Many species of spittlebugs (Auchenorrhyncha: Cercopidae) use sugarcane and other grasses as host plants, and when damage is extensive they are considered pests leading tom economic losses. Mahanarva fimbriolata and Mahanarva spectabilis are the most common in sugarcane and can be distinguished mainly by genital morphology. Recently, another morphotype of Mahanarva occurring in sugarcane fields that did not match the morphologies of either of these Mahanarva species mentioned above has been widely collected in Brazil, raising doubts on the identification of Mahanarva species using sugarcane. Accurate specimen identification is critical for sugarcane pest management, because misidentifications can lead to economic losses and inefficient control strategies. Thus, we combined morphology, geometric morphometrics, and molecular techniques to investigate the hypothesis that this morphotype could be considered a new species of Mahanarva. Morphological analyses included examination of male genitalia and tegminal colouration patterns. We also quantified hindwing shapes using geometric morphometrics; and performed a phylogenetic analysis using the mitochondrial COI gene. Morphological evidence distinguished the new morphotype through unique traits in male genitalia. Geometric morphometrics reliably separated species, with over 89% classification accuracy. Molecular analyses confirmed the morphotype as a distinct lineage closely related to M. fimbriolata and M. spectabilis. Thus, we describe M. diakantha sp. n., demonstrating the effectiveness of an integrative approach in resolving taxonomic challenges. Additionally, we provide formal diagnoses for M. fimbriolata and M. spectabilis. This work underscores the importance of precise taxonomy in agroecosystems, supporting sustainable pest management practices.

Parasitoids are effective biocontrol agents against Spodoptera frugiperda. Here, we studied four egg parasitoids (Trichogramma chilonis, Trichogramma pretiosum, Trichogrammatoidea bactrae, and Telenomus remus) on S. frugiperda eggs under laboratory conditions [25 ± 1 °C, 70 ± 5% RH, 14/10-h (L:D) photoperiod]. Then, Tr. chilonis (the best trichogrammatid species in the laboratory) was studied inside cages (1 m × 1 m) under maize-field conditions. Egg-to-adult periods (days) were recorded among different species, with Te. remus having the longest (10.00 ± 0.89 days) and Tr. bactrae the shortest (7.80 ± 0.66 days) periods. Furthermore, Te. remus exhibited the greatest adult longevity (days) for both males and females, with and without food. Lifespan parasitism under laboratory conditions was the highest for Te. remus (73.60 ± 7.23 eggs), followed by Tr. chilonis (45.40 ± 2.56 eggs) and Tr. pretiosum (42.00 ± 3.70 eggs). Adult emergence (%) was always higher than 90% and the sex ratio was higher than 0.60 for the studied egg parasitoid species. In the cage experiments set up in uncontrolled field conditions, different release densities of Tr. chilonis (50,000, 100,000, and 150,000 parasitoids/ha) were studied. Release densities of 100,000 and 150,0000 parasitoids per hectare were the most effective rates for managing S. frugiperda, with recorded egg parasitism of 71.36% and 72.88%, respectively. These findings provide crucial insights into the biological attributes and parasitism potential of these parasitoids, indicating the optimal release density of 100,000 Tr. chilonis/ha as an integrated pest management strategy against S. frugiperda in maize ecosystems.

A survey was conducted among teak and melina growers across Costa Rica to assess their perceptions of problematic weed species and to document current weed management practices in forest plantations. A total of 180 farmers were selected from six provinces, yielding an 87% response rate. Results revealed that 47% of respondents had established plantations on formerly forested land, while 43% did so on previously used pastureland. Most farmers employed an integrated approach toward weed management that included manual, mechanical, and chemical methods. The most problematic species cited most frequently included coyol palm, jaraguagrass, orchid vine, raspa guacal, and arrocillo. Herbicide use was widespread, with glyphosate, metsulfuron-methyl, and paraquat being the most common active ingredients, typically applied singly, in mixtures, or sequentially. The findings reveal a heavy reliance on only three herbicides and highlight the need for targeted control of species in the Poaceae family and climbing vines. This work contributes valuable insights into weed dynamics in tropical forest plantations and emphasizes the need for region-specific and sustainable management strategies to mitigate potential productivity constraints and reduce reliance on herbicides.

Sabellaria miryaensis is capable of growing massive reefs of several meters long in the subtidal area. However, no occurrence of S. miryaensis has been recorded in the Arabian Sea since its original description in 1990. This manuscript presents a new record of S. miryaensis in the Bay of Bengal, confirming its presence there. In addition, details on its ecology, including environmental parameters and the associated benthic biodiversity of S. miryaensis reefs are included. Four 1-m2 quadrat samples were collected from subtidal sabellariid reefs (∼15 m depth) off Gopalpur in March 2024, and associated macrofauna were preserved in 5% formalin for taxonomic analysis. Water parameters (temperature, salinity, and pH) and sediment texture were measured using standard field and laboratory protocols. The reef built by this species supports high macrofaunal and meiofaunal diversity, particularly polychaetes and other invertebrates. Morphological analysis confirms its identity with minor intraspecific variations. The reef also serves as a critical habitat for commercially important fish, underscoring its ecological and economic value. These findings highlight the need for further ecological assessments and conservation of sabellariid reef ecosystems in Indian coastal waters.

