MustafA YAMAN, Ömer ERTÜRK, Salih UZUNER, Beyza Gonca GÜNER, Ömür AYAR, Mahmut EROĞLU

Distribution of microsporidial infection in the predator beetle, Calosoma sycophanta (Coleoptera:Carabidae)-rearing laboratories in Turkey

The present study aimed to determine the rate of microsporidiosis in larvae and adult beetles in Calosoma sycophanta L.(Coleoptera: Carabidae) mass-rearing laboratories. Eighty larvae and 7420 adults of C. sycophanta were dissected from the mass-rearinglaboratories and investigated for the presence of microsporidiosis. Microsporidiosis was determined in all localities. Four hundred andforty-one adults of the dissected insects were found to be infected and the total infection rate was 5.94%. A total of 80 C. sycophantalarvae from Balıkesir and Isparta examined in 2016 showed no microsporidiosis. The infection ratio was varied among populationsand years. The total infection rate per year was 2% in 2015, 3.85% in 2016, 5.7% in 2017, and 12.3% in 2018. It was observed thatmicrosporidiosis increases year after year. In addition, infection rates reached considerable levels, such as 26.3% in İzmir, 31.1% inAntalya, 30.2% in Balıkesir, and 35.2% in Mersin localities. During the study, microsporidiosis in male and female beetles was alsoinvestigated. Twenty-four (2.49%) of 963 male and 41 (2.99%) of 1370 female beetles were found to be infected. These results confirmthat the microsporidian pathogen has a high dispersal potential through the C. sycophanta mass-rearing laboratories and can be anundesirable suppressing factor in adult beetles.

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