Observations on some Parasites ofOscinella fritLinn
- 1 January 1930
- journal article
- research article
- Published by Cambridge University Press (CUP) in Parasitology
- Vol. 22 (1), 11-36
- https://doi.org/10.1017/s0031182000010933
Abstract
The stem infestation of Oscinella frit in England is attacked by at least two species of hymenopterous parasites of considerable importance. The species are Halticoptera fuscicornis Walk. (Chalcidoidea) and Rhoptromeris eucera Htg. (Cynipoidea). It is also parasitised to a much lesser degree by Loxotropa tritoma Thoms. (Proctotrypoidea). These three species are described and figured in detail.The three species named above have been reared by the writer from host puparia obtained in the Harpenden district; they have also been reared in the Leeds and Oxford districts by other observers. They attack the host in the larval stage of the latter and emerge from the puparia. All three species are characteristic parasites of cyclorrhaphous Diptera.In the Harpenden district a parasitism of 27 per cent. was observed in 1926 and of 37 per cent. in 1927, Rhoptromeris eucera being the dominant parasite.Evidence is brought forward which appears to indicate that the parasites, collectively, become more abundant as the season advances, with the result that Oscinella frit affecting late sown oats suffers markedly heavier parasitisation than when it attacks oats drilled earlier in the season.The time of maximum emergence of Oscinella frit in out-of-door rearing cages during the years 1926 and 1927 coincided very closely with its period of greatest abundance in the field, as recorded by Cunliffe.Keywords
This publication has 9 references indexed in Scilit:
- Die parasitischen Hymenopteren der Fritfliege (Oscinosoma frit L.)Zeitschrift für Angewandte Entomologie, 2009
- Studies On Osginella Frit Linn. A Report On Certain Oat Varieties In Relation To Their Resistance To Attack By The Frit Fly In Sweden, Together With Data Concerning The Production Of Resistant Utility VarietiesAnnals of Applied Biology, 1929
- PRELIMINARY OBSERVATIONS ON THE HABITS OF OSCINELLA FRIT, LINN.1Annals of Applied Biology, 1921
- A SHORT SUMMARY OF OUR KNOWLEDGE OF THE FRIT‐FLYAnnals of Applied Biology, 1918
- Verzeichnis der an der K. k. Pflanzenschutz‐Station in Wien erzogenen parasitischen HymenopterenZeitschrift für Angewandte Entomologie, 1915
- Classification Of The Chalcid Flies Or The Superfamily Chalcidoidea, With Descriptions Of New Species In The Carnegie Museum, Collected In South America By Herbert H. Smith.1904
- Monograph of the ChalcidoideaMemoirs of the Carnegie Museum., 1904
- Studies On The North American Chalcididae, With Descriptions Of New Species, Chiefly From Florida.1887
- Studies on the North American Chalcididæ, with Descriptions of New Species, Chiefly from FloridaTransactions of the American Entomological Society and Proceedings of the Entomological Section of the Academy of Natural Sciences, 1887