The fall armyworm, Spodoptera frugiperda (J.E. Smith), is a major invasive pest threatening maize production in India. Temperature strongly influences its development, reproduction and population dynamics. This study evaluated the biological performance of S. frugiperda on maize across seven constant temperature regimes (14 ± 1°C to 38 ± 1°C) under controlled laboratory conditions, using the age-stage, two-sex life table approach. Developmental time decreased significantly with rising temperatures, while survival and fecundity peaked at 26 ± 1°C and 30 ± 1°C. The highest values of net reproductive rate (R0 = 499.91 females/female), intrinsic rate of increase (rm = 0.25 females/female/day), and finite rate of increase (λ = 1.28 females/day) were recorded at 30 ± 1°C, followed by 26 ± 1°C (R0 = 467.32, rm = 0.24, and λ = 1.26, respectively). In contrast, thermal extremes delayed development and adversely affected both survival and reproduction. No development occurred at 38 ± 1°C. Population projections indicated rapid generational turnover at optimal temperatures, with up to nine generations annually at 26 ± 1°C. The temperature range of 26–30 ± 1°C was found to be optimal for both survival and reproduction of S. frugiperda, aligning with kharif season temperatures in North India, particularly Punjab. These conditions promote multiple generations annually, whereas extreme summer or winter temperatures may limit population development. The findings advocate for temperature-informed, location-specific pest control strategies. Intervening during critical developmental windows, especially at the egg and larval stages, can limit population buildup. Insights into the pest’s thermal adaptability contribute to the advancement of climate-resilient, sustainable pest management frameworks for maize systems in North India and similar agroclimatic regions.

Sporobolus natalensis (Steud.) T. Durand & Schinz. and Sporobolus pyramidalis P. Beauv., generally known as giant rat’s tail grasses, are two significant weed species that invade summer fields and pastures in the eastern regions of Australia. This study was conducted to examine seed germination behavior, seedling emergence, and the response of these species to various herbicides. Seed germination and seedling emergence were assessed in response to environmental factors, including alternating temperature regimes (15/5, 20/10, 25/15, 30/20, and 35/25 C), light conditions (dark and light/dark), osmotic potentials (0, −0.1, −0.2, −0.4, −0.8, and −1.6 MPa), and seed burial depths (0, 0.5, 1, 2, and 4 cm). Furthermore, the efficacy of several post-emergence herbicides was evaluated in pots under outdoor environmental conditions. Germination was higher under light/dark (12-h light/12-h dark) conditions than under continuous darkness (24 h). The seeds of both species exhibited significantly higher germination (>95%) under 12-h light at higher temperatures (35/25 C) compared with low (20/10 C) or medium (25/15 C) temperatures. The osmotic potential required to inhibit 50% of maximum germination was −0.77 MPa for S. natalensis and −0.59 MPa for S. pyramidalis. Seedling emergence decreased with increasing burial depth, with no emergence observed from seeds buried at depths of 4 cm. Applying herbicides significantly reduced both species’ seedling survival and dry matter. The most effective herbicides for controlling spring-germinated S. pyramidalis and S. natalensis were haloxyfop, clethodim, butroxydim, glyphosate, glufosinate, and paraquat, which provided satisfactory control of both species. The findings from this study can be used to develop effective management strategies for controlling S. pyramidalis and S. natalensis in agricultural systems.

Sir Ernest Shackleton’s ship, Endurance, was crushed by Antarctic sea ice and sank in November 1915. Since then, it has been widely considered that Endurance was the strongest polar ship of its time and was lost because ice tore away the rudder. Based on expedition diaries, Shackleton’s correspondence, and structural analysis, this paper shows that Endurance was not among the strongest ships of its time and that the rudder was not the main cause of the vessel sinking. While the final reason was tearing off the keel, Endurance sank because the vessel was simply crushed in compression by ice. This is not surprising, Endurance was not designed for compressive conditions in the Antarctic pack ice, but for easier conditions at the ice edge in the Arctic. The weakest part of its hull was the engine room area, which was not only larger than in other early Antarctic ships but also lacked beams to give strength against compression by ice. Comparison with other wooden polar ships is not favourable for Endurance: ships designed for compressive pack ice were stronger. It is also evident from archive research that Shackleton was well aware of the weaknesses of Endurance even before his expedition set sail for Antarctica.

