The study, published in Nota Lepidopterologica, began in September 2018 when a horticulturist in Székesfehérvár, in central Hungary, submitted a freshly emerged moth from a Leyland cypress. When researchers examined the tree, they found larvae of Lamprodila festiva, a jewel beetle that had erupted in Budapest in 2012 and caused serious damage to ornamental gymnosperms, alongside an unidentified caterpillar. That caterpillar soon died, but it was preserved for genetic analysis. Similar larvae turned up in three neighbouring villages: Velence, Sukoró and Pákozd. DNA sequencing of the immature specimen identified it as C. interscindana, marking the first time this pest had been identified from a larval stage by molecular methods rather than by rearing it to adulthood.

To map the moth’s actual distribution, the team deployed CSALOMON-type pheromone traps originally designed for the codling moth, Cydia pomonella, a technique that had serendipitously produced the first Hungarian record of C. interscindana in Budapest in 2014. The survey started at three sites in 2019, in Zalaegerszeg, Békéscsaba and Kápolnásnyék, then expanded country-wide in 2020 to 18 localities with 21 sampling points in total. Traps operated from mid-May to the end of September, were checked weekly at most sites, and baits were replaced every four weeks. The results confirmed the moth at nine localities between 2018 and 2020, most of them clustered around Székesfehérvár, but with isolated populations in Debrecen and Békéscsaba hundreds of kilometres apart.

That scattered pattern tells a story about how invasive species actually move. Natural range expansion is slow and incremental, but the two isolated eastern populations suggest the moth is hitching rides with humans, most likely on inadequately inspected nursery plants. The researchers point out that when a species is introduced rather than expanding naturally, the propagule pressure is greater and the success of colonisation is correspondingly higher. Alien species also escape the predators, parasitoids and competitors that constrain them in their original Mediterranean habitats, and even where local parasitoids exist, they are unlikely to adapt to a novel host within a short time. The first Hungarian population in Budapest was probably established by imported ornamentals as well, and the authors warn that a country-wide invasion is likely in the near future.

The survey also settled the question of what the moth eats in Hungary. Its original host, the prickly juniper Juniperus oxycedrus, is not native there, but three popular ornamental evergreens are: Leyland cypress (Cupressus × leylandii), Oriental arborvitae (Platycladus orientalis) and Lawson cypress (Chamaecyparis lawsoniana). All 52 examined trees of these three species were infected by C. interscindana, while the beetle L. festiva attacked only 30 of them. Larval counts were highest on Leyland cypress, with 23 larvae recorded across seven localities, followed by 18 on Lawson cypress and 12 on Oriental arborvitae, making the arborvitae the least preferred host. Until now, the beetle had been blamed for essentially all damage on these three genera in Hungary, and control measures had been carried out only against it.

The damage itself is distinctive once you know what to look for. C. interscindana larvae mine along branches and trunks, reaching the phloem, and their tunnels are packed with frass that differs conspicuously from the reddish frass of the co-occurring beetle. Plant tissue around the mines becomes loose, slightly swollen and somewhat sponge-like, a reaction the authors suggest may represent gall induction, with the larva consuming the modified tissue. Because the phloem performs the vital physiological roles of transporting and storing nutrients, attacked plants yellow, fade and dry out, and heavily infested specimens may die. Exit holes of the moth and the beetle’s tunnels at tunnel entrances provide additional diagnostic signs.

The study also filled in the pest’s life history with technical detail previously unavailable. The pupa, described for the first time, is light brown, with rows of tiny but strong teeth along the caudal edge of each abdominal segment dorsally, accompanied by an additional transverse row in the central third of the segment. The caudal end is slightly rounded and nearly truncated, bearing three pairs of narrow, hooked cremastal setae. The pupal stage lasts 10 to 12 days, and the brown exuviae protrude by two-thirds from the wood, where they were found in Velence and Székesfehérvár. Adults of the first generation fly from mid-May to mid- or late June, and those of the second from mid-August until mid- or late September, depending on weather. The two generations do not overlap, and specimens overwinter as mature larvae before pupating in early spring.

