Abstract
The study was conducted in the natural forest area in Terzioğlu campus of Çanakkale Onsekiz Mart University in 2018. The purpose of the study was to determine the natural effectiveness of the egg parasitoids of Thaumetopoea pityocampa (Den & Schiff.) on red pines. Eggs collected in September and October were transferred into glass tubes, then they were placed in a climate chamber with 24±1Cº temperature and 60-70% r.h. Eggs were checked daily and emerged adults were transferred to new glass tubes to examine adult longevity. Total number of egg batches was 72 with a mean number of 250.27 eggs on each batch, and parasitism rate of eggs was 18.16% (1.13%-97.32%) from a total of 18018 eggs. Ratio of the species were 26% Anastatus bifasciatus Geoffroy, 32% Baryscapus servadeii Geoffroy and 42% Ooencrytus pityocampae Mercet. In 24±1Cº tempreature and 60-70% r.h., adult longevities of O. pityocampae, B. servadeii and A. bifasciatus were determined as 18.77, 8.46 and 8.85 days, respectively.
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