Heinz, K.M. and Parrella , M.P. (1990) The influence of host size on sex ratios in the parasitoid Diglyphus begini (Hymenoptera: Eulophidae). Ecological Entomology, 15 (4). pp. 391-399.
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Abstract
Sex allocation in Diglyphus begini, a parasitoid of Liriomyza trifolii, was studied in 2 greenhouses containing African marigolds (Tagetes erecta) in California during 1986 and 1987. The sex ratio was best depicted by a model where sex ratio varied as a function of host size. Male parasitoid progeny were produced in relatively smaller hosts than female progeny. Adult females attacked and oviposited in the largest larvae available and adjusted the threshold size for the changeover in sex allocation relative to the size of hosts attacked. The sex ratio was maintained at 60-70% males. The patterns observed were not due to sex-specific differential mortality or superparasitism
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Entomology, University of California, Davis, CA 95616, USA |
| Subjects: | Plant Production |
| Divisions: | Other Crops |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 11 Nov 2011 04:55 |
| Last Modified: | 11 Nov 2011 05:00 |
| Official URL: | http://dx.doi.org/10.1111/j.1365-2311.1990.tb00822... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/2758 |
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