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Calosoma sycophanta L. (Coleoptera: Carabidae) is a voracious predatory beetle that feeds on several important lepidopteran pests. It is mass reared in laboratory breeding and released against forest pests. Any infection in this beetle is undesirable because it impacts production of effective and healthy beetles. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2016) 40: 420-424 © TÜBİTAK doi:10.3906/tar-1507-42 http://journals.tubitak.gov.tr/agriculture/ Research Article Occurrence of a microsporidium in the predatory beetle Calosoma sycophanta L. (Coleoptera: Carabidae) 1, 2 3 Mustafa YAMAN *, Mahmut EROĞLU , Renate RADEK Department of Biology, Faculty of Sciences, Karadeniz Technical University, Trabzon, Turkey 2 Department of Forest Engineering, Faculty of Forestry, Karadeniz Technical University, Trabzon, Turkey 3 Institute of Biology/Zoology, Free University of Berlin, Working Group Evolutionary Biology, Berlin, Germany 1 Received: 08.07.2015 Accepted/Published Online: 05.02.2016 Final Version: 18.05.2016 Abstract. Calosoma sycophanta L. (Coleoptera: Carabidae) is a voracious predatory beetle that feeds on several important lepidopteran pests. It is mass reared in laboratory breeding and released against forest pests. Any infection in this beetle is undesirable because it impacts production of effective and healthy beetles. In the present study, a microsporidian pathogen was found in C. sycophanta. Mature spores of the pathogen are single, uninucleate, oval, and small, measuring about 3.04 × 1.7 µm. The spore wall is 100 to 110 nm thick and consists of two layers: an electron-dense outer layer, the exospore (30–35 nm), and an electron-lucent inner layer (the endospore; 70–80 nm). The polaroplast is of the lamellated type with thin lamellae anteriorly and thick lamellae posteriorly. A polar sac with an anchoring disc of the polar filament is clearly seen anteriorly. The polar filament is isofilar and has 8 coils, each 70 to 95 nm in diameter. The microsporidium presented here is the first pathogen recorded from this beetle and is tentatively classified as Microsporidium sp. Key words: Microsporidia, forest caterpillar hunter, Calosoma sycophanta, disease 1. Introduction Calosoma sycophanta L. (Coleoptera: Carabidae) is a voracious predatory .
