Taley, Y.M. and Garg, D.O. and Borle, M.N. (1978) Life history of Tetrastichus sp. (Hymenoptera: Eulophidae), a parasite of the sorghum midge, Contarinia sorghicola Coquillet. Journal of the Maharashtra Agricultural Universities, 3 (3). pp. 189-193.
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Abstract
Laboratory studies were carried out in Nagpur, Maharashtra, India, in 1975-76 on the life-history of Tetrastichus sp., a parasite of larvae and pupae of the sorghum pest Contarinia sorghicola (Coq.). Females laid from 46 to 54 eggs. The egg stage lasted 2-4 days, the 4 larval instars 1-2, 2-3, 2-3 and 2-4 days, respectively, the pupal stage 10-12 days and the life-span of adult males and females 2-3 and 4-5 days. Larvae required an average of 2-3 host larvae for completion of their development. First-instar parasite larvae depended on hosts for their development, whereas those in subsequent instars were able to feed on the ovaries of sorghum spikelets when hosts were not available; this resulted in the ovaries turning brown and subsequently breaking up. The ratio of males to females was 1:1.7 in December and 1:3 in January-February. Brief descriptions of the life stages of the eulophid are given
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Zoology and Entomology, Punjabrao Krishi Vidyapeeth, Akola-444104, Maharashtra, India |
| Subjects: | Crop Improvement > Genetics/Genomics |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 26 Mar 2012 05:42 |
| Last Modified: | 26 Mar 2012 05:42 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/4144 |
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