegetation. These clearings can be large and influence plant communities affecting rangeland management. In some cases, colony density may be increased by grazing but studies are sparse with conflicting results. We examined the effects of grazing on 2 harvester ant species (Pogonomyrmex occidentalis and Pogonomyrmex rugosus) at 5 sites in northern Arizona. We used preestablished grazing-exclusion treatments to compare colony density and spacing adjacent to and within grazed areas. At all sites, colony density was marginally higher in excluded treatments. Only P. occidentalis showed significant spatial patterns in response to grazing, where nests were evenly spaced on small distances (>5 m) in the grazing-excluded treatment. We observed large differences in nest size and density between ant species. Pogonomyrmex occidentalis made larger nests and cleared more land area than P. rugosus. Pogonomyrmex occidentalis peaked in density at 37 nests/ha occupying 1.87% of land area with smaller nearest neighbor distances (10.6 to 13.6 m), while P. rugosus peaked at 16 nests/ha occupying 0.20% of land area with larger nearest neighbor distances (17.9 to 24.3 m). Together our results provide limited but interesting evidence of negative effects of grazing on harvester ant nests. We discuss our findings in the context of other studies measuring colony densities in rangelands and conclude that grazing effects on nest spatial arrangements are inconsistent and differ among locations, highlighting the need for future studies.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144505158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Natalie M West, Joshua W Campbell, Tatyana A Rand, Evan S Waite, Christina Palmrose-Kreiger, Zachary A Sylvain, David H Branson
{"title":"Reclaimed oil pads harbor higher Carabidae (Coleoptera) abundances and species richness-but fall short of reestablishing the native prairie community.","authors":"Natalie M West, Joshua W Campbell, Tatyana A Rand, Evan S Waite, Christina Palmrose-Kreiger, Zachary A Sylvain, David H Branson","doi":"10.1093/ee/nvaf037","DOIUrl":"10.1093/ee/nvaf037","url":null,"abstract":"<p><p>In grassland ecosystems, oil and gas production areas require vegetation reclamations once extractions are completed. These reclamations take years to accomplish and may appear similar to the surrounding undeveloped grasslands. To test whether reclaimed oil/gas pads successfully recover ecological communities, we collected and utilized carabid beetles (Coleoptera: Carabidae) as bioindicators of reclamation success. We compared carabid beetle communities on well pad reclamations and within undisturbed native prairie 50 m and 150 m from the well pad reclaim edges. Overall, we found lower carabid richness and abundance in native prairie at the 150-m distance compared to the well pad reclaims, with the 50 m distance generally falling between the two. The differences in carabid communities likely reflect previously documented differences in vegetation types and structure within the reclaimed well pads that have persisted for decades after reclamation. These reclaimed habitats may be acting as \"islands\" for certain carabid species, representing population sources or sinks that likely influence carabid dynamics within the adjacent native prairie. These findings demonstrate a long-term signature of development disturbance in the landscape.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"489-498"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143996832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gina M Angelella, Christopher T McCullough, Megan E O'Rourke
{"title":"On-farm wildflower plantings generate opposing reproductive outcomes for solitary and bumble bee species.","authors":"Gina M Angelella, Christopher T McCullough, Megan E O'Rourke","doi":"10.1093/ee/nvaf033","DOIUrl":"10.1093/ee/nvaf033","url":null,"abstract":"<p><p>Pollinator habitat can be planted on farms to enhance floral and nesting resources, and subsequently, pollinator populations. There is ample evidence linking such plantings to greater pollinator abundance on farms, but less is known about their effects on pollinator reproduction. We placed Bombus impatiens Cresson (Hymenoptera: Apidae) and Megachile rotundata (F.) (Hymenoptera: Megachilidae) nests out on 19 Mid-Atlantic farms in 2018, where half (n = 10) the farms had established wildflower plantings and half (n = 9) did not. Bombus impatiens nests were placed at each farm in spring and mid-summer and repeatedly weighed to capture colony growth. We quantified the relative production of reproductive castes and assessed parasitism rates by screening for conopid fly parasitism and Nosema spores within female workers. We also released M. rotundata cocoons at each farm in spring and collected new nests and emergent adult offspring over the next year, recording female weight as an indicator of reproductive potential and quantifying Nosema parasitism and parasitoid infection rates. Bombus impatiens nests gained less weight and contained female workers with Nosema spore loads over 150 times greater on farms with wildflower plantings. In contrast, M. rotundata female offspring weighed more on farms with wildflower plantings and marginally less on farms with honey bee hives. We conclude that wildflower plantings likely enhance reproduction in some species, but that they could also enhance microsporidian parasitism rates in susceptible bee species. It will be important to determine how wildflower planting benefits can be harnessed while minimizing parasitism in wild and managed bee species.