Diversity of ambrosia beetles (Coleoptera: Scolytidae) on teak forest in Malang District, East Java, Indonesia

Abstract

Arianto W, Zuhud EAM, Hikmat A, Sunarminto T, Siregar IZ. 2018. Genetic diversity of Amorphophallus titanum in Bengkulu, Indonesia based on RAPD markers. Biodiversitas 19: 1783-1790. Titan Arum [Amorphophallus titanum (Becc.) Becc. Ex Arcang], a plant species belonging to the family of Araceae is known for its gigantic floral size and elicited rotten fragrance when the flower bloom. Since it remains only found in Sumatran island, many authors categorized the plant as endemic species. The population of the species in the natural habitat has significantly declined because of the conversion of forest land mainly into plantations or other land uses. Considering the importance of conservation attempts to A. titanum, a sufficient data on genetic diversity of the species is necessary. The research was aimed to determine the genetic diversity within and among populations of A. titanum in some area of protected forests in Bengkulu Province, comprising the population of Palak Siring, Tebat Monok, and Air Selimang. RAPD genetic DNA fingerprinting approach was used to assess the genetic diversity of A. titanum using 13 preselected DNA primer: OPA 11, OPA 19, OPC 04, OPN 14, OPN 19, OPU 03, OPU 06, OPU 07, OPB 17, OPC 07, OPO 04, OPU03-1, OPNI 18E. The result revealed that the method has successfully produced several DNA fragments with varied length ranging from 250 bp to 2000 bp with 4-16 variation in polymorphic bands. Based on RAPD marker analysis, the population of Air Selimang was considered as a potential center of diversity of A. titanum because of the others two populations had a lower genetic diversity. In general, the genetic diversity among populations was lower than within population. The cluster analysis of the genetic similarity of 22 individuals of the three populations resulted in the separation into two main groups with the first group consisting of 17 individuals (Population Air Selimang and Tebat Monok) and the second group of 5 individuals (Palak Siring population).

Diversity of Fruit Flies (Diptera: Tephritidae) Attracted by Methyl Eugenol in Carambola and Papaya Orchads in Malang Regency, East Java, Indonesia

“…According to Nage et al (2023), an increase in the D value shows a decline in diversity (values of D range from 0 to 1). The dominant species in ecosystems caused by these species have not been distributed evenly (Setiawan et al, 2018).…”

“…Several studies have reported that methyl eugenol has been widely used for the detection, monitoring, and control of Bactrocera spp. (Fan et al, 2022;Manrakhan et al, 2017;Tarno et al, 2022;Setiawan et al, 2024).…”

Comparison of Two Trap Designs for Monitoring the Bark and Ambrosia Beetles (Curculionidae: Scolytinae and Platypodinae) in Mahogany Forests

“…2A). Bottle traps were also made from PET (volume of 1.5 L) and have the simplest design: a PET bottle was modified into one large window cut on the side (Setiawan et al, 2018). This trap consisted of a specimen container at the bottom, filled with a soap solution.…”

“…2B). This trap were attached to mahogany trees at approximately one meter above the ground (Setiawan et al, 2018). Based on a volume and an average release rate for ethanol as bait was 3.8 g per day at 25°C, we replaced baits every seven days.…”

Impact of urbanization on the ant diversity: a case study on teak plantation in South Sulawesi, Indonesia

“…Several predatory ants from the genera Crematogaster, Anoplolepis, and Monomorium are known to act as pest predators that attack teak plants [11]. There are important pests that commonly attack teak plants such as the ambrosia beetle [12]. The ability of ants to form colonies in tree niches such as trunks, branch cavities, and subcortical cavities of trees and their territorial behaviour can support the process of biological control of teak pests [13].…”