Effect of insecticide application and host plant resistance on parasitization of sorghum midge, Contarinia sorghicola coq.

Sharma, H C (1994) Effect of insecticide application and host plant resistance on parasitization of sorghum midge, Contarinia sorghicola coq. Biocontrol Science and Technology, 4 (1). pp. 53-60. ISSN 0958-3157

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Abstract

Sorghum midge (Contarinia sorghicola Coq.) (Diptera: Cecidomyiidae) is one of the most important pests of grain sorghum. The effects of different insecticides applied at the complete‐an‐thesis stage for insect control, and host plant resistance on the parasitization of sorghum midge, were studied. Tetrastichus spp. and Eupelmus popa are the major parasites of sorghum midge larvae. Of the several insecticides tested, monocrotophos reduced midge parasitization by half compared with the untreated control. Midge parasitization was lower on midge‐resistant genotypes. Amongst the lines resistant to sorghum midge, the levels of parasitization were higher on the moderately resistant lines IS 10132 and PM 9760 compared to those on IS 3461, IS 7005, IS 9807, IS 19512 and AF 28, etc. Parasite activity closely followed the midge population density across sowing dates. The role of these factors on the effectiveness of midge parasites in integrated pest management are discussed.

Item Type: Article
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Uncontrolled Keywords: insecticides, Contarinia sorghicola, parasites, host plant resistance
Subjects: Mandate crops > Sorghum
Depositing User: Mr Charan Sai Ch
Date Deposited: 25 Oct 2011 04:54
Last Modified: 25 Oct 2011 04:54
URI: http://oar.icrisat.org/id/eprint/3172
Official URL: http://dx.doi.org/10.1080/09583159409355312
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: I would like to thank Mr V. V. Rao and Mr D. Krishna for their help in field studies and Dr K. F. Nwanze and Dr D. E. Byth for their comments on the manuscript. Approved as J.A. No. 1503 by the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT).
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