caa a22 4500 397570767 CHVBK 20180308164840.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.283 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.283 Host Selection, Sex Allocation, and Host Feeding by Metaphycus helvolus (Hymenoptera: Encyrtidae) on Saissetia oleae (Homoptera: Coccidae) and Its Effect on Parasitoid Size, Sex, and Quality [Elektronische Daten] [L. J. Lampson, J. G. Morse, R. F. Luck] Black scale, Saissetia oleae (Olivier), growth ceased following parasitization by Metaphycus helvolus (Compere). With insectary-parasitized hosts, both male and female parasitoid size increased with increasing host size. Average host size in a laboratory study was larger and no clear host-parasitoid size relationship resulted. The observed secondary sex ratio from the laboratory study was 0.18 (male:total), whereas the mean secondary sex ratio of offspring from hosts parasitized in a commercial insectary was 0.48. For both laboratory and insectary-parasitized hosts, host scale size from which male offspring emerged was significantly smaller than those from which females emerged. The effect of parasitoid size on several measures of progeny reproductive fitness was examined under laboratory conditions. Larger parasitoids of both sexes had longer life spans, with male longevity more strongly affected by size than female longevity. Four-day egg complement was correlated with parasitoid size, with large females producing approximately twice as many eggs as small females. Under competitive conditions (with 2 virgin males and 1 virgin female), large male parasitoids were 3 times as likely to contact the female first as were small males, and were 5 times as successful in copulating with the female. No significant difference existed between large and small males in the number of times they failed to copulate with a virgin female. © 1996 Entomological Society of America Pest Management and Sampling nationallicence Metaphycus helvalus nationallicence Saissetia oleae nationallicence black scale nationallicence sex allocation nationallicence host size nationallicence sex ratio nationallicence Lampson L. J. Department of Entomology, University of California, Riverside, Riverside, CA 92521 aut Morse J. G. Department of Entomology, University of California, Riverside, Riverside, CA 92521 aut Luck R. F. Department of Entomology, University of California, Riverside, Riverside, CA 92521 aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 283-294 0046-225X 25:2<283 1996 25 ee https://doi.org/10.1093/ee/25.2.283 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.283 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lampson L. J. Department of Entomology, University of California, Riverside, Riverside, CA 92521 aut NATIONALLICENCE 700 1- Morse J. G. Department of Entomology, University of California, Riverside, Riverside, CA 92521 aut NATIONALLICENCE 700 1- Luck R. F. Department of Entomology, University of California, Riverside, Riverside, CA 92521 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 283-294 0046-225X 25:2<283 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford