Composition, sex ratio, and population density of Silba adipata McAlpine (Diptera, Lonchaeidae) and Bactrocera dorsalis Complex (Diptera, Tephritidae) in white chili (Capsicum frutescens L.) in Bali Province, Indonesia

This study aims to determine the composition, sex ratio, and population density of the pest, Silba adipata and Bactrocera dorsalis in White Chili (Capsicum frutescens L.) in Bali. This research was conducted from March 2020 to July 2020. Samples were taken from 9 districts and cities in Bali Province, namely Jembrana, Tabanan, Buleleng, Badung, Denpasar City, Gianyar, Bangli, Klungkung and Karangasem. Sampling was done by purposive method, namely 100-150 chilies attacked by S. adipata and B. dorsalis on white chili plants. Our results indicate that the presence of S. adipata is more dominant in six districts compared to B. dorsalis, which only dominates in three districts in Bali. In general, the composition of S. adipata was 62.32% / 3,827 adults, while B. dorsalis was only 37.68% / 941 adults. The sex ratio of S. adipata and B. dorsalis was 1:2. The population density of S. adipata was higher than that of B. dorsalis. The population density of S. adipata averaged 1.05 insects/adult fruit, while B. dorsalis was 0.35 insects/adult fruit. This result is an important report and requires prevention efforts for these two pests in supporting the productivity of white chilies in Bali Province