Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-23T22:05:23.361Z Has data issue: false hasContentIssue false
  • English
  • Français

The Chondrilla gall midge, Cystiphora schmidti (Rübsaamen) (Diptera, Cecidomyiidae). II. biology and host specificity

Published online by Cambridge University Press:  10 July 2009

L. A. Caresche  and
A. J. Wapshere
L. A. Caresche
Affiliation:
CSIRO Biological Control Unit, 335 Avenue Abbé Paul Parguel, 34000—Montpellier, France
A. J. Wapshere
Affiliation:
CSIRO Biological Control Unit, 335 Avenue Abbé Paul Parguel, 34000—Montpellier, France
Get access Rights & Permissions [Opens in a new window]

Abstract

A Cecidomyiid gall midge, Cystiphora schmidti (Rübsaamen), lives on several related Chondrilla spp. occurring from Greece and eastern Europe to Iran. Its biology and host specificity were studied in the eastern Mediterranean region as part of the biological control programme against the weed C. juncea (Compositae, Cichoriaceae) in Australia. The adult female oviposits into the lower epidermis of the plant where small circular to ovoid raised galls are produced on the rosette, stem leaves and the stem. All the immature stages are completed inside the gall in 24–44 days, allowing 6–7 generations per year in southern Greece before low temperatures prevent development of overwintering larvae. The midge is heavily parasitised in Greece by two species of Eulophidae. Particularly in southern Greece, dense gall populations cover the leaves and stems of C. juncea, causing death of leaves, stunting and less seeding. Tests against 76 species of plants including some Cichoriaceae closely related to Chondrilla showed that Cystiphora schmidti is specific to the genus Chondrilla. Comparative tests with Cystiphora schmidti from Greece against four forms of Chondrilla juncea showed that the midge was adapted to its usual Greek host but was less closely adapted to a western Mediterranean form. The Greek strain of the midge readily attacked and thrived on the main Australian form of C. juncea.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 65 , Issue 1 , March 1975 , pp. 55 - 64
Copyright
Copyright © Cambridge University Press 1975

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Buhr, H. (1964–1965). Bestimmungstabellen der Gallen (Zoo- und Phytocecidien) der Pflanzen Mittel- und Nord Europas, Band. I, II.—1572 pp. Jena, VEB Gustav Fischer Verlag.Google Scholar
Caresche, L. A. (1973). The specificity and host specialisation of three insects and a mite living on Chondrilla juncea L. Proc. 2nd Int. Symp. Biological Control of Weeds, Rome, 1971.—127–133. Misc. Publs Commonw. Inst. Biol. Control no. 6.Google Scholar
Harris, K. M. (1975). The Chondrilla gall midge, Cystiphora schmidti (Rübsaamen) comb. n. (Diptera, Cecidomyiidae). I. Taxonomy and description.— Bull. ent. Res. 65, 51–54.CrossRefGoogle Scholar
Harris, P. & Zwölfer, H. (1968). Screening of phytophagous insects for biological control of weeds.—Can. Ent. 100, 285–303.CrossRefGoogle Scholar
Mani, M. S. (1964). Ecology of plant galls.—434 pp. The Hague, W. Junk.CrossRefGoogle Scholar
Meyer, J. (1954). Sur l'accumulation et l'origine de lipides dans certains tissus nourriciers de galles.—C.r. hebd. Séanc. Acad. Sci., Paris 238, 1066–1069.Google Scholar
Nijveldt, W. (1969). Gall midges of economic importance. Vol. VIII: Miscellaneous.—221 pp. London, Crosby Lockwood.Google Scholar
Rübsaamen, E. H. (1914). Cecidomyiden Studien III.—Marcellia 13, 88–114.Google Scholar
Rübsaamen, E. H. & Hedicke, H. (1925–1939). Die Cecidomyiden (Gallmücken) und ihre Cecidien.—Zoologica, Stuttg. 29, 1–350.Google Scholar
Wapshere, A. J. (1973 a). Recent work on the assessment of the biological control potential of the Chondrilla juncea organisms. Proc. 2nd Int. Symp. Biological Control of Weeds, Rome, 1971.—95–102. Misc. Publs Commonw. Inst. Biol. Control no. 6.Google Scholar
Wapshere, A. J. (1973 b). A comparison of strategies for screening biological control organisms for weeds. Proc. 2nd Int. Symp. Biological Control of Weeds, Rome, 1971.—151–160. Misc. Publs Commonw. Inst. Biol. Control no. 6.Google Scholar