Tarbiat Modares University Journal of Crop Protection 2251-9041 14 3 2025 10 01 Does superparasitism affect fitness of Ooencyrtus telenomicida, an egg parasitoid of Eurygaster integriceps? 327 343 27820 10.48311/jcp.2025.76220.0 EN Ashkan Rafat Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, Iran. Seyed Ali Safavi Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, Iran. Shahzad Iranipour Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, 51666-14888, ‎Iran.‎ Journal Article 2024 10 30 <em><span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'B Lotus';">Ooencyrtus telenomicida</span></em><span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'B Lotus';"> Vassiliev (Hym.: Encyrtidae) is an important and broadly distributed egg parasitoid of sunn pest <em>Eurygaster integriceps</em> Puton (Hem.: Scutelleridae) in Iran. Few studies have been carried out on this species. In this research, the life history of <em>O. telenomicida</em>, was studied on <em>E. integriceps</em> eggs under laboratory conditions. All parameters were compared between two levels of parasitism, i.e., superparasitized (SP = two progenies per host egg) and non-superparasitized (NSP = one progeny per host egg). The developmental time of the whole immature stages within the host eggs was 13-17 days. The longevity of adult males and females also ranged between 25-35 and 23-41 days, respectively. The number of eggs was recorded to be 43-191 per female. Moreover, the mean number of daily per capita eggs was 5.3-19.12 per female. The pre-adult survival rate of the two cohorts was 100%, i.e., all wasps from the two cohorts hatched successfully from the host eggs. Superparasitism was observed in all female wasps. Observed sex ratio of the emerged broods was 0.437-0.898 females/total offspring. The intrinsic rate of increase (<em>r</em>) of NSP and SP wasps was estimated 0.224 ± 0.004 and 0.234 ± 0.004 per day, respectively. Net reproductive rate was 76.13 ± 7.55 and 81.6 ± 9.66 females/female/generation for the same cohorts, respectively. The mean generation time was also estimated to be 19.36 ± 0.41 and 18.84 ± 0.40 days for the same treatments, respectively. No significant difference was observed in life table parameters of the two parasitoid cohorts. Therefore, our results showed that superparasitism had no negative effects on the reproductive fitness of <em>O. telenomicida</em>.</span><br><span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'B Lotus';"> </span> https://jcp.modares.ac.ir/article_27820_c4d45d45e1a473a3e43c8699766169ee.pdf