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Progress in the Biological Testing of Sorghum Midge (Contarinia spp.)

Published online by Cambridge University Press:  10 July 2009

H. F. Barnes
H. F. Barnes
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
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Extract

Successful emergence of examples of Contarinia sp. and associated parasites has been obtained at Rothamsted Experimental Station from midge-infested heads of sorghum received from India (Mysore State) and West Africa (Ghana).

Since typical pre-mating behaviour was observed on all of the few occasions when newly emerged males and females from the two continents were confined together, and actual mating was obtained between a male from Ghana and two females from Mysore in rapid succession, it is concluded that inter-mating will take place under suitable environmental conditions, although in the present series of experiments such conditions were rarely present.

It has not yet been possible to test the fertility of such inter-matings or to prove biologically that the species of Contarinia concerned is the C. sorghicola (Coq.) of Texas, although on morphological grounds there are apparently no reasons for their separation.

Two species of parasites, a Tetrastichus sp. (group of flavovarius, auct.) and Eupelmus popa Gir., were reared from the Indian material, and another species of Tetrastichus (group of flavovarius, auct.) and E. popa were reared from the West African material.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 49 , Issue 3 , September 1958 , pp. 555 - 558
Copyright
Copyright © Cambridge University Press 1958

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References

Barnes, H. F. (1954 a). The Sorghum Midge problem.—Rep. 6th Commonw. ent. Conf. 1954, pp. 101–104.Google Scholar
Barnes, H. F. (1954 b). Memorandum on the gall midges living on the sorghums, the Panicum millets and rice.—Rep. 6th Commonw. ent. Conf. 1954, pp. 155–160.Google Scholar
Barnes, H. F. (1956). Gall midges of economic importance. Vol. III. Gall midges of cereal crops.—261 pp. London, Crosby Lockwood.Google Scholar
Geering, Q. A. (1953). The Sorghum Midge, Contarinia sorghicola (Coq.), in East Africa.—Bull. ent. Res., 44, pp. 363–366.CrossRefGoogle Scholar