Diversity of predatory coccinellids in rice field agroecosystem in Kampar Regency, Riau, Indonesia

Abstract Predatory coccinellids is usefull organism in pest controlling in rice field agroecosystem. The research aimed to study the diversity, richness, evenness and dominance of predatory coccinellids in rice field agroecosystem in Kampar regency, Riau. The research was conducted in rice field of Kampar regency and Laboratory of Pest, Faculty of Agriculture, Riau University, Pekanbaru, Riau, Indonesia from June to August 2024. Survey method was used in the study and locations were determined by purposive sampling method. Three districts were chosen for sampling locations, Bangkinang, Kampa and Kampar. In each district, three rice fields were determined for coccinellids collection. Predatory coccinellids were collected by using sweep net and hand picking. The data were analysed by using Shannon-Wienner index. The result showed that five predatory coccinellids were found, Coccinella transversalis , Harmonia octomaculata , Menochilus sexmaculatus , Verania discolor and Verania lineata . Diversity index of predatory coccinellids at low level (0.85), richness index at low level (0.66), evenness index at moderate level (0.53) and dominance index at low level (0.47). The conservation of these predatory coccinellids in rice field agroecosistem in Kampar regency should be done to supress brown planthopper population.