Dyah Rini Indriyanti, Siska Dewi Anggraeni, Muji Slamet
O. rhinoceros is a major pest of coconut palm in Indonesia. The research aims to study the ecology of the density and composition of the stadia Oryctes rhinoceros in field. The study location was determined by purposive sampling method. The observed locations were the goat and cattle manure piles, garbage piles, rotten coconut trunks, and sawmills. The insects in these sites were recorded on its number and stadia (egg-larva (grub) -pupa-imago). Then, the population density and the stadia composition were calculated. To caoture adult of O. Rhinoceros beetle observed by using pheromone, called ferotrap. The larval breeding sites were found in 26 locations. The densities of O. rhinoceros in the breeding site were 0.2-3.7 head/ind/m2. Total of O. rhinoceros were 460, consisting of eggs (5.43%), 1st instar (4.78%), 2nd instar (14.13%), 3rd instar (72.39%), and pupae (1.73%) and imago (1.52%). The most abundant composition found in the habitat was the larval stage of O. rhinoceros especially the instar 3 larvae. There were 217 O. rhinoceros and 59 Rhynchophorussp captured for 12 weeks. The benefit of this research is to predict the exact time when the insects will turn into imago and attack the coconut plantations. Therefore, it can be useful for proper control strategies. © 2006-2017 Asian Research Publishing Network (ARPN).
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, Indonesia; Estate Crop Protection Board in Salatiga, Central Java Province, India
