Abdurrahman AYVAZ, Salih KARABÖRKLÜ, Aydın Ş. TUNÇBİLEK

YUMURTA PARAZİTOİDİ Trichogramma evanescens (HYMENOPTERA: TRICHOGRAMMATIDAE)’ İN YAŞAM EVRELERİNİN GAMMA RADYASYONUNA KARŞI DUYARLILIKLARI

Bu çalışmada, gamma radyasyonunun yumurta parazitoidi Trichogramma evanescens’in yumurta, pupa ve ergin evreleri üzerine etkileri araştırılmıştır. Parazitoidin yumurta evresi 0-20 Gy arasında değişen dozlarda ışınlandığında artan doza bağlı olarak pupalaşma, ergin çıkışı ve dişi birey oranında azalma gözlenmiştir. 5 Gy’lik dozla ışınlanan yumurtalardan gelişen erginlerin parazitleme oranlarında kontrole göre önemli bir azalma görülmemiştir. Parazitoidin 1 günlük pupaları ışınlandığında ergin çıkışı, parazitleme oranı ve F1 ergin çıkışı bakımından 10 Gy’e kadar önemli bir azalma görülmemiştir. Parazitoidin 6 günlük pupaları ışınlandığında ise uygulanan tüm dozlarda benzer oranlarda ergin çıkışı gözlenmişken parazitleme oranı artan doza bağlı olarak azalmıştır. Birinci nesil parazitlemesi ise tüm dozlarda benzer oranda gerçekleşmiştir. Parazitoid erginleri 0-80 Gy arasındaki dozlarda ışınlandığında ergin çıkışı, parazitleme ve F1 ergin çıkışı artan doza bağlı olarak azalmıştır. Düşük doz uygulanan erginler 4 Gy’lik dozda diğer uygulamalara göre daha az yaşamıştır.

Anahtar Kelimeler:

T. evanescens, Gamma radyasyonu, Parazitoid, Parazitleme

GAMMA RADIATION SENSITIVITY OF THE LIFE STAGES OF THE EGG PARASITOID Trichogramma evanescens (HYMENOPTERA: TRICHOGRAMMATIDAE)

In this study the the effects of gamma radiation on eggs, pupae and adult stages of the egg parasitoid Trichogramma evanescens were investigated. When the eggs were irradiated with the doses between 0-20 Gy, pupation, parasitization and percentage of female decreased depending on the increasing doses. The parasitization of the adults developed from irradiated eggs at 5 Gy was not changed when compared control. The 1-day old pupae of the parasitoid was not affected by gamma radiation with respect to adult emergence, parasitization rate and F1 emergence up to 10 Gy. While adult emergence from irradiated 6-day old pupae was not affected up to the 20 Gy dose parasitization performances of these adults decreased depending on the increasing doses. The F1 generation developed from irradiated 6-day old pupae showed similar parasitization performance when compared with control at all doses. When the adult parasitoids irradiated with the doses between 0-80 Gy parasitization, adult emergence and parasitization performance of the F1 adults decreased with increasing doses. Gamma radiation caused reduction in the longevity even at the low doses.

Keywords:

T. evanescens, Gamma radiation, Parasitoid, Parasitization,

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