Ayu Yuliadhi

Sycanus aurantiacus Ishikawa & Okajima, found in Bali, was first described in 2007 as a new harpactorine species based on morphological and biological characteristics; however, its genome has not yet been sequenced. In this study, we examine the mitochondrial cytochrome oxidase subunit I (MtCOI) nucleotide sequence of S. aurantiacus in order to determine whether it represents a new harpactorine species. A sample from Pancasari, Bali, Indonesia was collected at the same location S. aurantiacus was first discovered in 2007. The selected mtCOI gene (650 bp) was successfully amplified using mtCOI primer pairs LCO1490 and HCO2198, and the resulting MtCOI sequence of the S. aurantiacus sample was compared with those from other hapactorine species recorded in GenBank. This comparison revealed low genetic similarity between S. aurantiacus and most other harpactorine species worldwide, except for the Genus Sycanus (JQ888697) from USA whose mtCOI shares approximately 91% similarity with the P...

The study on the Characteristic Morphology and Biology of Sycanus aurantiacus on Tenebrio molitor larvae was conducted in the Integrated Pest Management Laboratory, Program Study of Agroecotechnology, Udayana University, Bali, Indonesia. This research aims to identify the development and predation capacity of S. aurantiacus as a predator of T. molitor in the laboratory. Development of S. aurantiacus was monitored by observing the egg incubation period, the development stages and number nymph, and the longevity of the adult. Predation capacity of S. aurantiacus was observed by exposing five different densities of T. molitor larvae to an adult predator.  The density of the prey exposed to the predator was 2, 4, 6, 8, 10 nymphs.  Experiments on the development and predation capacity were conducted with ten replications. This study revealed that the egg incubation period of S . aurantiacus was 12-14 days.  The development time of the 1 st , 2 nd , 3 rd , 4 th , and 5 th instars were 13,...