This paper reviews the available information on 67 species of mites (Mesostigmata) from the Democratic People's Republic of Korea. It includes translation and interpretation of data from two papers in the little-known North Korean journal Saengmurhak, including descriptions of 19 new species and four new genera. The families included are Parasitidae, Veigaiidae, Ologamasidae, Macrochelidae, Pachylaelapidae, Phytoseiidae, Haemogamasidae, Laelapidae, Macronyssidae, Dermanyssidae, and Spinturnicidae. The purpose of the paper is to draw attention to this little-known Korean work so it can be incorporated into international studies of these families.

Effect of group size on life table parameters of the two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) was assessed using an age-stage, two-sex life table analysis. One (single), 2 (double), 4 (quadruple), and 6 (sextuple) individuals were placed on leaf discs, under controlled conditions like 25℃, 60-80% RH and a 16L: 8D photoperiod. Leaf discs of varying sizes, e.g., of 8, 11, 16, and 20 mm were used to maintain approximately equal mite densities, allowing us to evaluate the impact of conspecific presence on mite behavior without confounding effects related to density. Both male and female T. urticae successfully completed development under all rearing conditions, confirming that the experimental setup was suitable for subsequent evaluation of density effects on life-history traits and life table parameters. Rearing density significantly affected several life-history traits of T. urticae. The average pre-oviposition period decreased from 2.29 days in singly reared females to 1.66 days in the sextuple group, while oviposition duration increased from 8.29 to 13.62 days. Female longevity and fecundity were highest in the sextuple treatment, with females producing 82.00 eggs compared with 34.45 eggs in the single treatment. Demographic parameters were also significantly influenced by rearing density. The net reproductive rate (R₀) increased from 15.71 in singly reared mites to 45.88 in the sextuple group, and the intrinsic rate of increase (r) rose from 0.1340 to 0.1858 day⁻¹. Similarly, the finite rate of increase (λ) increased from 1.1434 to 1.2042 day⁻¹, indicating enhanced population growth at higher rearing densities. These results demonstrate that rearing density strongly influences life-history traits and population growth parameters of T. urticae, with single rearing producing significantly lower reproductive output and intrinsic growth rates compared with group-rearing conditions. This study underscores the significance of group size on the life parameters of T. urticae, which has potential implications for better pest management.

Dried figs (Ficus carica L.) are a high-value export commodity for Türkiye, particularly from the Aydın and İzmir provinces. Infestations by storage mites, especially Carpoglyphus lactis (L.) and Tyrophagus putrescentiae (Schrank), reduce product quality, promote microbial growth, and frequently result in export rejections. A phosphine-carbon dioxide fumigant (2% phosphine + 98% carbon dioxide; Eco2fume®) is widely used for stored-product pest control worldwide and is commonly applied in dried-fig fumigation for insect management in Türkiye; however, its acaricidal efficacy has not been documented. This study evaluated the effectiveness of this fumigant against C. lactis and T. putrescentiae under commercial fumigation conditions using four concentrations (500, 700, 1000, and 1400 ppm). Fumigation was conducted in industrial chambers at a dried-fig processing facility. Knockdown was assessed immediately after chamber opening (0 h), and mortality and egg hatch were monitored for up to 168 h. At 1000 and 1400 ppm, 100% knockdown and mortality of all mobile stages of both mite species were achieved. At 700 and 500 ppm, high initial knockdown was observed; however, partial recovery occurred after chamber opening, resulting in lower mortality, particularly for C. lactis. No egg hatching was detected at any fumigation concentration, whereas all developmental stages remained viable in the control. These results demonstrate that phosphine–carbon dioxide fumigation at the commercially recommended dose of 1000 ppm can effectively control both mobile stages and egg hatch of C. lactis and T. putrescentiae under realistic industrial conditions.

A detailed diagnosis of Protogamasellopsis Evans and Purvis is presented. Supplementary descriptions of P. corticalis Evans and Purvis and P. denticus (Nasr) are provided based on original observations and newly examined material. Comparative morphological evidence indicates that P. denticus, P. posnaniensis Wiśniewski and Hirschmann, and Rhodacarella cavernicola Moraza are conspecific, with P. denticus having nomenclatural priority. Protogamasellopsis rhizoglyphusi Amin and Khanjani is treated here as a putative synonym of P. denticus. The study also resolves several inconsistencies in previous descriptions and identification keys.

