Some observations on the adult emergence of sunn pest's egg parasitoids Trissolcus semistriatus nees (hymenoptera: scelionidae) and telenomus turesis walker (Hymenoptera: platygastridae) in the same egg packs

Eurygaster integriceps Puton is the most important pest of wheat. This pest has many natural enemies that keep its population in balance in nature. The most important of these are egg parasitoids that are successfully used in biological control. Many factors are effective in the success of biological control. One of these factors is the behavior of natural enemies when they are together. In this study, the egg parasitoid of the sunn pest, Trissolcus semistriatus Nees and Telenomus turesis Walker were examined for their adult emergence when they were together. The experiments were carried out in an incubator with 26±1°C temperature, 60±10% humidity, 16:8 hour photoperiod conditions. In the first part of the experiment, different range of eggs (28-56 and 112) were given to a female of each species and the emergence of adults was observed. In the second part, the species were given on 112 eggs at the rate of 1 in 3 and the adult emergence was determined. According to results, when 28-56 and 112 sunn pest eggs were given to one T. semistriatus and one T. turesis female, T. semistriatus (57.14±3.78; 44.55±11.03; 20.94±2.02 respectively) was the species with the highest adult emergence in total. In the experiments in which the adult emergence of three T. semistriatus and one T. turesis females were investigated on 112 sunn pest eggs; T. semistriatus had the highest adult emergence rate with an average of 72.40%, and T. turesis had the highest adult emergence rate with 55.65% in the experiments where three units of T. turesis and one unit of T. semistriatus emergence were determined. When all experiments were evaluated, it was concluded that T. semistriatus was more successful than T. turesis in terms of adult emergence. Keywords: Eurygaster integriceps, Trissolcus semistriatus, Telenomus turesis, Adult emergence