Determining some overwintering features of sunn pest (Eurygaster integriceps put.) (Heteroptera:Scutelleridae) and investigating the using possibilities of wintering sunn pest adults in mass rearing of sunn pest egg parasitoids Trissolcus spp. (Hymenoptera:Scelionidae)

In this study; it was determined that 20 °C temperature, 35%-40% humidity in the summering period, 4-5 °C temperature, 70%-75% humidity in the wintering period are necessary for Sunn pest (Eurygaster integriceps Put.). It was determined that in artificially wintered Sunn pest adults, the highest rate of alive individual was obtained from the individuals wintered at 6 and 9 °C temperature, the highest egg efficiency was obtained from the individuals cultured in February at 6 °C temperature. While the highest alive body weights and body fat rates were determined in June, the lowest of these were determined in October. It was determined that as the duration of egg storing getting longer, parasitizing rates and parasitoid exiting rates decreased, however getting dark period of the egg and sex rates didn?t change. While rearing efficiencies of Trissolcus semistriatus (Nees) obtained from the fresh eggs were determined to be 47.61% in 2007 and 42% in 2008, those obtained from the stored eggs were determined to be 31.25% in 2007 and 26.6% in 2008. For Trissolcus festiva (Victorov), while rearing efficiencies of individuals from the fresh eggs were determined to be 45% in 2007 and 38% in 2008, those obtained from the stored eggs were determined to be 24.42% in 2007 and 15% in 2008. It was determined that prime preferences of T. semistriatus and T. festiva obtained from different hosts in nature was Sunn pest and it was followed by Dolycoris baccarum (L.), Aelia rostrata (Boh.) and Eurydema ornatum (L.) eggs.