Molecular analysis strengthened the identification and clarified the moth’s relationships. The team amplified the 658-base-pair COI barcode region of mitochondrial DNA using the standard Folmer primers, and the final dataset contained 547 aligned nucleotide positions. Remarkably, all three Hungarian specimens, from Székesfehérvár, Budapest and Velence, shared an identical sequence in this region, and that sequence matched an Austrian specimen exactly. In a Maximum Likelihood phylogeny built under the General Time Reversible model with discrete Gamma distribution, the Hungarian and Austrian populations formed a common clade with their closest relative, C. duplicana, from which they differed by a genetic distance of 3 percent, or 17 nucleotides. That value falls squarely within typical species-level differences, and a bootstrap support of 98 percent confirmed the two are not conspecific.

The practical payoff of the barcoding work is considerable. Immature stages of tortricid moths are notoriously difficult to identify from morphology alone, and conventional practice requires rearing larvae through to adults, a slow and failure-prone process. DNA barcodes bypass that bottleneck entirely, allowing a dead or damaged caterpillar to be identified from a small piece of tissue, as happened with the Székesfehérvár larva that died before it could be reared. The sequences have been deposited in GenBank, giving plant health inspectors and researchers elsewhere in Europe a reference tool for detecting this pest at its earliest stages of arrival.

For now, C. interscindana has been confirmed in only four counties of Hungary, but the authors believe it is probably much more widespread, and further survey work is needed to establish its true range. Together with L. festiva, whose abundance in Hungary is increasing due to climatic change, the moth has already caused significant damage, and local populations can serve as sources for further spread. The researchers argue that only strict examination of transported plant materials can slow the invasion, a conclusion that echoes a broader lesson of invasion biology: by the time an emerging pest is noticed in gardens, the trade pathways that carried it have usually delivered it to many other places as well.

Subject of Research: Bionomics and host plants of the invasive Cydia interscindana (Möschler, 1866) (Lepidoptera, Tortricidae), an emerging pest in the Carpathian Lowlands

Article Title: Bionomics and host plants of the invasive Cydia interscindana (Möschler, 1866) ( Lepidoptera , Tortricidae ), an emerging pest in the Carpathian Lowlands

Article References: Takács, A., Szabóky, C., Tóth, B., Bozsó, M., Kutas, J., Molnár, S., Farkas, G., Erdélyi, K., Tunyoginé Búzás, I., Hargitai, C., Terman, N., Menyhárt, A., Bodnár, S., Gajdos, É., Bogya, S., Csabai, J., Molnár, B., & Nagy, A. (2022). Bionomics and host plants of the invasive Cydia interscindana (Möschler, 1866) (Lepidoptera, Tortricidae), an emerging pest in the Carpathian Lowlands. Nota Lepidopterologica, 45, 53-64. https://doi.org/10.3897/nl.45.74236

Image Credits: AI Generated

DOI: 10.3897/nl.45.74236

Keywords: Bionomics, host, plants, invasive, Cydia, interscindana, schler, Lepidoptera, Tortricidae, emerging, pest, Carpathian

The genus Anthonomus is a giant among weevil lineages, boasting more than 500 described species and holding the title of the largest genus in the tribe Anthonomini. Roughly 400 of these species live in the Neotropics, while 73 occur in the Palaearctic, with smaller numbers scattered across the Afrotropics, the Oriental Region and the Australian and Pacific Regions. These are small to medium-sized beetles, measuring between 1.7 and 5.0 millimetres, equipped with elongate rostra, long antennae, somewhat convex eyes and characteristic teeth on the pro- and mesofemorae. Most species feed on dicotyledonous plants, with larvae developing inside flower buds and pupation taking place either in the buds or, more rarely, in the soil. A few oddballs develop in conifer flowers or live as inquilines inside galls produced by moth larvae.

What makes the new study remarkable is just how little is known about the juvenile stages of this speciose group. Morphological descriptions of immature Anthonomini exist for only around 10 percent of the species, and while that compares favourably with other large genera, entire subgenera remain completely undocumented. Landmark works by Burke in 1968, which described the pupae of 47 species, and by Ahmad and Burke in 1972, along with Burke and Gates in 1974, laid the foundation, and more recent contributions by Zabaluev in 2021 added first descriptions of several Palaearctic species. Yet according to Zabaluev, the bionomics, the full biology and life history, of fewer than 12 percent of Palaearctic Anthonomus species have ever been studied. Against that backdrop, a complete description of both larva and pupa of A. brunnipennis represents a significant addition.

