Abstract
Ozet Laboratuvar sartlarinda Galleria mellonella (Lepidoptera: Pyralidae) puplarinda yetistirilen endoparazitoid Pimpla turionellae (Hymenoptera: Ichneumonidae)'nin larval evresine, konak icinde iken uygulanan tedrici azalan sicakligin etkileri arastirildi. Parazitlenen konak puplari sirasiyla 25, 20, 15 ve 10°C'de 3'er gun ve takiben dort farkli deney grubunda 4°C'de 2, 3, 4 ve 5 gun bekletildi. Uygulamalar sonucunda cikan bireylerin erginlesme sureleri, cinsiyetleri ve agirliklari tespit edildi. Disi ve erkek bireylerde ergin cikis suresinin kontrol grubuna gore uzadigi ve bu surenin ozellikle dusuk sicaklikta 5 gun bekletilen deney grubundan cikan bireylerde yaklasik %50 oraninda arttigi gozlendi. Ergin cikis yuzdesi dusuk sicaklikta (4°C) bekletme suresinin artmasiyla beraber azaldi. Kontrol grubunda erginlesen disi ve erkek bireylerin yuzdeleri hemen hemen esitken, dusuk sicaklik uygulama suresinin artisiyla beraber erginlesen bireylerde disi yuzdesinin erkek bireylerin yuzdesine gore daha yuksek oldugu tespit edildi. 4°C'de bekletme suresinin uzamasi ile disi bireylerin agirliginda azalma meydana gelirken erkek bireylerin agirliginda fark bulunmadi. Bununla beraber dusuk sicaklik uygulamasi sonrasinda cikan bireylerin agirligi ile kontrol grubundan cikan bireylerin agirliklari arasinda istatistiksel bir fark tespit edilmedi. Anahtar Kelimeler: Ergin agirligi, ergin cikis orani, ergin oncesi gelisim, hymenoptera, Pimpla turionellae, tedrici azalan sicaklik. Abstract The effects of gradually decreased temperature on pre-adult development of endoparasitoid Pimpla turionellae (Hymenoptera: Ichneumonidae) reared on Galleria mellonella (Lepidoptera: Pyralidae) pupae at laboratory conditions were investigated. Parasitized host pupae were acclimated at a gradually decreased temperature; for 3 days at each 25, 20, 15 and 10°C, and then kept in separate four groups for 2, 3, 4 and 5 days at 4°C. Pre- adult development time, adult emergence, sex ratio and weight of wasps were determined for each treatment. Adult emergence of treatment groups lasted longer than controls for both sex and that time was observed to increase approximately 50% in the adult from experimental group which was kept for 5 days at 4°C. Adult emergence ratio also decreased by increasing acclimation time at 4°C. While ratio of adult emergence of female was equal with that of male in the control group, that of female was found to be more than that of adult male by increasing acclimation time at 4°C. The weight of females decreased while there was no difference in that of males. However, the data showed that any difference wasn't statically determined between the weigh of the control and experimental groups.
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