Effects of two different hosts and two different temperatures on preadult development time, fecundity, sex ratio and adult longevity of parasitoid, Dibrachys boarmiae (Walker) (Hymenoptera: Pteromalidae)

Abstract

Effects of two different hosts and two different temperatures on preadult development time, fecundity, sex ratio and adult longevity of parasitoid, Dlbrachys boarmlae (Walker) (Hymenoptera; Pteromalidae) were investigated. Studies were carried out under 65±5 % relative humidity and conditions with continuous light, two different hosts (Galleria mellonella L. and Achorla grlsella Fabr.) and two different temperatures (25±2°C and 30±2°C). Preadult development time decrased with temperatures, male parasitoids emerged more early than female parasitoids. Host type did not effect preadult development time of parasitoid, but effected adult longevity, sex ratio and fecundity of parasitoid. Adult parasitoids obtained on G. mellonella lived longer than A. grlsella. At the same host, fecundity and sex ratio of the parasitoid did not cause any significant difference at the different temperatures. Fecundity was 16.03 at 25°C and 15,94 at 30°C and sex ratios were 71.46 % at 25°C and 72.90 % at 30°C in A. grlsella. Fecundity was 31.38 at 25°C and31.19 at 30°C and sex ratios were 80.40 % and 85.52 % respectively in G. mellonella. Adult male parasitoids lived less than female parasitoids in the foodless conditions.

Keywords

• development time
• Dlbrachys boarmlae
• fecundity
• sex ratio
• longevity

İki Farklı Konukcu ve İki Farklı Sıcaklığın Parazitoit Dibrachys Boarmiae (Walker) (Hymenoptera: Pteromalidae)'nin Ergin Öncesi Gelişme Süresi, Verim, Eşey Oranı ve Ergin Yaşam Süresine Etkileri

Öz

Bilindiql gibi biyolojik savasm basansi, kullamlacak etmenin scciminin yarunda, onun istenildigi zaman kitlesel olarak uretilebilrnesine, laboratuvarda uretilenlerin doga kosullanna uyumuna ve biyolojik savasin uygulama ybntemine baqlidir (Doutt, 1959; Gulel, 1982; Biswas, 1994; Hokkanen & Lynch, 1995; Hu & Vinson, 2000). Biyolojik sava§ etmenlerinden olan parazitoitlerin ergin bncesi qelisrne sureleri, ergin yasam suresi ve ergin parazitoit verimi pek cok faktbre baqh olarak degi§- mektedir (Gule!, 1982; GUlel, 1987; GUlel, 1988a; GUlel, 1988b; Sankaya, 1994; Morales-Ramos ve ark., 1996, Uckan & Ergin, 2002; Mehrnejad, 2003). Parazitoitlerde konukcuvu disilerin arayip bulmasmda, cevredeki fiziksel ve kimyasal fektorler onernlidir (Tumliston et al., 1993). Konukcusunun farkh ergin oncesi qelisme evrelerini parazitleyebilen, gregar ve idiobiont bir ektoparazitoit olan Dibrachys boarmiae (Walker) (Pteromalidae: Hymenoptera)'nin konukcu parazitoit iliskileri ve biyolojik savasta iyi bir materyal olabileccqi dcqisik arastmcilar tarafmdan bildirilmistir

Anahtar Kelimeler

• Dlbrachys boarmlae
• gelişme süresi
• verim
• dişi yüzdesi
• yaşam süresi