Host preference and switching of two populations of Trissolcus vassilievi between two host populations | ||
| مهار زیستی در گیاهپزشکی | ||
| Article 3, Volume 5, Issue 2 - Serial Number 10, December 2018, Pages 27-42 PDF (301.75 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/bcpp.2018.117886 | ||
| Authors | ||
| Parisa Benamolaei1; Shahzad Iranipour2; Shahryar Asgari3 | ||
| 1Department of Animal Biology, Faculty of Natural Science, University of Tabriz, Tabriz, Iran | ||
| 2Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, Iran | ||
| 3Plant Protection Research Department, Tehran Agricultural and Natural Resources Research and Education Center, AREEO, Varamin, Iran | ||
| Abstract | ||
| Host selection by parasitoids has vital effects on their fitness. Trissolcus vassilievi (Hym., Platygastridae) is a species with high biological potential in sunn pest control. Those parasitoids that develop in higher quality hosts are more vital and fecund than those develop in lower quality hosts. In this study, host preference and switching behavior of two populations of T. vassilievi (Tabriz and Varamin) was investigated on the same populations of the host at ratios of 5:1, 4:2, 3:3, 2:4 and 1:5 clutches. Host measurements revealed that host eggs was significantly heavier in the Varamin bugs than the Tabriz ones. The Varamin wasps were also larger than the Tabriz wasps and the progeny of the crosses was closer to the maternal populations. Data analysis was done by Murdoch (1969) and Cock (1978) methods. Referring to the values of c1 (preference index for Tabriz sunn pest) and c2 (preference index for Varamin sunn pest), Varamin population of T. vassilievi presented negative tendency to Tabriz host and positive tendency although non-significant to Varamin host. Linear regression analysis also showed significant trend of the parameter "c" over the host ratio in both parasitoids which confirms presence of switching behavior. In general, we can say that difference between host populations is less considerable than what can affect host-preference by the wasp. | ||
| Keywords | ||
| sunn pest; preference index; switching behavior; egg size; wasp size | ||
| References | ||
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