The specimens came from two very different German landscapes. In June 2022, the researchers collected nine larvae of various instars and four pupae from flowers of Potentilla erecta, the common tormentil, in nutrient-poor, partly wet mountain meadows in the National Park Harz near Drei Annen Hohne in Sachsen-Anhalt. Some larvae were reared through to adulthood in the laboratory so that the species identity could be confirmed using established morphological criteria. The second site lies in the Hechtmoor peat bog in Mittelangeln, northern Schleswig-Holstein, where the weevil shares its habitat with bog plants such as Calluna vulgaris, Comarum palustre, Erica tetralix, Sphagnum mosses and cranberry. Together, the two sites span the ecological range of the species in Germany, from wet mountain meadows of the Junco acutiflori-Molinietum and Crepido-Juncetum acutiflori types to genuine raised bog conditions.

The mature larva itself is a strikingly detailed piece of biological engineering. Measuring just 2.46 to 2.66 millimetres long, with a body width of 0.70 to 0.83 millimetres and a head capsule of 0.53 to 0.56 millimetres, the living larva is yellowish with a light brown head. Its body is strongly curved and rounded in cross section, with a prominent prothorax and abdominal segments that taper towards the rear. All spiracles are bicameral, and the cuticle is densely covered with nodular asperities. Using optical stereomicroscopy, scanning electron microscopy and slide preparation techniques involving potassium hydroxide clearing and Faure-Berlese mounting medium, the authors mapped out the complete chaetotaxy, the precise arrangement of sensory setae, across the head, thorax and abdomen, documenting everything from the single stemma on each side of the head to the ten apical sensilla on the terminal receptive area of the maxillary palp.

The pupa proved equally informative. Yellowish and stout, at 1.90 to 2.30 millimetres in length, it bears a very elongate rostrum six times as long as wide, a trapezium-shaped pronotum with a distinct prothoracic depression, and fused urogomphi at the terminal segment whose apices curve outward. Setae sit on conical or thorn-like protuberances across the body, and the pupa shows clear sexual dimorphism: female gonothecae are divided with tubercles on subcontiguous lobes, while those of males are undivided. Spiracles on the abdomen are functional on segments one to five and vestigial on the sixth. Such features matter because they are the raw material for identifying species that adults alone cannot reliably separate.

That identification problem is at the heart of the study. Adults of A. brunnipennis are notoriously similar to those of its sibling species A. rubi, the strawberry blossom weevil, and the two can be told apart only by subtle characters such as body size with overlapping ranges, the configuration of light longitudinal fields on the aedeagus, aedeagal length, and the slenderness of the first and second antennomeres of the funicle. The new work demonstrates that the immature stages, by contrast, differ distinctly. The larva of A. brunnipennis has a brown head with three postepicranial and two ventroepicranial setae, ten pronotal setae, a single cluster of four epipharyngeal sensilla pores and two-segmented labial palps, whereas the larva of A. rubi has a yellowish head with four postepicranial setae and none ventroepicranial, eleven pronotal setae, two separate sensilla clusters and one-segmented labial palps. The pupae differ in rostral setae, head setae, the number of dorsal setae on the abdominal segments and the structure of the urogomphi.

These differences carry evolutionary weight. Zabaluev had proposed dividing Anthonomus into five species groups based on preimaginal morphology, placing A. rubi in group 3 alongside A. rubripes. Intriguingly, despite the close resemblance of the adults, the larva of A. brunnipennis lacks the hallmarks of that group, and its pupa shows features such as prothoracic depressions and superorbital setae that point elsewhere. In fact, both the larva and pupa of A. brunnipennis possess characters found almost exclusively in Nearctic, that is North American, species, including the single sensilla cluster, two-segmented labial palps, prothoracic depression and alternating setal lengths on the pupal abdomen. The authors conclude that the species group division within the genus requires redefinition, a reminder that juvenile morphology can rewrite the family tree drawn from adults alone.

Perhaps the most consequential finding concerns diet. Literature going back to Hoffmann in 1954 lists Comarum palustre, Dryas octopetala, Filipendula ulmaria and Potentilla erecta as host plants, and one record even places the weevil on Helianthemum, a genus in an entirely different plant family. The new review finds that only Potentilla erecta is well documented, and Hoffmann’s original account overlooked the main host altogether, undermining the reliability of his host plant data. In Schleswig-Holstein, the weevil was found only on tormentil even where Comarum palustre grew nearby, and current British sources list only Potentilla erecta. A barcoding study of Alpine populations collected from Helianthemum and Dryas found no differentiation from A. rubi, and the authors recommend that Cistaceae be struck from the host lists of both species. Claims about other hosts, they argue, should be accepted only when backed by records of larvae or observed oviposition.

The ecological picture that emerges is of a stenotopic, hygrophilous specialist, tied to cold, wet, nutrient-poor sites such as swamps, bogs, mountain meadows and moorlands. Unlike its ubiquitous relative A. rubi, A. brunnipennis survives at only a few sites with a high degree of naturalness, particularly at the southern edge of its range in central Europe, where it is confined to national parks and reserves. Those ecosystems face mounting pressure from atmospheric nitrogen deposition, which alters vegetation composition, and from climate warming, with drought and rising temperatures pushing cold-adapted wetland species ever closer to the margins. The weevil is already classified as highly endangered in Germany and may qualify for similar status in other countries along its southern range boundary. In describing the hidden stages of its life, the study provides not just taxonomic housekeeping but a diagnostic toolkit, one that conservationists can now use to confirm the presence of a rare insect whose fate is bound to the survival of Europe’s vanishing wet meadows and bogs.

Subject of Research: Immature stages and host plant biology of the weevil Anthonomus brunnipennis

Article Title: Description of the immature stages and bionomics of Anthonomus ( Anthonomus ) brunnipennis Curtis, 1840 ( Coleoptera , Curculionidae , Anthonomini )

Article References: Gosik, R., & Sprick, P. (2024). Description of the immature stages and bionomics of Anthonomus (Anthonomus) brunnipennis Curtis, 1840 (Coleoptera, Curculionidae, Anthonomini). Deutsche Entomologische Zeitschrift, 71(2), 303-318. https://doi.org/10.3897/dez.71.129867

Image Credits: AI Generated

DOI: 10.3897/dez.71.129867

Keywords: Anthonomus brunnipennis, Curculionidae, weevil, larval morphology, pupa, chaetotaxy, Potentilla erecta, host plants, wetland conservation, bionomics, Anthonomini, sibling species

Researchers Rohit Rohit and Anjali Dhar of the Department of Zoology at Central University of Jammu surveyed six orchard sites spanning 1,073 to 2,302 meters above sea level during the 2025 blooming season. Using a combination of passive pan trapping with ultraviolet-bright blue, yellow, and white bowls and nearly one hundred hours of timed focal observations at flowering trees, they recorded 847 individual floral visitors belonging to 13 species across 10 families and 4 orders. The assemblage included six bee species, four species of hoverflies, and three butterflies, with the western honey bee Apis mellifera, the sweat bee Lasioglossum moroi, the Asiatic honey bee Apis cerana indica, and the drone fly Eristalis tenax together dominating the counts.

The most striking finding is the strength of the relationship between elevation and diversity. Shannon diversity declined in an almost perfectly linear fashion with altitude, with elevation explaining 91.3 percent of the variation in the diversity index. Total abundance fell by 71.8 percent across the gradient, from 238 individuals at the lowest site to just 67 at the highest, while species richness dropped from 13 to 5. The authors caution that elevation and temperature were nearly perfectly collinear in their dataset, with temperatures falling roughly 9.5 degrees Celsius over the 1,229-meter span, so the pattern reflects the composite elevational thermal environment rather than either factor alone. Temporal sampling waves, in which high sites were visited later in the season, add a further phenological confound that the team explicitly acknowledges.

Beneath the aggregate decline lies a pronounced taxonomic reshuffling. Social Apid bees, which made up 39.7 percent of visitors at low elevations, fell to 22.2 percent at high elevations, an absolute decline of 76 percent driven by losses of both honey bee species. Halictidae, represented solely by the sweat bee Lasioglossum moroi, nearly doubled their relative share, rising from 18.1 to 38.2 percent while maintaining near-stable absolute numbers. Hoverflies also held their proportional ground, and the authors attribute this resilience to multivoltine life cycles, larvae that develop in aquatic or aphid-rich habitats decoupled from orchard flowers, and the ability of several species to forage at temperatures as low as 8 to 10 degrees Celsius.

