Reproduction and survival of overwintered and ^$F_1^$generation of two egg parasitoids of sunn pest, Eurygaster integriceps put. (Heteroptera: scutelleridae)

Kışlamış (OW) ve ^$F_1^$ nesline ait Trissolcus semistriatus Nees ve T. festivae Victorov (Hymenoptera: Scelionidae)’nın üreme biyolojisi laboratuar koşullarında incelenmiştir. Faktör olarak iki türün, OW ve ^$F_1^$ neslinin ovipozisiyon süresi, yaşam süresince verdiği birey sayısı, dişi sayısı, cinsiyet oranı ve yaşam sürelerini belirlemek için denemeler kurulmuştur. Bu çalışmanın sonuçları her iki parazitoit türü için ^$F_1^$ neslinde ovipozisyon süresinin kışlamış olan dişilerinkinden daha uzun olduğunu göstermektedir. Günlük olarak en yüksek ortalama verdikleri birey sayısı, T. festivae’ın ^$F_1^$ nesli hariç, dişilerin günlük olarak ortalama verdikleri birey sayısı en yüksek birinci günde kaydedilmiştir. Dişi bireylerin yaşamları süresince verdikleri ortalama birey sayıları sırayla T. semistriatus’un kışlamış ve ^$F_1^$ nesli için 88.8 ± 6.13 ve 111.9 ± 6.66 ve T. festivae’nın kışlamış ve F1 nesli için 85.6 ± 6.83 ve 104.7 ± 4.66 birey olarak hesaplanmıştır. Cinsiyet oranı her iki tür için de belirgin olarak dişi ağırlıklı olmuştur. Türlerin, faktörler (OW ve F1 nesli) ve bunların interaksiyonlarının cinsiyet oranı üzerine önemli bir etkisi olmamıştır. Kışlamış dişilerin ortalama yaşam süreleri T. semistriatus için 16.2 ± 1.76 ve T. festivae için 16.9 ± 1.21 ve ayrıca ^$F_1^$ nesline ait ortalama yaşam süresi T. semistriatus dişileri için 17.5 ± 1.46 ve T. festivae için 28.5 ± 1.94 gün olduğu belirlenmiştir. Böylece, kitle üretimi ve biyolojik mücadele uygulamalarının başarısı için her iki türün bazı biyolojik özellikleri kışlamış popülasyonların kullanılması bakımından karşılaştırılmış ve tartışılmıştır.

Süne, Eurygaster integriceps put. (Heteroptera: scutelleridae)'in iki yumurta parazitoitinin kışlamış ve ^$F_1^$ neslinin yaşam süreleri ve üremeleri

The differences in the reproductive biology of overwintered (OW) and F1 generation of Trissolcus semistriatus Nees and T. festivae Victorov (Hymenoptera: Scelionidae) were investigated under laboratory conditions. The experiments were conducted to evaluate oviposition period, lifetime fecundity, female progeny, sex ratio, and longevity of OW and ^$F_1^$ generation with the two species as factors. The results of this study showed that the oviposition period of ^$F_1^$ generation was longer than that of OW females for both of the two parasitoid species. With the exception of ^$F_1^$ generation of T. festivae, the highest daily average progeny production of females was recorded on the first day. The mean lifetime fecundity of ovipositing females were calculated as 88.8 ± 6.13 and 111.9 ± 6.66 for OW and ^$F_1^$ generation of T. semistriatus, 85.6 ± 6.83; 104.7 ± 4.66 for OW and ^$F_1^$ generation of T. festivae, respectively. The sex ratios of progeny for both of the species were distinctly female-biased. The effects of species, factors (OW and ^$F_1^$ generation), and their interactions were significant on the sex ratio of progeny. The average longevity of OW females was 16.2 ± 1.76 days for T. semistriatus and 16.9 ± 1.21 for T. festivae. The average longevity of ^$F_1^$ generation females was 17.5 ± 1.46 days for T. semistriatus and 28.5 ± 1.94 for T. festivae. Thus, some several biological characteristics of both species were compared and discussed with regard to the use of OW populations for the successful implantation of biological control and mass production.

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