Observations on the life cycle of<i>Chaetodactylus osmiae</i>(Dufour, 1839) (Acari: Chaetodactylidae) parasitic on the solitary bee,<i>Osmia rufa</i>(L.), 1758 (Insecta: Hymenoptera) in Belgium

Asselt, Laurent Van

doi:10.1080/01647950008684192

Cited by 5 publications

(7 citation statements)

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“…osmiae neither synaptonemal complexes nor clonal groups of germinal cells were found. This confirms the suggestion by Stanisavljević (1996) that the species is haplo-diploid (with haploid males), which is in contrast to Chmielewski's opinion (Chmielewski 1993) that the species is diplo-diploid.…”

Section: Discussionsupporting

confidence: 89%

“…Chaetodactylus osmiae has several life stages (egg, protonymph, deutonymph, tritonymph, adult male/female) (Michael 1903;Fain 1966;Van Asselt 2000), but most peculiar for the genus is the deutonymphal stage which can be observed in two morphotypes, an immobile form within the protonymphal exuvium and a mobile form, the so-called heteromorphic deutonymph (hypopus) (for further details see : Stanisavljević 1996;Krunić et al 2005). The immobile deutonymph develops before autumn and allows the survival of mites through the colder part of the year, whereas the mobile deutonymph is a dispersal stage and uses phoresy to colonize new areas and hosts.…”

Section: Introductionmentioning

confidence: 99%

“…Many experimental observations on Ch. osmiae biology were provided by Chmielewski (1993) and Stanisavljević (1996).…”

Section: Introductionmentioning

confidence: 99%

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Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees

Rożej-Pabijan

Witaliński

2018

Acarologia

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Chaetodactylus osmiae (Dufour, 1839) is a mite parasitizing the solitary bee - Osmia rufa L.- used as a commercial pollinator. In this study we present the anatomy of female and male reproductive systems of this species as well as its gonadal structure and gametogenesis at the ultrastructural level. The reproductive systems are similar to those of other Astigmata. The ovaries are paired and each contains germ-line cells – a giant nutritive ovarian cell connected via funnel-type intercellular bridges to oogonia and previtellogenic oocytes. Germinal cells are embedded in several large somatic stroma cells. Remarkable numerous protrusions of the nutritive ovarian cell penetrate into the stroma cell cytoplasm. Conspicuous ER cisterns run close and parallel to the surface of the germinal cells. Oocytes entering vitellogenesis disassociate with the nutritive cell and a vitelline envelope composed of heterogeneous material appears on their surface. When vitellogenesis is completed, the oocytes are full of lipid droplets and two types of yolk spheres; the vitelline envelope transforms into a thin and homogeneous chorion.Paired testes are located on one side of the body, whereas the opposite side is filled by a male accessory gland. In testis, germinal cells are embedded in a few somatic stroma cells. The earliest spermatogonia form a compact germarium, whereas later stages are dispersed randomly within the testis. Spermatocytes are characterized by a superficial spongy layer, formation of mitochondrial derivatives, loss of nuclear envelope and condensation of chromatin in threads. A single electron-dense lamella appears during the spermatid stage, separating chromatin threads from a large spongy body surrounded by arcuate, double-membrane bounded cisterns. In spermatids, the superficial spongy layer is absent. The testicular central cell in the germarium and structures related to meiotic division were not observed in the testes. Spermatozoa are multiform cells (approx. 4x11µm) containing electron-dense lamella (ca. 45 nm thick) surrounded by mitochondrial derivatives which separate chromatin threads 45-50 nm thick from remnants of the spongy body i.e. arcuate cistern profiles. Spermatozoa deposited in female spermatheca are more electron dense; the electron-dense lamella is deeply folded several times, whereas chromatin threads are present in the center of the spermatozoon and are either flanked by lamella folds or located more peripherally under the plasmalemma. Remnants of the spongy body are not discernible.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees

Rożej-Pabijan

Witaliński

2018

Acarologia

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“…Therefore, reed stalks seem to be a good nesting material due to its cheap availability, as well as the very low mobility of Ch. osmiae mite, because each cell with larva and pollen is strictly separated from others (Krunić et al, 2005;Asselt, 2009). On the other hand, reeds can be a problem for large breeders due to the labour-intensive extraction and cleaning of the cocoons (unpubl.…”

Section: Discussionmentioning

confidence: 99%

Nesting Efectiveness of Red Mason Bee Osmia rufa (L.) in Reed Stalk Phragmites australis (Cav.)