This descriptive and exploratory observational case series examined intestinal colonisation and subsequent bacteraemia due to ESBL-producing Klebsiella pneumoniae (ESBL-Kp) in preterm neonates in Morocco. Prospective bacteriological cultures and antibiotic susceptibility testing were supported by phenotypic methods, including Brilliance ESBL Agar and the NG-Test CARBA-5 assay, for the rapid detection of ESBL and carbapenemase producers. Molecular analysis using PCR was also undertaken to identify specific resistance genes. A total of 567 rectal swabs were collected from 339 preterm neonates, yielding 293 K. pneumoniae isolates. ESBL-producing strains were identified in 53.6% of the neonates (182/339). Detected resistance genes included blaSHV (26.3%), blaCTX-M-1 (42.8%), blaTEM (30.2%), blaOXA-48 (50.0%), blaNDM(15.3%), and blaVIM (4.9%). Principal risk factors for colonisation were low birth weight (OR 1.69), very preterm birth (OR 6.24), enteral tube feeding (OR 2.02), and prolonged use of third-generation cephalosporins (OR 1.26). Among the neonates studied, 32 (9.4%) developed healthcare-associated bacteraemia, with 56.2% of these cases preceded by intestinal colonisation with ESBL-Kp. Clinically, severe respiratory distress and alveolar haemorrhage were strongly associated with increased mortality (aRR = 29.32 and 4.45, respectively). The findings highlight the clinical importance of early screening to guide infection control and antimicrobial stewardship in neonatal intensive care settings.

This study was conducted to evaluate the supplementation of anionic salt products to pre-partum diets on dry matter (DM) intake, nutrient digestibility, blood metabolites and milk composition of cows during the transition period. Twenty-four Holstein cows [614 ± 21.3 kg body weight (BW) and 2.0 ± 0.9 parity number] were blocked by parity and expected calving date and randomly assigned to the following treatments: Animate (ANI), anionic salts (Animate, Phibro Animal Health, Teaneck, US) fed at 2.85 %DM; or Meganion (MEG), anionic salts (MegAnion, Barentz Animal Nutrition, Hoofddorp, The Netherlands) fed at 1.85 %DM. Treatments targeted -150 mEq/kg diet DM and were provided starting at 30 d of the expected calving date. Treatment effects were evaluated until 56 days in milk. Pre-partum diets presented -55.9 and -32.1 mEq/kg diet DM for ANI and MEG, respectively. Dry matter intake and BW were similar across treatment groups during the pre-partum and post-partum periods. Post-partum body condition score (BCS) tended to be greater for MEG. Pre-partum urine pH was similar between treatment groups (6.33 and 6.49 for ANI and MEG, respectively). Cows fed MEG had greater neutral detergent fibre digestibility on weeks 5 (53.2 vs. 49.8 %) and 6 (53.5 vs. 49.6 %) of lactation than ANI. Serum concentration of Mg was greater in cows fed MEG during the pre-partum. No treatment differences were found for blood concentrations of ionised Ca, non-esterified fatty acids, beta-hydroxybutyrate or insulin. Milk yield was not affected. Both anionic salts maintained adequate calcium metabolism during the transition period and resulted in similar performance.

Russia’s full-scale invasion of Ukraine profoundly disrupted Arctic governance, challenging the long-standing notion of Arctic exceptionalism and creating enduring turbulence. While scholarly debate has largely focused on geopolitical and institutional consequences, the local-level impacts remain underexamined. This study investigates adaptive governance (AG) responses to the war’s effects in Norway’s northernmost counties, Troms and Finnmark, which share a direct border with Russia. The analysis draws on the concepts of crisis, turbulence, and AG, situating them within broader scholarship on how decision-making сenters respond to crises and turbulence and political adaptation. It examines stakeholder responses across four key domains: civilian preparedness, international cooperation, infrastructure development, and the economic repercussions of sanctions. Based on 19 semi-structured interviews, policy documents, and media analysis, the study reveals both adaptation and persistent challenges shaped by pre-existing governance structures, demographic and economic conditions, and past cooperation with Russia. The study contributes to AG literature by unpacking the interplay between strategies, highlighting structural constraints, and demonstrating how geopolitical disruptions shape local governance in strategically significant environments.

Cereal rye (Secale cereale L.) is grown as a cover crop due to its ability to enhance soil health and suppress weeds through allelopathy, but germination responses of different weed species to allelochemicals have not been studied for seeds varying in age and consequently vigor. This study investigated the allelopathic effects of cereal rye on the germination of Palmer amaranth (Amaranthus palmeri S. Watson), large crabgrass [Digitaria sanguinalis (L.) Scop.], giant foxtail (Setaria faberi Herrm.), and lettuce (Lactuca sativa L.). Seeds were germinated in vitro in media with allelochemicals secreted by roots of cereal rye lines varying in allelopathic activity. Seeds were subjected to an accelerated aging treatment to modify their vigor. Results showed that aged seeds exhibited 31% lower germination than non-aged seeds. The magnitude of the germination reduction due to the presence of allelochemicals was species dependent. In the absence of allelochemicals, L. sativa exhibited a 20% reduction in germination due to aging, while the reduction was greater than 60% when allelopathy and aging were combined. Non-aged S. faberi seeds increased germination under low allelopathy conditions, with 20% greater germination compared with the non-treated control. Digitaria sanguinalis did not respond to seed aging, and the high allelopathy treatment reduced germination less than 10%. Amaranthus palmeri exhibited the highest germination and was the only species that was not affected by the seed aging and allelopathy treatments. Germination rate was reduced by seed aging and to a lesser extent by allelochemicals. Results suggest that incorporating allelopathic S. cereale varieties in cover crop rotations can reduce weed populations. However, the age structure of the seedbank might determine the importance of allelochemicals for emergence at the species level, likely causing weed community shifts.