In this study we evaluated the dispersal ability of Trichogramma evanescens in field and storage conditions. In field studies we tested the effects of plant structure on the dispersal ability of T. evanescens from release points. Both in a corn field and on grapevines the level of parasitism was negatively correlated with distance when the host eggs were located away from the release point. | Turk J Biol 32 (2008) 127-133 © TÜB‹TAK Dispersal Ability and Parasitization Performance of Egg Parasitoid Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae) in Field and Storage Conditions 1 2 2 2 Abdurrahman AYVAZ , Eyüp KARASU , Salih KARABÖRKLÜ , Semih YILMAZ 1 Department of Biology, Faculty of Arts and Sciences, Erciyes University, 38039 Kayseri - TURKEY 2 Graduate School of Natural and Applied Sciences, Erciyes University, Kayseri - TURKEY Received: Abstract: In this study we evaluated the dispersal ability of Trichogramma evanescens in field and storage conditions. In field studies we tested the effects of plant structure on the dispersal ability of T. evanescens from release points. Both in a corn field and on grapevines the level of parasitism was negatively correlated with distance when the host eggs were located away from the release point. The parasitization rate on grapevines and corn plants at the release point was greater than that away from the release point. Parasitization rates were significantly higher at the highest wasp density in cages. When 1000 wasps were released, the percentage of parasitized host eggs was , and this rate increased to and when 2000 and 3000 wasps, respectively, were released. A similar trend was observed in plastic bags and increasing parasitoids caused a reduction in adult pest emergence. Key Words: Trichogramma evanescens, release, parasitization, dispersal ability Arazi ve Depo Koflullar›nda Yumurta Parazitoidi Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae)'in Etrafa Da¤›lma ve Parazitleme Yetene¤inin Araflt›r›lmas› Özet: Bu çal›flmada yumurta parazitoidi Trichogramma evanescens’in sal›verilme noktas›ndan farkl› uzakl›klardaki parazitleme yetene¤i araflt›r›lm›flt›r. M›s›r ve asma bitkilerinin her ikisinde de sal›verme noktas›ndan uzaklaflt›kça parazitleme miktar›n›n azald›¤› görülmüfltür. Depo koflullar›nda en yüksek parazitleme oran› sal›verme .
