Chlorantraniliprole application differentially affects adult emergence of Sympetrum dragonflies in rice paddy fields

Rice paddy fields are important habitat for many dragonfly species. In Japan, populations of dragonflies inhabiting rice paddies, in particular Sympetrum (Odonata: Libellulidae), have decreased greatly the last few decades. A major cause decline has been suggested to be use systemic insecticides (e.g., phenylpyrazole and neonicotinoid) nursery boxes seedlings. this study, we examined effects chlorantraniliprole (CAP), a novel anthranilic diamide insecticide, on adult emergence ten by counting their exuviae remaining plants as an abundance index. Our results suggest that CAP is potential factor reduced rate S. infuscatum but not frequens. This difference may due differential sensitivity CAP, different lengths nymphal stage, or bottom-up controls via reduction prey organisms highly sensitive CAP.