Life-history traits appear to explain much of this filtering. Perennial honey bee colonies demand continuous forage across a long season, conditions that collapse as elevation compresses the bloom window and thins floral diversity. In contrast, Lasioglossum moroi combines flexible sociality with ground nesting, which buffers nests against cold, and can shift to a single generation per year at altitude. Strictly solitary, univoltine bees such as Osmia cornuta and Anthophora confusa vanished from the highest site, consistent with their narrow thermal requirements for emergence. Habitat measurements reinforced the story: bare ground cover, essential nesting substrate for ground-nesting sweat bees, increased with elevation and correlated strongly with L. moroi abundance, while declining non-crop floral richness tracked the disappearance of solitary bees that need diverse forage during their brief adult lives.

At the single site where apple and apricot co-flowered under identical conditions, the team uncovered a clear division of labor. Apid bees accounted for 43.9 percent of apple visits but only 27.1 percent of apricot visits, with both honey bee species showing statistically significant preferences for apple. Hoverflies showed the mirror-image pattern, contributing 42.2 percent of apricot visits against 24.5 percent on apple, with the drone fly Eristalis tenax displaying the strongest crop preference of any species. The generalist sweat bee visited both crops in equal measure. The authors suggest that apple’s larger flowers and higher nectar sugar concentrations suit energy-hungry social bees, while apricot’s nectar volume and volatile profile may better attract olfactory-guided hoverflies, though direct floral trait measurements will be needed to confirm the mechanism.

Behavioral effectiveness scores, combining visit duration with the frequency of stigma contact, pointed to functional complementarity between the two pollinator groups. Honey bees achieved their highest scores on apple, where they contacted stigmas in 78 percent of visits compared with 62 percent on apricot, while all four hoverfly species scored higher on apricot, with E. tenax recording 16.8 versus 10.2 on apple. Overall mean scores were higher on apricot, driven by the extended visits of syrphid flies. The researchers stress these are visitation-based behavioral proxies rather than measured pollen deposition, and confirming actual pollination efficiency would require single-visit pollen assays. Even so, the pattern implies that keeping both crops in the landscape sustains two complementary pollinator guilds.

Network analysis added a structural dimension to the elevational story. High-elevation interaction networks, built from just 8 pollinator and 6 plant species, were more modular and more specialized than their low-elevation counterparts, with modularity rising from 0.38 to 0.46 and network-level specialization from 0.39 to 0.61. Niche overlap among species, measured with Pianka’s index, was significantly lower at high elevations, 0.31 versus 0.58, consistent with intensified resource partitioning when few species share scarce flowers. Within these simplified networks, Lasioglossum moroi emerged as the critical connector, showing the highest degree and species strength and the lowest specialization of any taxon, bridging network modules that would otherwise remain isolated. The authors warn that losing this single species could disproportionately fragment high-altitude pollination webs.

The conservation implications are elevation-specific rather than uniform. At low elevations, the authors recommend wildflower strips to sustain non-crop forage, careful timing of pesticide applications away from peak morning visitation hours, and preservation of dead wood and hollow stems for cavity-nesting solitary bees. At mid-elevations, maintaining a mosaic of both apple and apricot may support transition-zone communities that could serve as refugia under warming. At high elevations, where barely five or six pollinator species persist, priorities include minimizing soil disturbance to protect sweat bee nesting substrate, retaining water features and leaf litter for hoverfly larvae, and ensuring at least one wildflower species blooms throughout the compressed growing season. The strong elevation-diversity relationship also offers a quantitative baseline: repeated surveys at the same six sites could detect the upward range shifts and community disassembly expected as Himalayan winters warm and apple cultivation itself climbs ever higher in search of suitable chill.

Subject of Research: Elevational changes in insect pollinator communities and their interactions with apple and apricot trees in Himalayan orchards

Article Title: Bionomics of insect pollinators and their interaction with host trees in the orchards of Doda, Indian Himalayas

Article References: Rohit, R., & Dhar, A. (2026). Bionomics of insect pollinators and their interaction with host trees in the orchards of Doda, Indian Himalayas. Discover Ecology, 2(1), Article 24. https://doi.org/10.1007/s44396-026-00040-1

Image Credits: AI Generated

DOI: 10.1007/s44396-026-00040-1

Keywords: pollinators, Himalayas, apple orchards, apricot, elevational gradient, bees, hoverflies, plant-pollinator networks, niche overlap, pollinator conservation, Doda, bionomics