Michołap¹,

Cierpisz

Sikora³

et al. 2020

Journal of Apicultural Science

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The research enabled the optimal parameters of reed stalks Phragmites australis (Cav.) Trin. ex Steud, to be determined and then be used for rearing red mason bees (Osmia rufa L.). During research conducted in 2015 and 2016, 3,293 reed stalks were occupied by red mason bees, and 19,461 nest cells were counted in the stalks, of which there were 16,222 non-parasitized larvae. The mean weight of one cocoon was 0.085 g. The mean length of the reed stalk occupied by the red mason bee was 169.45 mm, its mean diameter was 6.11 mm and the mean number of cells in the reed was 5.47. The mean length of the first cell, the vestibulum, was 38.38 mm. The mean degree of parasitism was 0.16. The length of the reed stalk positively correlated with the number of cells in the reed nest (r=0.543), vestibulum length (r=0.392) and cocoon mass (r=0.362) The diameter of the reed positively correlated with the mass of the cocoon (r=0.536), the number of cells in the reed (r=0.406) and vestibulum length (r=0.254). Correlation between degree of parasitatism and length, and diameter of the reed was insignificant. Reed stalks with a length of 150 to 200 mm and a diameter of 5–7 mm are recommended for the choice of red mason bee nesting material.

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“…Two other related mite species attack Osmia nests in other regions. Cybocephalus nipponicus (Kurosa) has been reported from Japan, where it is known to be a major pest of O. cornifrons, managed for apple pollination [1,10,11], and C. osmiae (Dufour) is a pest of O. rufa in Belgium [12].…”

Section: Introductionmentioning

confidence: 99%

Nest Modification Protects Immature Stages of the Japanese Orchard Bee (Osmia cornifrons) from Invasion of a Cleptoparasitic Mite Pest

Joshi

Naithani

Biddinger

2020

Insects

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Osmia cornifrons (Radoszkowski) (Hymenoptera: Megachilidae) is an effective orchard pollinator. Considering the honey bee population decline in recent years, the conservation and propagation of O. cornifrons as an alternative managed pollinator is important in ensuring adequate pollination of tree fruit crops in the eastern United States. A field study was conducted to determine if nest modifications could reduce mite parasites and parasitoid natural enemies that attack managed O. cornifrons. Paraffin-coated paper liners (straws) were added to create modified nests, and were compared with the unmodified nests (i.e., nests without paper liners). In each nest, we recorded the number of nest cells with cleptoparasitic mites Chaetodactylus krombeini (Baker), and the presence of a parasitoid wasp Monodontomerus obscurus (Westwood). We also recorded the number of cocoons, male pupae, female pupae, and unconsumed pollen-nectar provision masses in these nests. Results showed that using paper liners in nest-tunnels greatly reduced the invasion of natural enemies of managed populations of O. cornifrons. Most notably, the addition of paper liners provided protection from invasion by C. krombeini mites, as the mean number of nest cells with mites were significantly lower in these lined nests compared to the nests without paper liners. A significantly higher number of male and female cocoons of O. cornifrons were recorded in the nests with paper liners. The population of M. obscurus was almost negligible in this field study. These results suggest that using nests with paper liners may accelerate the O. cornifrons population establishment and propagation in commercial orchards of rosaceous fruit crops, and possibly in other crops.

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Observations on the life cycle ofChaetodactylus osmiae(Dufour, 1839) (Acari: Chaetodactylidae) parasitic on the solitary bee,Osmia rufa(L.), 1758 (Insecta: Hymenoptera) in Belgium

Cited by 5 publications

References 1 publication

Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees

Gonads and gametogenesis in Chaetodactylus osmiae (Acariformes: Astigmata: Chaetodactylidae) a parasite of solitary bees

Nesting Efectiveness of Red Mason Bee Osmia rufa (L.) in Reed Stalk Phragmites australis (Cav.)

Nest Modification Protects Immature Stages of the Japanese Orchard Bee (Osmia cornifrons) from Invasion of a Cleptoparasitic Mite Pest

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