Studying multiple generations provides a more accurate and realistic understanding of how pollen affects phytoseiid mites over time. It is useful to assess potential negative effects on population dynamics, fitness, predatory behavior, and adaptation, which may not be apparent in a single-generation study. In this study, we investigated the effects of cattail pollen on the development, survival, and population growth of Euseius scutalis (Athias-Henriot) from the 1st to the 50th generations (G1–G50) to provide a comprehensive assessment of whether this pollen is a long-term viable diet for E. scutalis. Although the duration of immature development and adult longevity varied among generations, these fluctuations did not follow a clear pattern, indicating overall stability in developmental performance. Several reproductive traits, including APOP, TPOP, oviposition period, fecundity, and sex ratio, also differed among generations but without showing a consistent directional trend. Among life table parameters, including intrinsic rate of increase (r), finite rate of increase (λ), net reproductive rate (R₀), and gross reproductive rate (GRR) were slightly higher in early generations, decreased in G10, remained relatively stable up to G40, and then declined in G50. Offspring sex ratio was generally female-biased, with temporary male bias at the beginning or end of the oviposition period in some generations. Overall, cattail pollen can enhance growth and reproduction in E. scutalis during intermediate generations; however, lower fecundity and reduced population growth in later generations indicate that this diet is not sustainable over the long term (up to 50 generations).

Two new species, Anchigamasus parasiculiger n. sp. and Anchigamasus cribrogynus n. sp. collected in Romania and Southern Austria, respectively, are described. Supplemental data regarding Anchigamasus siculiger (Athias-Henriot, 1967), based on the Hungarian specimens studied originally by Athias-Henriot, are also provided.

A new oribatid mite genus, Khaustovella n. gen. (Oribatida, Scheloribatidae), with type species Khaustovella insolita n. sp., is described from the Cat Tien National Park, southern Vietnam, based on females collected from branches of the different trees. The new genus differs from all genera of Oripodoidea in having one pair of adanal porose areas in a posterolateral position to the anal aperture as well as in the striking reduction of the leg chaetome.

Feather mite specimens (in tubes with 70% ethanol or mounted on permanent slides) stored as museum material in the laboratory of the Department of Parasitology, Faculty of Veterinary Medicine, Selçuk University (Konya, Türkiye) have been examined. These specimens were collected from avian hosts (39 bird species from 11 orders) in seven different provinces of Türkiye in 2009-2021. As a result of the study, 50 species-level and four genus-level taxa of feather mite representing 12 mite families were identified. Among recovered feather mites, 30 species are new records for the feather mite fauna of Türkiye.

The oribatid mite family Oppiidae Sellnick, 1937 is highly diverse globally, but this group is insufficiently studied in Korea. This work deals with four species of oppiids from Korea. Rhinoppia chuleuijungi sp. nov. and Goyoppia heuksandoensis sp. nov. are proposed based on adults, and supplementary descriptions of two little-known species, Graptoppia nukusia (Shtanchaeva, 1984) and G. tanaitica Karppinen and Poltavskaja, 1990 are provided, which are reported for the first time from Korea. All species are inhabitants of the litter and soil of the mixed forests, and aspects of the taxonomy, distribution, and ecology of all species are discussed.

Two new feather mite species of the genus Proterothrix Gaud, 1968 (Proctophyllodidae: Pterodectinae) collected in China from the Red-tailed Laughingthrush Trochalopteron milnei (Passeriformes: Leiothrichidae) are described: Proterothrix papilio sp. n. and P. nanduhensis sp. n. Both new species belong to the paradoxornis species group in having in males seta e of tarsus I lanceolate and aedeagus long whip-shaped. Males of P. papilio have a unique distinctive character within the genus: a pair of stick-like pregenital sclerites; in other species of the genus this sclerite, if present, is represented by single median sclerite. Females of this species have setae h2 with a terminal filament, setae h1 situated at the level of supranal concavity, and genual setae mGI, mGII thick spiculiform. Males of P. nanduhensis have the aedeagus extending beyond lobar apices by almost half its length and the opisthosomal lobes elongated, attenuate to apex, with posterior ends rounded. Females of this species have lateral margins of prodorsal shield with small round incisions in anterior quarter, at level of trochanters I.