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"623-631"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143997596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Environmental factors impacting leg coloration in Chrysodeixis includens (Lepidoptera: Noctuidae).","authors":"K Clint Allen, Blake H Elkins, Nathan S Little","doi":"10.1093/ee/nvaf031","DOIUrl":"10.1093/ee/nvaf031","url":null,"abstract":"<p><p>The soybean looper, Chrysodeixis includens (F.) (Lepidoptera: Noctuidae), is widely distributed throughout North and South America. It appears on important crop hosts with mixed populations of other looper species, especially the cabbage looper, Trichoplusia ni (Hübner) (Lepidoptera: Noctuidae). One of the earliest attempts to distinguish between the 2 species was to examine the legs of caterpillars, and those that possessed \"black\" legs were considered soybean loopers. However, it was demonstrated that this characteristic was variable and not under simple genetic expression. We examined 3 different environmental factors (temperature, light duration, and rearing density) to determine if these had an impact on the development of dark coloration on soybean looper legs. Larvae were exposed to 5 distinct levels of each environmental variable. We found that all 3 factors impacted the amount of dark coloration in the legs. Larvae reared at the coldest temperature and most light displayed darker-colored legs as early as the third instar of larval development. As larval rearing density increased, dark coloration on legs also increased, but this was not apparent until the fifth instar of larval development. There was a general trend for pupal weight to decrease and days to pupation to increase as the percentage of darkness on soybean loopers' legs increased within the various treatments of the study. Overall, dark leg coloration was largely dependent on environment and an apparent fitness cost was associated with larvae exhibiting darker legs within the various rearing conditions examined.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"565-573"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143729488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of environmental factors on predation rate for Bactrocera dorsalis on a tropical island.","authors":"Jian Wen, Xingyu Geng, Zhe Shan, Jingyao Gong, Yongyue Lu, Fengqin Cao","doi":"10.1093/ee/nvaf028","DOIUrl":"10.1093/ee/nvaf028","url":null,"abstract":"<p><p>In tropical environments, insect prey face high predation rates due to the diverse interspecific interactions driven by various environmental factors. However, a detailed understanding of how these factors interact to influence predation rate remains limited. This complexity increases with the presence of both native and nonnative predators, yet no comprehensive assessment has been conducted. In this study, we used the pupae of the widely distributed fruit fly Bactrocera dorsalis to examine how 8 tropical environmental factors affect its predation rate. Principal component analysis identified 3 principal components (PCs) that collectively explain 78.86% of the variance in the influence of these environmental factors: PC1 accounted for 49.62%, PC2 for 15.59%, and PC3 for 12.65%. PC1 was strongly influenced by patch density (loading: 0.87) and altitude (loading: -0.90), with communalities of 77.8% and 82.3%, respectively. PC2 was primarily driven by native predator diversity (loading: 0.90), with the highest communality (84.1%). PC3 was characterized by temperature (loading: 0.65) and humidity (loading: 0.70), with communalities of 81.2% and 81.8%, respectively. Although no individual PC had a significant effect on predation rate, the interaction between PC1 and PC2 was highly significant, indicating a strong combined effect. This interaction likely results from the way altitude and human disturbance contribute to habitat fragmentation, which in turn affects native predator diversity and alters the predation rate for B. dorsalis. These findings offer valuable insights into the interaction between B. dorsalis and its predators, as well as into the effectiveness of potential control strategies involving predators.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"480-488"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143771546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Aphids and their parasitoids persist using temporal pairing and synchrony.","authors":"Eduardo Engel, Douglas Lau, Wesley A C Godoy","doi":"10.1093/ee/nvaf035","DOIUrl":"10.1093/ee/nvaf035","url":null,"abstract":"<p><p>The study analyzed the population dynamics of aphids and their parasitoids in winter cereals in southern Brazil, using wavelet transform (WT) to detect patterns of periodicity and synchronization over a decade (2011 to 2020). The wavelet analysis revealed different patterns of population peaks between aphid species and their parasitoids. Aphids, such as Rhopalosiphum padi L., Sitobion avenae (Fabricius), Schizaphis graminum (Rondani), and Metopolophium dirhodum (Walker), showed varied peak frequencies, with M. dirhodum consistently exhibiting a shortening interval between outbreaks. In contrast, parasitoids maintained more-constant patterns, with peak frequencies predominantly around 12 mo. Cluster analysis identified 4 highly synchronized aphid-parasitoid pairs: S. graminum-Diaeretiella rapae (MacIntosh), R. padi-Aphidius platensis Brèthes, S. avenae-Aphidius uzbekistanicus Luzhetzki, and M. dirhodum-Aphidius rhopalosiphi De Stefani-Perez. The wavelet coherence (WC) showed significant correlations between the time series of these pairs, ranging from in-phase to anti-phase relationships over time. The results indicate that wavelet analysis is a viable tool for characterizing non-stationary time series, such as aphid and parasitoid populations. Understanding these dynamics and synchronization patterns can support integrated pest-management strategies, enabling more effective and sustainable agricultural interventions.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"644-653"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143996763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kenneth W Dearborn, Daegan J G Inward, Sandy M Smith, Chris J K MacQuarrie
{"title":"Fraxinus foliage: does host species during adult maturation feeding alter the fecundity of emerald ash borers, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae)?","authors":"Kenneth W Dearborn, Daegan J G Inward, Sandy M Smith, Chris J K MacQuarrie","doi":"10.1093/ee/nvaf018","DOIUrl":"10.1093/ee/nvaf018","url":null,"abstract":"<p><p>Herbivorous insects can have their reproductive potential influenced by the quality and species of host plants they feed upon. The emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), is an invasive pest of ash trees (Fraxinus spp.) within its introduced range. As adults, EAB must feed upon foliage to sexually mature. We compared the influence of 4 North American ash species on EAB via foliage feeding to assess impacts on female lifespan and reproductive metrics. We fed 136 female EAB, 34 in each foliage group, either black, green, tropical, or white ash throughout their adult life. We performed daily inspections for adult mortality, oviposition, and egg hatching. We found that the mean female lifespan, fertility rate, and mean egg development time were not affected by the ash species. Potential and realized fecundity each increased with summed female group lifespan (days), but this rate differed among ash species. Consequently, there was a statistically significant interaction effect of the summed female group lifespan and the host foliage. Green ash-fed EAB laid (2.94 ± 0.86 eggs/female days) and hatched (1.67 ± 0.59 eggs/female days) the most eggs, more than double the rates of EAB feeding on black (1.39 ± 0.48 laid and 0.75 ± 0.30 hatched eggs/female days) and white (1.08 ± 0.35 laid and 0.65 ± 0.22 hatched eggs/female days) ash. Adults feeding on green ash resulted in the greatest EAB fecundity suggesting that the presence of green ash may promote population growth and provide a pathway to overwhelm other ash species nearby.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":"593-602"},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143968491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The agrobiont wolf spider, Tigrosa helluo (Araneae: Lycosidae), has broad thermal limits and displays consistent temperature preferences in laboratory trials.","authors":"Matthew Sperry, Hailey C Shannon, Ann L Rypstra","doi":"10.1093/ee/nvaf053","DOIUrl":"https://doi.org/10.1093/ee/nvaf053","url":null,"abstract":"<p><p>The arthropod species that invade and persist in disturbed habitats, such as agricultural fields, likely have adaptations that allow individuals to tolerate and/or respond to abiotic extremes. We hypothesized that the agribiont wolf spider, Tigrosa helluo (Walckenaer, 1837) (Araneae, Lycosidae), would have a broad thermal tolerance range and be able to actively select favorable sites within an open landscape. We documented the reactions of juveniles and adult females when released in a hostile arena at low (4 to 7 °C), high (77 to 80 °C), or room temperatures (23 to 26 °C) and recorded the temperature where they settled as a measure of thermal preference. All individuals commenced moving in less than a minute and repeatedly relocated to regions with more amenable temperatures (≈ 20 °C) regardless of their starting point. We also determined the critical thermal maxima (CTmax) and minima (CTmin) of the subjects. The CTmax for adults was between 37 to 48 °C which was significantly higher than the values of 27 to 46 °C obtained for juveniles. The CTmin for adults was 2 to 6 °C which was significantly lower than we recorded for juveniles (between 2 and 7 °C). Taken together, the broad tolerance range, quick reactions to temperature extremes, and consistent thermal preferences displayed by T. helluo likely contribute to their success in disturbed agroecosystems. Both adult females and juveniles can withstand the thermal environment for much of the year and counter extreme temperatures through behavior.</p>","PeriodicalId":11751,"journal":{"name":"Environmental Entomology","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144505164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}