caa a22 4500 388035730 CHVBK 20180307125003.0 cr unu---uuuuu 161130e199802 xx s 000 0 eng 10.1017/S0007485300041596 doi S0007485300041596 pii (NATIONALLICENCE)cambridge-10.1017/S0007485300041596 The effect of leguminous plant species on Callosobruchus maculatus (Coleoptera: Bruchidae) and its egg parasitoid Uscana lariophaga (Hymenoptera: Trichogrammatidae) [Elektronische Daten] The performance of the egg parasitoid Uscana lariophaga Steffan was studied when reared on eggs of the bruchid storage pest, Callosobruchus maculatus (Fabricius) developing in seeds of cowpea, chickpea and pigeonpea. The beetle laid more and larger eggs on pigeonpea than on cowpea and chickpea, indicating that there was not a trade-off between number and size of the eggs. The bruchid larvae reared on pigeonpea exhibited a longer development time and a higher mortality than those reared on cowpea and chickpea. The resulting males weighed less than those reared on cowpea and chickpea. The trichogrammatid U. lariophaga parasitized more eggs when C. maculatus was reared on chickpea than when reared on the other hosts. Parasitoid larvae developed slowest and had the highest mortality in eggs of C. maculatus reared on pigeonpea compared to those reared on cowpea and chickpea; the sex ratio (% of females) of the resulting adults was also higher. The high mortality and long development time of C. maculatus reared on pigeonpea indicated that this legume was less favourable to C. maculatus than chickpea or cowpea. This was probably also true for the parasitoid since the mortality was higher and development longer in eggs of C. maculatus reared on pigeonpea compared to those reared on cowpea and chickpea. Therefore, when host eggs were larger and of lower nutritional quality, the proportion of female egg parasitoids was greater. Copyright © Cambridge University Press 1998 van Huis A. Department of Entomology, Wageningen Agricultural University, PO Box 8031, 6700 EH Wageningen, The Netherlands de Rooy M. Department of Entomology, Wageningen Agricultural University, PO Box 8031, 6700 EH Wageningen, The Netherlands Bulletin of Entomological Research Cambridge University Press 88/1(1998-02), 93-99 0007-4853 88:1<93 1998 88 BER https://doi.org/10.1017/S0007485300041596 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0007485300041596 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- van Huis A. Department of Entomology, Wageningen Agricultural University, PO Box 8031, 6700 EH Wageningen, The Netherlands NATIONALLICENCE 700 1- de Rooy M. Department of Entomology, Wageningen Agricultural University, PO Box 8031, 6700 EH Wageningen, The Netherlands NATIONALLICENCE 773 0- Bulletin of Entomological Research Cambridge University Press 88/1(1998-02), 93-99 0007-4853 88:1<93 1998 88 BER CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge